Merge master[4]

CodeCompletion/CodeFormatter.cs

@@ -3166,7 +3166,11 @@ namespace CodeFormatters
             if (_is_pattern_expr.left != null)
                 visit_node(_is_pattern_expr.left);
 
-            sb.Append(" is ");
+            if (_is_pattern_expr.right == null || 
+                !(_is_pattern_expr.right is collection_pattern) && !(_is_pattern_expr.right is tuple_pattern))
+                sb.Append(" is ");
+            else
+                add_space_before = true;
 
             if (_is_pattern_expr.right != null)
                 visit_node(_is_pattern_expr.right);
@@ -3211,6 +3215,80 @@ namespace CodeFormatters
             DecOffset();
         }
 
+        public override void visit(const_pattern _const_pattern)
+        {
+            visit_node(_const_pattern.pattern_expressions);
+            add_space_after = false;
+        }
+
+        public override void visit(const_pattern_parameter _const_parameter)
+        {
+            visit_node(_const_parameter.const_param);
+            add_space_after = false;
+        }
+
+        public override void visit(wild_card_deconstructor_parameter _wild_card_deconstructor_parameter)
+        {
+            sb.Append("_");
+            add_space_after = true;
+        }
+
+        public override void visit(tuple_pattern_var_parameter _tuple_pattern_var_parameter)
+        {
+            sb.Append("var");
+            SetKeywordOffset("var");
+            read_from_beg_pos = true;
+            visit_node(_tuple_pattern_var_parameter.identifier);
+        }
+
+        public override void visit(tuple_pattern_wild_card _tuple_pattern_wild_card)
+        {
+            sb.Append("_");
+            add_space_after = true;
+        }
+
+        public override void visit(tuple_pattern _tuple_pattern)
+        {
+            sb.Append("(");
+            foreach (var parameter in _tuple_pattern.parameters)
+            {
+                visit_node(parameter);
+                add_space_after = true;
+            }
+            add_space_after = false;
+        }
+
+        public override void visit(collection_pattern _collection_pattern)
+        {
+            sb.Append("[");
+            foreach (var parameter in _collection_pattern.parameters)
+            {
+                visit_node(parameter);
+                add_space_after = true;
+            }
+            add_space_after = false;
+        }
+
+        public override void visit(collection_pattern_gap_parameter _collection_pattern_gap_parameter)
+        {
+            sb.Append("..");
+            add_space_after = true;
+        }
+
+        public override void visit(collection_pattern_var_parameter _collection_pattern_var_parameter)
+        {
+            sb.Append("var");
+            SetKeywordOffset("var");
+            read_from_beg_pos = true;
+            visit_node(_collection_pattern_var_parameter.identifier);
+        }
+
+        public override void visit(collection_pattern_wild_card _collection_pattern_wild_card)
+        {
+            sb.Append("_");
+            add_space_after = true;
+        }
+
         public override void visit(deconstructor_pattern _deconstructor_pattern)
         {
             visit_node(_deconstructor_pattern.type);
@@ -3224,18 +3302,34 @@ namespace CodeFormatters
 
         public override void visit(var_deconstructor_parameter _var_deconstructor_parameter)
         {
-            sb.Append("var");
-            SetKeywordOffset("var");
-            read_from_beg_pos = true;
+            if (_var_deconstructor_parameter.var_keyword_used)
+            {
+                sb.Append("var");
+                SetKeywordOffset("var");
+                read_from_beg_pos = true;
+            }
             visit_node(_var_deconstructor_parameter.identifier);
             if (_var_deconstructor_parameter.type != null)
                 visit_node(_var_deconstructor_parameter.type);
         }
 
+        public override void visit(recursive_pattern_parameter _recursive_pattern_parameter)
+        {
+            visit_node(_recursive_pattern_parameter.pattern);
+        }
+
         public override void visit(recursive_deconstructor_parameter _recursive_deconstructor_parameter)
         {
             visit_node(_recursive_deconstructor_parameter.pattern);
         }
+        public override void visit(recursive_tuple_parameter _recursive_tuple_parameter)
+        {
+            visit_node(_recursive_tuple_parameter.pattern);
+        }
+        public override void visit(recursive_collection_parameter _recursive_collection_parameter)
+        {
+            visit_node(_recursive_collection_parameter.pattern);
+        }
 
         public override void visit(var_tuple_def_statement _var_tuple_def_statement)
         {

CodeCompletion/DomSyntaxTreeVisitor.cs

@@ -777,7 +777,7 @@ namespace CodeCompletion
             }
             else
             {
-                foreach (pattern_deconstructor_parameter pdp in _deconstructor_pattern.parameters)
+                foreach (pattern_parameter pdp in _deconstructor_pattern.parameters)
                 {
                     if (pdp is var_deconstructor_parameter)
                     {

CodeCompletion/FindReferences.cs

@@ -1682,7 +1682,7 @@ namespace CodeCompletion
         public override void visit(deconstructor_pattern _deconstructor_pattern)
         {
             _deconstructor_pattern.type.visit(this);
-            foreach (pattern_deconstructor_parameter pdp in _deconstructor_pattern.parameters)
+            foreach (pattern_parameter pdp in _deconstructor_pattern.parameters)
                 pdp.visit(this);
         }
         public override void visit(recursive_deconstructor_parameter _recursive_deconstructor_parameter)

CodeExamples/Patterns/patterns-collection-matching1.pas

@@ -0,0 +1,43 @@
+type
+  CardInfo = auto class
+  public 
+    cardNumber: string;
+    cv: integer;
+  end;
+  
+  Person = class
+  
+  public 
+    name: string;
+    age: integer;
+    card: CardInfo;
+    
+    constructor(name: string; age: integer; card: CardInfo);
+    begin
+      self.name := name;
+      self.age := age;
+      self.card := card;
+    end;
+    
+    procedure Deconstruct(var name: string; var age: integer; var card: CardInfo);
+    begin
+      name := self.name;
+      age := self.age;
+      card := self.card;
+    end;
+  end;
+
+begin
+  var a := Arr(1, 9, 8, 7, 2, 3, 4, 5); 
+  
+  // Расширенный is
+  if a is [1, .., var x, _, 5] then
+    Println(x);
+  
+  // match .. with
+  match a with
+    [1, 9, 8, _, 2]: print(1);
+    [.., var y, var x]: print(x + y);
+    [_, .., _]: print(3);
+  end;
+end.

CodeExamples/Patterns/patterns-collection-matching2.pas

@@ -0,0 +1,46 @@
+type
+  CardInfo = auto class
+  public 
+    cardNumber: string;
+    cv: integer;
+  end;
+  
+  Person = class
+  
+  public 
+    name: string;
+    age: integer;
+    card: CardInfo;
+    
+    constructor(name: string; age: integer; card: CardInfo);
+    begin
+      self.name := name;
+      self.age := age;
+      self.card := card;
+    end;
+    
+    procedure Deconstruct(var name: string; var age: integer; var card: CardInfo);
+    begin
+      name := self.name;
+      age := self.age;
+      card := self.card;
+    end;
+  end;
+
+begin
+  var p1 := new Person('Вася', 11, new CardInfo('12345671', 321));
+  var p2 := new Person('Петя', 12, new CardInfo('12345672', 322));
+  var p3 := new Person('Маша', 13, new CardInfo('12345673', 323));
+  var personArr := Arr(p1, p2, p3);
+  
+  // Расширенный is
+  if personArr is [Person(name1, 11, CardInfo(_, cv)), _, Person(name2, 13, _)] then 
+    println(name1, cv, name2);
+  
+  // match .. with
+  match personArr with
+    [_, _, Person('Вася', age, _)]: print(age);
+    [var p, .., Person('Маша', _, _)]: print((p as Person).name);
+    [..]: print(1);
+  end;
+end.

CodeExamples/Patterns/patterns-collection-matching3.pas

@@ -0,0 +1,43 @@
+type
+  CardInfo = auto class
+  public 
+    cardNumber: string;
+    cv: integer;
+  end;
+  
+  Person = class
+    name: string;
+    age: integer;
+    card: List<CardInfo> := new List<CardInfo>();
+    
+    constructor(name: string; age: integer; card: List<CardInfo>);
+    begin
+      self.name := name;
+      self.age := age;
+      self.card := card;
+    end;
+    
+    procedure Deconstruct(var name: string; var age: integer; var card: List<CardInfo>);
+    begin
+      name := self.name;
+      age := self.age;
+      card := self.card;
+    end;
+  end;
+
+begin
+  var cards := new List<CardInfo>();
+  cards.Add(new CardInfo('12345671', 321));
+  cards.Add(new CardInfo('12345672', 322));
+  cards.Add(new CardInfo('12345673', 323));
+  cards.Add(new CardInfo('12345674', 324));
+  
+  var p := new Person('Вася', 21, cards);
+  
+  // match .. with
+  match p with
+    Person('Петя', _, _): print('Петя');
+    Person('Вася', _, [_, _, var x]): print(x);
+    Person(name, _, [CardInfo(_, 321), .., CardInfo(_, 324)]): print(name);
+  end;
+end.

CodeExamples/Patterns/patterns-simple-const.pas

@@ -0,0 +1,8 @@
+begin
+  var a := 3.14;
+  match a with
+    1.0, 2.0, 3.0: Println(1);
+    3.13, 3.14, 3.15, 3.16: print(2);
+    123.0: print(3);
+  end;
+end.

CodeExamples/Patterns/patterns-simple-tuple.pas

@@ -0,0 +1,7 @@
+begin
+  match (1, 2, 'string') with
+    (1, _, var x): Println(x);  
+    (1, _, 'strin'): print(2);
+    (_, _, 'string'): print(3);
+  end;
+end.

CodeExamples/Patterns/patterns-type-matching1.pas

@@ -0,0 +1,40 @@
+type
+  CardInfo = auto class
+  public 
+    cardNumber: string;
+    cv: integer;
+  end;
+  
+  Person = class
+    name: string;
+    age: integer;
+    card: CardInfo;
+    
+    constructor(name: string; age: integer; card: CardInfo);
+    begin
+      self.name := name;
+      self.age := age;
+      self.card := card;
+    end;
+    
+    procedure Deconstruct(var name: string; var age: integer; var card: CardInfo);
+    begin
+      name := self.name;
+      age := self.age;
+      card := self.card;
+    end;
+  end;
+
+begin
+  var a := new Person('Вася', 11, new CardInfo('12345678', 324));
+  
+  // Расширенный is
+  if a is Person(_, var age, CardInfo(_, var cv)) then Println(age, cv);
+  
+  // match .. with
+  match a with
+    Person('Петя', 12, CardInfo('12345678', var cv)): Println(cv); 
+    Person('Вася', _, CardInfo(cardNum, 324)): Println(cardNum);
+    Person(_, _, CardInfo(_, x)): Println(x);
+  end;
+end.

ParserTools/SyntaxTreeVisitors/SyntaxTreeComparer.cs

@@ -2313,7 +2313,7 @@ namespace PascalABCCompiler.SyntaxTree
             }
         }
 
-        public void CompareInternal(pattern_deconstructor_parameter left, pattern_deconstructor_parameter right)
+        public void CompareInternal(pattern_parameter left, pattern_parameter right)
         {
             if (left == null && right != null || left != null && right == null)
                 throw_not_equal(left, right);

Parsers/PascalABCParserNewSaushkin/ABCPascal.lex

@@ -191,6 +191,7 @@ UNICODEARROW \x890
 "["              { return (int)Tokens.tkSquareOpen; }
 "]"              { return (int)Tokens.tkSquareClose; }
 "?"              { return (int)Tokens.tkQuestion; }
+"_"				 { return (int)Tokens.tkUnderscore; }
 "?."              { return (int)Tokens.tkQuestionPoint; }
 "??"              { return (int)Tokens.tkDoubleQuestion; }
 "?["              { return (int)Tokens.tkQuestionSquareOpen; }

Parsers/PascalABCParserNewSaushkin/ABCPascal.y

@@ -32,7 +32,7 @@
 
 %start parse_goal
 
-%token <ti> tkDirectiveName tkAmpersend tkColon tkDotDot tkPoint tkRoundOpen tkRoundClose tkSemiColon tkSquareOpen tkSquareClose tkQuestion tkQuestionPoint tkDoubleQuestion tkQuestionSquareOpen
+%token <ti> tkDirectiveName tkAmpersend tkColon tkDotDot tkPoint tkRoundOpen tkRoundClose tkSemiColon tkSquareOpen tkSquareClose tkQuestion tkUnderscore tkQuestionPoint tkDoubleQuestion tkQuestionSquareOpen
 %token <ti> tkSizeOf tkTypeOf tkWhere tkArray tkCase tkClass tkAuto tkStatic tkConst tkConstructor tkDestructor tkElse  tkExcept tkFile tkFor tkForeach tkFunction tkMatch tkWhen
 %token <ti> tkIf tkImplementation tkInherited tkInterface tkProcedure tkOperator tkProperty tkRaise tkRecord tkSet tkType tkThen tkUses tkVar tkWhile tkWith tkNil 
 %token <ti> tkGoto tkOf tkLabel tkLock tkProgram tkEvent tkDefault tkTemplate tkPacked tkExports tkResourceString tkThreadvar tkSealed tkPartial tkTo tkDownto
@@ -146,7 +146,7 @@
 %type <stn> simple_property_definition
 %type <stn> stmt_or_expression unlabelled_stmt stmt case_item
 %type <td> set_type  
-%type <ex> as_is_expr as_is_constexpr is_expr as_expr power_expr power_constexpr
+%type <ex> as_is_expr as_is_constexpr is_type_expr as_expr power_expr power_constexpr
 %type <td> unsized_array_type simple_type_or_ simple_type simple_type_question/*array_name_for_new_expr*/ foreach_stmt_ident_dype_opt fptype type_ref fptype_noproctype array_type 
 %type <td> template_param template_empty_param structured_type unpacked_structured_type empty_template_type_reference simple_or_template_type_reference type_ref_or_secific for_stmt_decl_or_assign type_decl_type
 %type <stn> type_ref_and_secific_list  
@@ -175,8 +175,10 @@
 %type <stn> full_lambda_fp_list lambda_simple_fp_sect lambda_function_body lambda_procedure_body common_lambda_body optional_full_lambda_fp_list
 %type <ob> field_in_unnamed_object list_fields_in_unnamed_object func_class_name_ident_list rem_lambda variable_list var_ident_list
 %type <ti> tkAssignOrEqual
-%type <stn> pattern pattern_optional_var match_with pattern_case pattern_cases pattern_out_param pattern_out_param_optional_var 
-%type <ob> pattern_out_param_list pattern_out_param_list_optional_var
+%type <stn> pattern pattern_optional_var const_pattern collection_pattern tuple_pattern collection_pattern_list_item tuple_pattern_item collection_pattern_var_item match_with pattern_case pattern_cases pattern_out_param pattern_out_param_optional_var const_pattern_expr_list 
+%type <ob> pattern_out_param_list pattern_out_param_list_optional_var collection_pattern_expr_list tuple_pattern_item_list
+%type <ex> const_pattern_expression
+
 %%
 
 parse_goal                
@@ -2806,6 +2808,22 @@ pattern_case
         {
             $$ = new pattern_case($1 as pattern_node, $3 as statement, null, @$);
         }  
+	| const_pattern tkWhen expr_l1 tkColon unlabelled_stmt
+		{
+			$$ = new pattern_case($1 as pattern_node, $5 as statement, $3, @$);
+		}
+	| const_pattern tkColon unlabelled_stmt
+		{
+			$$ = new pattern_case($1 as pattern_node, $3 as statement, null, @$);
+		}
+	| collection_pattern tkColon unlabelled_stmt
+		{
+			$$ = new pattern_case($1 as pattern_node, $3 as statement, null, @$);
+		}
+	| tuple_pattern tkColon unlabelled_stmt
+		{
+			$$ = new pattern_case($1 as pattern_node, $3 as statement, null, @$);
+		}
     ;
     
 case_stmt
@@ -3282,44 +3300,188 @@ relop_expr
         { 
 			$$ = new bin_expr($1, $3, $2.type, @$); 
 		}
-    | is_expr tkRoundOpen pattern_out_param_list tkRoundClose
+    | is_type_expr tkRoundOpen pattern_out_param_list tkRoundClose
         {
             var isTypeCheck = $1 as typecast_node;
-            var deconstructorPattern = new deconstructor_pattern($3 as List<pattern_deconstructor_parameter>, isTypeCheck.type_def, @$); 
+            var deconstructorPattern = new deconstructor_pattern($3 as List<pattern_parameter>, isTypeCheck.type_def, null, @$); 
             $$ = new is_pattern_expr(isTypeCheck.expr, deconstructorPattern, @$);
         }
+	
+	| term tkIs collection_pattern
+        {
+            $$ = new is_pattern_expr($1, $3 as pattern_node, @$);
+        }
+	| term tkIs tuple_pattern
+        {
+            $$ = new is_pattern_expr($1, $3 as pattern_node, @$);
+        }
     ;
     
 pattern
     : simple_or_template_type_reference tkRoundOpen pattern_out_param_list tkRoundClose
         { 
-            $$ = new deconstructor_pattern($3 as List<pattern_deconstructor_parameter>, $1, @$); 
+            $$ = new deconstructor_pattern($3 as List<pattern_parameter>, $1, null, @$); 
         }
     ;
 
 pattern_optional_var
     : simple_or_template_type_reference tkRoundOpen pattern_out_param_list_optional_var tkRoundClose
         { 
-            $$ = new deconstructor_pattern($3 as List<pattern_deconstructor_parameter>, $1, @$); 
+            $$ = new deconstructor_pattern($3 as List<pattern_parameter>, $1, null, @$); 
         }
-    ;    
+    ;  
+
+collection_pattern
+	: tkSquareOpen collection_pattern_expr_list tkSquareClose
+		{
+			$$ = new collection_pattern($2 as List<pattern_parameter>, @$);
+		}
+	;
+
+collection_pattern_expr_list
+	: collection_pattern_list_item
+		{
+			$$ = new List<pattern_parameter>();
+            ($$ as List<pattern_parameter>).Add($1 as pattern_parameter);
+		}
+	| collection_pattern_expr_list tkComma collection_pattern_list_item
+		{
+			var list = $1 as List<pattern_parameter>;
+            list.Add($3 as pattern_parameter);
+            $$ = list;
+		}
+	;
+
+collection_pattern_list_item
+	: literal_or_number
+		{
+			$$ = new const_pattern_parameter($1, @$);
+		}
+	| collection_pattern_var_item
+		{
+			$$ = $1;
+		}
+	| tkUnderscore
+		{
+			$$ = new collection_pattern_wild_card(@$);
+		}
+	/*| pattern 
+        {
+            $$ = new recursive_deconstructor_parameter($1 as pattern_node, @$);
+        }*/
+	| pattern_optional_var
+        {
+            $$ = new recursive_deconstructor_parameter($1 as pattern_node, @$);
+        }
+	| collection_pattern
+		{
+			$$ = new recursive_collection_parameter($1 as pattern_node, @$);
+		}
+	| tuple_pattern
+		{
+			$$ = new recursive_tuple_parameter($1 as pattern_node, @$);
+		}
+	| tkDotDot
+		{
+			$$ = new collection_pattern_gap_parameter(@$);
+		}
+	;
+
+collection_pattern_var_item
+    : tkVar identifier
+        {
+            $$ = new collection_pattern_var_parameter($2, null, @$);
+        }
+    ;   
+
+const_pattern
+	: const_pattern_expr_list
+		{
+			$$ = new const_pattern($1 as expression_list, @$); 
+		}
+	;
+
+const_pattern_expr_list
+	: const_pattern_expression 
+		{ 
+			$$ = new expression_list($1, @$); 
+		}
+	| const_pattern_expr_list tkComma const_pattern_expression 
+		{ 
+			$$ = ($1 as expression_list).Add($3, @$);
+		}
+	;
+
+const_pattern_expression
+	: literal_or_number  { $$ = $1; }
+	;
     
+tuple_pattern
+	: tkRoundOpen tuple_pattern_item_list tkRoundClose
+		{
+			if (($2 as List<pattern_parameter>).Count>6) 
+				parsertools.AddErrorFromResource("TUPLE_ELEMENTS_COUNT_MUST_BE_LESSEQUAL_7",@$);
+			$$ = new tuple_pattern($2 as List<pattern_parameter>, @$);
+		}	
+    ; 
+
+tuple_pattern_item
+	: tkUnderscore 
+		{ 
+			$$ = new tuple_pattern_wild_card(@$); 
+		} 
+	| literal_or_number 
+		{ 
+			$$ = new const_pattern_parameter($1, @$);
+		}
+    | tkVar identifier
+        {
+            $$ = new tuple_pattern_var_parameter($2, null, @$);
+        }
+	| pattern_optional_var
+        {
+            $$ = new recursive_deconstructor_parameter($1 as pattern_node, @$);
+        }
+	| collection_pattern
+		{
+			$$ = new recursive_collection_parameter($1 as pattern_node, @$);
+		}
+	| tuple_pattern
+		{
+			$$ = new recursive_tuple_parameter($1 as pattern_node, @$);
+		}
+	;
+
+tuple_pattern_item_list
+	: tuple_pattern_item
+		{ 
+			$$ = new List<pattern_parameter>();
+            ($$ as List<pattern_parameter>).Add($1 as pattern_parameter);
+		}
+	| tuple_pattern_item_list tkComma tuple_pattern_item
+		{
+			var list = $1 as List<pattern_parameter>;
+            list.Add($3 as pattern_parameter);
+            $$ = list;
+		}
+	;
+
 pattern_out_param_list_optional_var
     : pattern_out_param_optional_var
         {
-            $$ = new List<pattern_deconstructor_parameter>();
-            ($$ as List<pattern_deconstructor_parameter>).Add($1 as pattern_deconstructor_parameter);
+            $$ = new List<pattern_parameter>();
+            ($$ as List<pattern_parameter>).Add($1 as pattern_parameter);
         }
     | pattern_out_param_list_optional_var tkSemiColon pattern_out_param_optional_var
         {
-            var list = $1 as List<pattern_deconstructor_parameter>;
-            list.Add($3 as pattern_deconstructor_parameter);
+            var list = $1 as List<pattern_parameter>;
+            list.Add($3 as pattern_parameter);
             $$ = list;
         }
     | pattern_out_param_list_optional_var tkComma pattern_out_param_optional_var
         {
-            var list = $1 as List<pattern_deconstructor_parameter>;
-            list.Add($3 as pattern_deconstructor_parameter);
+            var list = $1 as List<pattern_parameter>;
+            list.Add($3 as pattern_parameter);
             $$ = list;
         }
     ;
@@ -3327,59 +3489,91 @@ pattern_out_param_list_optional_var
 pattern_out_param_list
     : pattern_out_param
         {
-            $$ = new List<pattern_deconstructor_parameter>();
-            ($$ as List<pattern_deconstructor_parameter>).Add($1 as pattern_deconstructor_parameter);
+            $$ = new List<pattern_parameter>();
+            ($$ as List<pattern_parameter>).Add($1 as pattern_parameter);
         }
     | pattern_out_param_list tkSemiColon pattern_out_param
         {
-            var list = $1 as List<pattern_deconstructor_parameter>;
-            list.Add($3 as pattern_deconstructor_parameter);
+            var list = $1 as List<pattern_parameter>;
+            list.Add($3 as pattern_parameter);
             $$ = list;
         }
     | pattern_out_param_list tkComma pattern_out_param
         {
-            var list = $1 as List<pattern_deconstructor_parameter>;
-            list.Add($3 as pattern_deconstructor_parameter);
+            var list = $1 as List<pattern_parameter>;
+            list.Add($3 as pattern_parameter);
             $$ = list;
         }
     ;    
     
 pattern_out_param
-    : tkVar identifier tkColon type_ref
+    : tkUnderscore
+		{
+			$$ = new wild_card_deconstructor_parameter(@$);
+		}
+	| literal_or_number
+		{
+			$$ = new const_pattern_parameter($1, @$);
+		}
+	| tkVar identifier tkColon type_ref
         {
-            $$ = new var_deconstructor_parameter($2, $4, @$);
+            $$ = new var_deconstructor_parameter($2, $4, true, @$);
         }
     | tkVar identifier
         {
-            $$ = new var_deconstructor_parameter($2, null, @$);
+            $$ = new var_deconstructor_parameter($2, null, true, @$);
         }
     | pattern 
         {
             $$ = new recursive_deconstructor_parameter($1 as pattern_node, @$);
         }
+	| collection_pattern
+		{
+			$$ = new recursive_collection_parameter($1 as pattern_node, @$);
+		}
+	| tuple_pattern
+		{
+			$$ = new recursive_tuple_parameter($1 as pattern_node, @$);
+		}
     ;    
     
 pattern_out_param_optional_var
-    : identifier tkColon type_ref
+	: tkUnderscore
+		{
+			$$ = new wild_card_deconstructor_parameter(@$);
+		}
+	| literal_or_number
+		{
+			$$ = new const_pattern_parameter($1, @$);
+		}
+    | identifier tkColon type_ref
         {
-            $$ = new var_deconstructor_parameter($1, $3, @$);
+            $$ = new var_deconstructor_parameter($1, $3, false, @$);
         }
     | identifier
         {
-            $$ = new var_deconstructor_parameter($1, null, @$);
+            $$ = new var_deconstructor_parameter($1, null, false, @$);
         }
     | tkVar identifier tkColon type_ref
         {
-            $$ = new var_deconstructor_parameter($2, $4, @$);
+            $$ = new var_deconstructor_parameter($2, $4, true, @$);
         }
     | tkVar identifier
         {
-            $$ = new var_deconstructor_parameter($2, null, @$);
+            $$ = new var_deconstructor_parameter($2, null, true, @$);
         }
     | pattern_optional_var
         {
             $$ = new recursive_deconstructor_parameter($1 as pattern_node, @$);
         }
+	| collection_pattern
+		{
+			$$ = new recursive_collection_parameter($1 as pattern_node, @$);
+		}
+	| tuple_pattern
+		{
+			$$ = new recursive_tuple_parameter($1 as pattern_node, @$);
+		}
     ;
     
 simple_expr_or_nothing
@@ -3494,7 +3688,7 @@ typecast_op
     ;
 
 as_is_expr
-    : is_expr   
+    : is_type_expr   
         { $$ = $1; }
     | as_expr
         { $$ = $1; }
@@ -3507,7 +3701,7 @@ as_expr
         }
     ;
     
-is_expr
+is_type_expr
     : term tkIs simple_or_template_type_reference
         {
             $$ = NewAsIsExpr($1, op_typecast.is_op, $3, @$);

SyntaxTree/tree/AbstractVisitor.cs

@@ -1153,9 +1153,9 @@ namespace PascalABCCompiler.SyntaxTree
 			DefaultVisit(_deconstructor_pattern);
 		}
 
-		public virtual void visit(pattern_deconstructor_parameter _pattern_deconstructor_parameter)
+		public virtual void visit(pattern_parameter _pattern_parameter)
 		{
-			DefaultVisit(_pattern_deconstructor_parameter);
+			DefaultVisit(_pattern_parameter);
 		}
 
 		public virtual void visit(desugared_deconstruction _desugared_deconstruction)
@@ -1187,6 +1187,71 @@ namespace PascalABCCompiler.SyntaxTree
 		{
 			DefaultVisit(_semantic_check_sugared_var_def_statement_node);
 		}
+
+		public virtual void visit(const_pattern _const_pattern)
+		{
+			DefaultVisit(_const_pattern);
+		}
+
+		public virtual void visit(tuple_pattern_wild_card _tuple_pattern_wild_card)
+		{
+			DefaultVisit(_tuple_pattern_wild_card);
+		}
+
+		public virtual void visit(const_pattern_parameter _const_pattern_parameter)
+		{
+			DefaultVisit(_const_pattern_parameter);
+		}
+
+		public virtual void visit(wild_card_deconstructor_parameter _wild_card_deconstructor_parameter)
+		{
+			DefaultVisit(_wild_card_deconstructor_parameter);
+		}
+
+		public virtual void visit(collection_pattern _collection_pattern)
+		{
+			DefaultVisit(_collection_pattern);
+		}
+
+		public virtual void visit(collection_pattern_gap_parameter _collection_pattern_gap_parameter)
+		{
+			DefaultVisit(_collection_pattern_gap_parameter);
+		}
+
+		public virtual void visit(collection_pattern_wild_card _collection_pattern_wild_card)
+		{
+			DefaultVisit(_collection_pattern_wild_card);
+		}
+
+		public virtual void visit(collection_pattern_var_parameter _collection_pattern_var_parameter)
+		{
+			DefaultVisit(_collection_pattern_var_parameter);
+		}
+
+		public virtual void visit(recursive_collection_parameter _recursive_collection_parameter)
+		{
+			DefaultVisit(_recursive_collection_parameter);
+		}
+
+		public virtual void visit(recursive_pattern_parameter _recursive_pattern_parameter)
+		{
+			DefaultVisit(_recursive_pattern_parameter);
+		}
+
+		public virtual void visit(tuple_pattern _tuple_pattern)
+		{
+			DefaultVisit(_tuple_pattern);
+		}
+
+		public virtual void visit(tuple_pattern_var_parameter _tuple_pattern_var_parameter)
+		{
+			DefaultVisit(_tuple_pattern_var_parameter);
+		}
+
+		public virtual void visit(recursive_tuple_parameter _recursive_tuple_parameter)
+		{
+			DefaultVisit(_recursive_tuple_parameter);
+		}
 	}
 
 

SyntaxTree/tree/HierarchyVisitor.cs

@@ -1837,11 +1837,11 @@ namespace PascalABCCompiler.SyntaxTree
 		{
 		}
 
-		public virtual void pre_do_visit(pattern_deconstructor_parameter _pattern_deconstructor_parameter)
+		public virtual void pre_do_visit(pattern_parameter _pattern_parameter)
 		{
 		}
 
-		public virtual void post_do_visit(pattern_deconstructor_parameter _pattern_deconstructor_parameter)
+		public virtual void post_do_visit(pattern_parameter _pattern_parameter)
 		{
 		}
 
@@ -1893,6 +1893,110 @@ namespace PascalABCCompiler.SyntaxTree
 		{
 		}
 
+		public virtual void pre_do_visit(const_pattern _const_pattern)
+		{
+		}
+
+		public virtual void post_do_visit(const_pattern _const_pattern)
+		{
+		}
+
+		public virtual void pre_do_visit(tuple_pattern_wild_card _tuple_pattern_wild_card)
+		{
+		}
+
+		public virtual void post_do_visit(tuple_pattern_wild_card _tuple_pattern_wild_card)
+		{
+		}
+
+		public virtual void pre_do_visit(const_pattern_parameter _const_pattern_parameter)
+		{
+		}
+
+		public virtual void post_do_visit(const_pattern_parameter _const_pattern_parameter)
+		{
+		}
+
+		public virtual void pre_do_visit(wild_card_deconstructor_parameter _wild_card_deconstructor_parameter)
+		{
+		}
+
+		public virtual void post_do_visit(wild_card_deconstructor_parameter _wild_card_deconstructor_parameter)
+		{
+		}
+
+		public virtual void pre_do_visit(collection_pattern _collection_pattern)
+		{
+		}
+
+		public virtual void post_do_visit(collection_pattern _collection_pattern)
+		{
+		}
+
+		public virtual void pre_do_visit(collection_pattern_gap_parameter _collection_pattern_gap_parameter)
+		{
+		}
+
+		public virtual void post_do_visit(collection_pattern_gap_parameter _collection_pattern_gap_parameter)
+		{
+		}
+
+		public virtual void pre_do_visit(collection_pattern_wild_card _collection_pattern_wild_card)
+		{
+		}
+
+		public virtual void post_do_visit(collection_pattern_wild_card _collection_pattern_wild_card)
+		{
+		}
+
+		public virtual void pre_do_visit(collection_pattern_var_parameter _collection_pattern_var_parameter)
+		{
+		}
+
+		public virtual void post_do_visit(collection_pattern_var_parameter _collection_pattern_var_parameter)
+		{
+		}
+
+		public virtual void pre_do_visit(recursive_collection_parameter _recursive_collection_parameter)
+		{
+		}
+
+		public virtual void post_do_visit(recursive_collection_parameter _recursive_collection_parameter)
+		{
+		}
+
+		public virtual void pre_do_visit(recursive_pattern_parameter _recursive_pattern_parameter)
+		{
+		}
+
+		public virtual void post_do_visit(recursive_pattern_parameter _recursive_pattern_parameter)
+		{
+		}
+
+		public virtual void pre_do_visit(tuple_pattern _tuple_pattern)
+		{
+		}
+
+		public virtual void post_do_visit(tuple_pattern _tuple_pattern)
+		{
+		}
+
+		public virtual void pre_do_visit(tuple_pattern_var_parameter _tuple_pattern_var_parameter)
+		{
+		}
+
+		public virtual void post_do_visit(tuple_pattern_var_parameter _tuple_pattern_var_parameter)
+		{
+		}
+
+		public virtual void pre_do_visit(recursive_tuple_parameter _recursive_tuple_parameter)
+		{
+		}
+
+		public virtual void post_do_visit(recursive_tuple_parameter _recursive_tuple_parameter)
+		{
+		}
+
 		public override void visit(expression _expression)
 		{
 			DefaultVisit(_expression);
@@ -3804,6 +3908,8 @@ namespace PascalABCCompiler.SyntaxTree
 		{
 			DefaultVisit(_pattern_node);
 			pre_do_visit(_pattern_node);
+			for (int i = 0; i < parameters.Count; i++)
+				visit(pattern_node.parameters[i]);
 			post_do_visit(_pattern_node);
 		}
 
@@ -3858,17 +3964,16 @@ namespace PascalABCCompiler.SyntaxTree
 		{
 			DefaultVisit(_deconstructor_pattern);
 			pre_do_visit(_deconstructor_pattern);
-			for (int i = 0; i < parameters.Count; i++)
-				visit(deconstructor_pattern.parameters[i]);
 			visit(deconstructor_pattern.type);
+			visit(deconstructor_pattern.const_params_check);
 			post_do_visit(_deconstructor_pattern);
 		}
 
-		public override void visit(pattern_deconstructor_parameter _pattern_deconstructor_parameter)
+		public override void visit(pattern_parameter _pattern_parameter)
 		{
-			DefaultVisit(_pattern_deconstructor_parameter);
-			pre_do_visit(_pattern_deconstructor_parameter);
-			post_do_visit(_pattern_deconstructor_parameter);
+			DefaultVisit(_pattern_parameter);
+			pre_do_visit(_pattern_parameter);
+			post_do_visit(_pattern_parameter);
 		}
 
 		public override void visit(desugared_deconstruction _desugared_deconstruction)
@@ -3893,7 +3998,6 @@ namespace PascalABCCompiler.SyntaxTree
 		{
 			DefaultVisit(_recursive_deconstructor_parameter);
 			pre_do_visit(_recursive_deconstructor_parameter);
-			visit(recursive_deconstructor_parameter.pattern);
 			post_do_visit(_recursive_deconstructor_parameter);
 		}
 
@@ -3921,6 +4025,104 @@ namespace PascalABCCompiler.SyntaxTree
 				visit(semantic_check_sugared_var_def_statement_node.lst[i]);
 			post_do_visit(_semantic_check_sugared_var_def_statement_node);
 		}
+
+		public override void visit(const_pattern _const_pattern)
+		{
+			DefaultVisit(_const_pattern);
+			pre_do_visit(_const_pattern);
+			visit(const_pattern.pattern_expressions);
+			post_do_visit(_const_pattern);
+		}
+
+		public override void visit(tuple_pattern_wild_card _tuple_pattern_wild_card)
+		{
+			DefaultVisit(_tuple_pattern_wild_card);
+			pre_do_visit(_tuple_pattern_wild_card);
+			post_do_visit(_tuple_pattern_wild_card);
+		}
+
+		public override void visit(const_pattern_parameter _const_pattern_parameter)
+		{
+			DefaultVisit(_const_pattern_parameter);
+			pre_do_visit(_const_pattern_parameter);
+			visit(const_pattern_parameter.const_param);
+			post_do_visit(_const_pattern_parameter);
+		}
+
+		public override void visit(wild_card_deconstructor_parameter _wild_card_deconstructor_parameter)
+		{
+			DefaultVisit(_wild_card_deconstructor_parameter);
+			pre_do_visit(_wild_card_deconstructor_parameter);
+			post_do_visit(_wild_card_deconstructor_parameter);
+		}
+
+		public override void visit(collection_pattern _collection_pattern)
+		{
+			DefaultVisit(_collection_pattern);
+			pre_do_visit(_collection_pattern);
+			post_do_visit(_collection_pattern);
+		}
+
+		public override void visit(collection_pattern_gap_parameter _collection_pattern_gap_parameter)
+		{
+			DefaultVisit(_collection_pattern_gap_parameter);
+			pre_do_visit(_collection_pattern_gap_parameter);
+			post_do_visit(_collection_pattern_gap_parameter);
+		}
+
+		public override void visit(collection_pattern_wild_card _collection_pattern_wild_card)
+		{
+			DefaultVisit(_collection_pattern_wild_card);
+			pre_do_visit(_collection_pattern_wild_card);
+			post_do_visit(_collection_pattern_wild_card);
+		}
+
+		public override void visit(collection_pattern_var_parameter _collection_pattern_var_parameter)
+		{
+			DefaultVisit(_collection_pattern_var_parameter);
+			pre_do_visit(_collection_pattern_var_parameter);
+			visit(collection_pattern_var_parameter.identifier);
+			visit(collection_pattern_var_parameter.type);
+			post_do_visit(_collection_pattern_var_parameter);
+		}
+
+		public override void visit(recursive_collection_parameter _recursive_collection_parameter)
+		{
+			DefaultVisit(_recursive_collection_parameter);
+			pre_do_visit(_recursive_collection_parameter);
+			post_do_visit(_recursive_collection_parameter);
+		}
+
+		public override void visit(recursive_pattern_parameter _recursive_pattern_parameter)
+		{
+			DefaultVisit(_recursive_pattern_parameter);
+			pre_do_visit(_recursive_pattern_parameter);
+			visit(recursive_pattern_parameter.pattern);
+			post_do_visit(_recursive_pattern_parameter);
+		}
+
+		public override void visit(tuple_pattern _tuple_pattern)
+		{
+			DefaultVisit(_tuple_pattern);
+			pre_do_visit(_tuple_pattern);
+			post_do_visit(_tuple_pattern);
+		}
+
+		public override void visit(tuple_pattern_var_parameter _tuple_pattern_var_parameter)
+		{
+			DefaultVisit(_tuple_pattern_var_parameter);
+			pre_do_visit(_tuple_pattern_var_parameter);
+			visit(tuple_pattern_var_parameter.identifier);
+			visit(tuple_pattern_var_parameter.type);
+			post_do_visit(_tuple_pattern_var_parameter);
+		}
+
+		public override void visit(recursive_tuple_parameter _recursive_tuple_parameter)
+		{
+			DefaultVisit(_recursive_tuple_parameter);
+			pre_do_visit(_recursive_tuple_parameter);
+			post_do_visit(_recursive_tuple_parameter);
+		}
 	}
 
 

SyntaxTree/tree/SyntaxTreeStreamReader.cs

@@ -479,7 +479,7 @@ namespace PascalABCCompiler.SyntaxTree
 				case 228:
 					return new deconstructor_pattern();
 				case 229:
-					return new pattern_deconstructor_parameter();
+					return new pattern_parameter();
 				case 230:
 					return new desugared_deconstruction();
 				case 231:
@@ -492,6 +492,32 @@ namespace PascalABCCompiler.SyntaxTree
 					return new var_tuple_def_statement();
 				case 235:
 					return new semantic_check_sugared_var_def_statement_node();
+				case 236:
+					return new const_pattern();
+				case 237:
+					return new tuple_pattern_wild_card();
+				case 238:
+					return new const_pattern_parameter();
+				case 239:
+					return new wild_card_deconstructor_parameter();
+				case 240:
+					return new collection_pattern();
+				case 241:
+					return new collection_pattern_gap_parameter();
+				case 242:
+					return new collection_pattern_wild_card();
+				case 243:
+					return new collection_pattern_var_parameter();
+				case 244:
+					return new recursive_collection_parameter();
+				case 245:
+					return new recursive_pattern_parameter();
+				case 246:
+					return new tuple_pattern();
+				case 247:
+					return new tuple_pattern_var_parameter();
+				case 248:
+					return new recursive_tuple_parameter();
 			}
 			return null;
 		}
@@ -3964,6 +3990,19 @@ namespace PascalABCCompiler.SyntaxTree
 		public void read_pattern_node(pattern_node _pattern_node)
 		{
 			read_syntax_tree_node(_pattern_node);
+			if (br.ReadByte() == 0)
+			{
+				_pattern_node.parameters = null;
+			}
+			else
+			{
+				_pattern_node.parameters = new List<pattern_parameter>();
+				Int32 ssyy_count = br.ReadInt32();
+				for(Int32 ssyy_i = 0; ssyy_i < ssyy_count; ssyy_i++)
+				{
+					_pattern_node.parameters.Add(_read_node() as pattern_parameter);
+				}
+			}
 		}
 
 
@@ -4053,31 +4092,19 @@ namespace PascalABCCompiler.SyntaxTree
 		public void read_deconstructor_pattern(deconstructor_pattern _deconstructor_pattern)
 		{
 			read_pattern_node(_deconstructor_pattern);
-			if (br.ReadByte() == 0)
-			{
-				_deconstructor_pattern.parameters = null;
-			}
-			else
-			{
-				_deconstructor_pattern.parameters = new List<pattern_deconstructor_parameter>();
-				Int32 ssyy_count = br.ReadInt32();
-				for(Int32 ssyy_i = 0; ssyy_i < ssyy_count; ssyy_i++)
-				{
-					_deconstructor_pattern.parameters.Add(_read_node() as pattern_deconstructor_parameter);
-				}
-			}
 			_deconstructor_pattern.type = _read_node() as type_definition;
+			_deconstructor_pattern.const_params_check = _read_node() as expression;
 		}
 
 
-		public void visit(pattern_deconstructor_parameter _pattern_deconstructor_parameter)
+		public void visit(pattern_parameter _pattern_parameter)
 		{
-			read_pattern_deconstructor_parameter(_pattern_deconstructor_parameter);
+			read_pattern_parameter(_pattern_parameter);
 		}
 
-		public void read_pattern_deconstructor_parameter(pattern_deconstructor_parameter _pattern_deconstructor_parameter)
+		public void read_pattern_parameter(pattern_parameter _pattern_parameter)
 		{
-			read_syntax_tree_node(_pattern_deconstructor_parameter);
+			read_syntax_tree_node(_pattern_parameter);
 		}
 
 
@@ -4101,9 +4128,10 @@ namespace PascalABCCompiler.SyntaxTree
 
 		public void read_var_deconstructor_parameter(var_deconstructor_parameter _var_deconstructor_parameter)
 		{
-			read_pattern_deconstructor_parameter(_var_deconstructor_parameter);
+			read_pattern_parameter(_var_deconstructor_parameter);
 			_var_deconstructor_parameter.identifier = _read_node() as ident;
 			_var_deconstructor_parameter.type = _read_node() as type_definition;
+			_var_deconstructor_parameter.var_keyword_used = br.ReadBoolean();
 		}
 
 
@@ -4114,8 +4142,7 @@ namespace PascalABCCompiler.SyntaxTree
 
 		public void read_recursive_deconstructor_parameter(recursive_deconstructor_parameter _recursive_deconstructor_parameter)
 		{
-			read_pattern_deconstructor_parameter(_recursive_deconstructor_parameter);
-			_recursive_deconstructor_parameter.pattern = _read_node() as pattern_node;
+			read_recursive_pattern_parameter(_recursive_deconstructor_parameter);
 		}
 
 
@@ -4178,6 +4205,156 @@ namespace PascalABCCompiler.SyntaxTree
 			}
 		}
 
+
+		public void visit(const_pattern _const_pattern)
+		{
+			read_const_pattern(_const_pattern);
+		}
+
+		public void read_const_pattern(const_pattern _const_pattern)
+		{
+			read_pattern_node(_const_pattern);
+			_const_pattern.pattern_expressions = _read_node() as expression_list;
+		}
+
+
+		public void visit(tuple_pattern_wild_card _tuple_pattern_wild_card)
+		{
+			read_tuple_pattern_wild_card(_tuple_pattern_wild_card);
+		}
+
+		public void read_tuple_pattern_wild_card(tuple_pattern_wild_card _tuple_pattern_wild_card)
+		{
+			read_pattern_parameter(_tuple_pattern_wild_card);
+		}
+
+
+		public void visit(const_pattern_parameter _const_pattern_parameter)
+		{
+			read_const_pattern_parameter(_const_pattern_parameter);
+		}
+
+		public void read_const_pattern_parameter(const_pattern_parameter _const_pattern_parameter)
+		{
+			read_pattern_parameter(_const_pattern_parameter);
+			_const_pattern_parameter.const_param = _read_node() as expression;
+		}
+
+
+		public void visit(wild_card_deconstructor_parameter _wild_card_deconstructor_parameter)
+		{
+			read_wild_card_deconstructor_parameter(_wild_card_deconstructor_parameter);
+		}
+
+		public void read_wild_card_deconstructor_parameter(wild_card_deconstructor_parameter _wild_card_deconstructor_parameter)
+		{
+			read_pattern_parameter(_wild_card_deconstructor_parameter);
+		}
+
+
+		public void visit(collection_pattern _collection_pattern)
+		{
+			read_collection_pattern(_collection_pattern);
+		}
+
+		public void read_collection_pattern(collection_pattern _collection_pattern)
+		{
+			read_pattern_node(_collection_pattern);
+		}
+
+
+		public void visit(collection_pattern_gap_parameter _collection_pattern_gap_parameter)
+		{
+			read_collection_pattern_gap_parameter(_collection_pattern_gap_parameter);
+		}
+
+		public void read_collection_pattern_gap_parameter(collection_pattern_gap_parameter _collection_pattern_gap_parameter)
+		{
+			read_pattern_parameter(_collection_pattern_gap_parameter);
+		}
+
+
+		public void visit(collection_pattern_wild_card _collection_pattern_wild_card)
+		{
+			read_collection_pattern_wild_card(_collection_pattern_wild_card);
+		}
+
+		public void read_collection_pattern_wild_card(collection_pattern_wild_card _collection_pattern_wild_card)
+		{
+			read_pattern_parameter(_collection_pattern_wild_card);
+		}
+
+
+		public void visit(collection_pattern_var_parameter _collection_pattern_var_parameter)
+		{
+			read_collection_pattern_var_parameter(_collection_pattern_var_parameter);
+		}
+
+		public void read_collection_pattern_var_parameter(collection_pattern_var_parameter _collection_pattern_var_parameter)
+		{
+			read_pattern_parameter(_collection_pattern_var_parameter);
+			_collection_pattern_var_parameter.identifier = _read_node() as ident;
+			_collection_pattern_var_parameter.type = _read_node() as type_definition;
+		}
+
+
+		public void visit(recursive_collection_parameter _recursive_collection_parameter)
+		{
+			read_recursive_collection_parameter(_recursive_collection_parameter);
+		}
+
+		public void read_recursive_collection_parameter(recursive_collection_parameter _recursive_collection_parameter)
+		{
+			read_recursive_pattern_parameter(_recursive_collection_parameter);
+		}
+
+
+		public void visit(recursive_pattern_parameter _recursive_pattern_parameter)
+		{
+			read_recursive_pattern_parameter(_recursive_pattern_parameter);
+		}
+
+		public void read_recursive_pattern_parameter(recursive_pattern_parameter _recursive_pattern_parameter)
+		{
+			read_pattern_parameter(_recursive_pattern_parameter);
+			_recursive_pattern_parameter.pattern = _read_node() as pattern_node;
+		}
+
+
+		public void visit(tuple_pattern _tuple_pattern)
+		{
+			read_tuple_pattern(_tuple_pattern);
+		}
+
+		public void read_tuple_pattern(tuple_pattern _tuple_pattern)
+		{
+			read_pattern_node(_tuple_pattern);
+		}
+
+
+		public void visit(tuple_pattern_var_parameter _tuple_pattern_var_parameter)
+		{
+			read_tuple_pattern_var_parameter(_tuple_pattern_var_parameter);
+		}
+
+		public void read_tuple_pattern_var_parameter(tuple_pattern_var_parameter _tuple_pattern_var_parameter)
+		{
+			read_pattern_parameter(_tuple_pattern_var_parameter);
+			_tuple_pattern_var_parameter.identifier = _read_node() as ident;
+			_tuple_pattern_var_parameter.type = _read_node() as type_definition;
+		}
+
+
+		public void visit(recursive_tuple_parameter _recursive_tuple_parameter)
+		{
+			read_recursive_tuple_parameter(_recursive_tuple_parameter);
+		}
+
+		public void read_recursive_tuple_parameter(recursive_tuple_parameter _recursive_tuple_parameter)
+		{
+			read_recursive_pattern_parameter(_recursive_tuple_parameter);
+		}
+
 	}
 
 

SyntaxTree/tree/SyntaxTreeStreamWriter.cs

@@ -6188,6 +6188,27 @@ namespace PascalABCCompiler.SyntaxTree
 		public void write_pattern_node(pattern_node _pattern_node)
 		{
 			write_syntax_tree_node(_pattern_node);
+			if (_pattern_node.parameters == null)
+			{
+				bw.Write((byte)0);
+			}
+			else
+			{
+				bw.Write((byte)1);
+				bw.Write(_pattern_node.parameters.Count);
+				for(Int32 ssyy_i = 0; ssyy_i < _pattern_node.parameters.Count; ssyy_i++)
+				{
+					if (_pattern_node.parameters[ssyy_i] == null)
+					{
+						bw.Write((byte)0);
+					}
+					else
+					{
+						bw.Write((byte)1);
+						_pattern_node.parameters[ssyy_i].visit(this);
+					}
+				}
+			}
 		}
 
 
@@ -6371,27 +6392,6 @@ namespace PascalABCCompiler.SyntaxTree
 		public void write_deconstructor_pattern(deconstructor_pattern _deconstructor_pattern)
 		{
 			write_pattern_node(_deconstructor_pattern);
-			if (_deconstructor_pattern.parameters == null)
-			{
-				bw.Write((byte)0);
-			}
-			else
-			{
-				bw.Write((byte)1);
-				bw.Write(_deconstructor_pattern.parameters.Count);
-				for(Int32 ssyy_i = 0; ssyy_i < _deconstructor_pattern.parameters.Count; ssyy_i++)
-				{
-					if (_deconstructor_pattern.parameters[ssyy_i] == null)
-					{
-						bw.Write((byte)0);
-					}
-					else
-					{
-						bw.Write((byte)1);
-						_deconstructor_pattern.parameters[ssyy_i].visit(this);
-					}
-				}
-			}
 			if (_deconstructor_pattern.type == null)
 			{
 				bw.Write((byte)0);
@@ -6401,18 +6401,27 @@ namespace PascalABCCompiler.SyntaxTree
 				bw.Write((byte)1);
 				_deconstructor_pattern.type.visit(this);
 			}
+			if (_deconstructor_pattern.const_params_check == null)
+			{
+				bw.Write((byte)0);
+			}
+			else
+			{
+				bw.Write((byte)1);
+				_deconstructor_pattern.const_params_check.visit(this);
+			}
 		}
 
 
-		public void visit(pattern_deconstructor_parameter _pattern_deconstructor_parameter)
+		public void visit(pattern_parameter _pattern_parameter)
 		{
 			bw.Write((Int16)229);
-			write_pattern_deconstructor_parameter(_pattern_deconstructor_parameter);
+			write_pattern_parameter(_pattern_parameter);
 		}
 
-		public void write_pattern_deconstructor_parameter(pattern_deconstructor_parameter _pattern_deconstructor_parameter)
+		public void write_pattern_parameter(pattern_parameter _pattern_parameter)
 		{
-			write_syntax_tree_node(_pattern_deconstructor_parameter);
+			write_syntax_tree_node(_pattern_parameter);
 		}
 
 
@@ -6454,7 +6463,7 @@ namespace PascalABCCompiler.SyntaxTree
 
 		public void write_var_deconstructor_parameter(var_deconstructor_parameter _var_deconstructor_parameter)
 		{
-			write_pattern_deconstructor_parameter(_var_deconstructor_parameter);
+			write_pattern_parameter(_var_deconstructor_parameter);
 			if (_var_deconstructor_parameter.identifier == null)
 			{
 				bw.Write((byte)0);
@@ -6473,6 +6482,7 @@ namespace PascalABCCompiler.SyntaxTree
 				bw.Write((byte)1);
 				_var_deconstructor_parameter.type.visit(this);
 			}
+			bw.Write(_var_deconstructor_parameter.var_keyword_used);
 		}
 
 
@@ -6484,16 +6494,7 @@ namespace PascalABCCompiler.SyntaxTree
 
 		public void write_recursive_deconstructor_parameter(recursive_deconstructor_parameter _recursive_deconstructor_parameter)
 		{
-			write_pattern_deconstructor_parameter(_recursive_deconstructor_parameter);
-			if (_recursive_deconstructor_parameter.pattern == null)
-			{
-				bw.Write((byte)0);
-			}
-			else
-			{
-				bw.Write((byte)1);
-				_recursive_deconstructor_parameter.pattern.visit(this);
-			}
+			write_recursive_pattern_parameter(_recursive_deconstructor_parameter);
 		}
 
 
@@ -6575,6 +6576,225 @@ namespace PascalABCCompiler.SyntaxTree
 			}
 		}
 
+
+		public void visit(const_pattern _const_pattern)
+		{
+			bw.Write((Int16)236);
+			write_const_pattern(_const_pattern);
+		}
+
+		public void write_const_pattern(const_pattern _const_pattern)
+		{
+			write_pattern_node(_const_pattern);
+			if (_const_pattern.pattern_expressions == null)
+			{
+				bw.Write((byte)0);
+			}
+			else
+			{
+				bw.Write((byte)1);
+				_const_pattern.pattern_expressions.visit(this);
+			}
+		}
+
+
+		public void visit(tuple_pattern_wild_card _tuple_pattern_wild_card)
+		{
+			bw.Write((Int16)237);
+			write_tuple_pattern_wild_card(_tuple_pattern_wild_card);
+		}
+
+		public void write_tuple_pattern_wild_card(tuple_pattern_wild_card _tuple_pattern_wild_card)
+		{
+			write_pattern_parameter(_tuple_pattern_wild_card);
+		}
+
+
+		public void visit(const_pattern_parameter _const_pattern_parameter)
+		{
+			bw.Write((Int16)238);
+			write_const_pattern_parameter(_const_pattern_parameter);
+		}
+
+		public void write_const_pattern_parameter(const_pattern_parameter _const_pattern_parameter)
+		{
+			write_pattern_parameter(_const_pattern_parameter);
+			if (_const_pattern_parameter.const_param == null)
+			{
+				bw.Write((byte)0);
+			}
+			else
+			{
+				bw.Write((byte)1);
+				_const_pattern_parameter.const_param.visit(this);
+			}
+		}
+
+
+		public void visit(wild_card_deconstructor_parameter _wild_card_deconstructor_parameter)
+		{
+			bw.Write((Int16)239);
+			write_wild_card_deconstructor_parameter(_wild_card_deconstructor_parameter);
+		}
+
+		public void write_wild_card_deconstructor_parameter(wild_card_deconstructor_parameter _wild_card_deconstructor_parameter)
+		{
+			write_pattern_parameter(_wild_card_deconstructor_parameter);
+		}
+
+
+		public void visit(collection_pattern _collection_pattern)
+		{
+			bw.Write((Int16)240);
+			write_collection_pattern(_collection_pattern);
+		}
+
+		public void write_collection_pattern(collection_pattern _collection_pattern)
+		{
+			write_pattern_node(_collection_pattern);
+		}
+
+
+		public void visit(collection_pattern_gap_parameter _collection_pattern_gap_parameter)
+		{
+			bw.Write((Int16)241);
+			write_collection_pattern_gap_parameter(_collection_pattern_gap_parameter);
+		}
+
+		public void write_collection_pattern_gap_parameter(collection_pattern_gap_parameter _collection_pattern_gap_parameter)
+		{
+			write_pattern_parameter(_collection_pattern_gap_parameter);
+		}
+
+
+		public void visit(collection_pattern_wild_card _collection_pattern_wild_card)
+		{
+			bw.Write((Int16)242);
+			write_collection_pattern_wild_card(_collection_pattern_wild_card);
+		}
+
+		public void write_collection_pattern_wild_card(collection_pattern_wild_card _collection_pattern_wild_card)
+		{
+			write_pattern_parameter(_collection_pattern_wild_card);
+		}
+
+
+		public void visit(collection_pattern_var_parameter _collection_pattern_var_parameter)
+		{
+			bw.Write((Int16)243);
+			write_collection_pattern_var_parameter(_collection_pattern_var_parameter);
+		}
+
+		public void write_collection_pattern_var_parameter(collection_pattern_var_parameter _collection_pattern_var_parameter)
+		{
+			write_pattern_parameter(_collection_pattern_var_parameter);
+			if (_collection_pattern_var_parameter.identifier == null)
+			{
+				bw.Write((byte)0);
+			}
+			else
+			{
+				bw.Write((byte)1);
+				_collection_pattern_var_parameter.identifier.visit(this);
+			}
+			if (_collection_pattern_var_parameter.type == null)
+			{
+				bw.Write((byte)0);
+			}
+			else
+			{
+				bw.Write((byte)1);
+				_collection_pattern_var_parameter.type.visit(this);
+			}
+		}
+
+
+		public void visit(recursive_collection_parameter _recursive_collection_parameter)
+		{
+			bw.Write((Int16)244);
+			write_recursive_collection_parameter(_recursive_collection_parameter);
+		}
+
+		public void write_recursive_collection_parameter(recursive_collection_parameter _recursive_collection_parameter)
+		{
+			write_recursive_pattern_parameter(_recursive_collection_parameter);
+		}
+
+
+		public void visit(recursive_pattern_parameter _recursive_pattern_parameter)
+		{
+			bw.Write((Int16)245);
+			write_recursive_pattern_parameter(_recursive_pattern_parameter);
+		}
+
+		public void write_recursive_pattern_parameter(recursive_pattern_parameter _recursive_pattern_parameter)
+		{
+			write_pattern_parameter(_recursive_pattern_parameter);
+			if (_recursive_pattern_parameter.pattern == null)
+			{
+				bw.Write((byte)0);
+			}
+			else
+			{
+				bw.Write((byte)1);
+				_recursive_pattern_parameter.pattern.visit(this);
+			}
+		}
+
+
+		public void visit(tuple_pattern _tuple_pattern)
+		{
+			bw.Write((Int16)246);
+			write_tuple_pattern(_tuple_pattern);
+		}
+
+		public void write_tuple_pattern(tuple_pattern _tuple_pattern)
+		{
+			write_pattern_node(_tuple_pattern);
+		}
+
+
+		public void visit(tuple_pattern_var_parameter _tuple_pattern_var_parameter)
+		{
+			bw.Write((Int16)247);
+			write_tuple_pattern_var_parameter(_tuple_pattern_var_parameter);
+		}
+
+		public void write_tuple_pattern_var_parameter(tuple_pattern_var_parameter _tuple_pattern_var_parameter)
+		{
+			write_pattern_parameter(_tuple_pattern_var_parameter);
+			if (_tuple_pattern_var_parameter.identifier == null)
+			{
+				bw.Write((byte)0);
+			}
+			else
+			{
+				bw.Write((byte)1);
+				_tuple_pattern_var_parameter.identifier.visit(this);
+			}
+			if (_tuple_pattern_var_parameter.type == null)
+			{
+				bw.Write((byte)0);
+			}
+			else
+			{
+				bw.Write((byte)1);
+				_tuple_pattern_var_parameter.type.visit(this);
+			}
+		}
+
+
+		public void visit(recursive_tuple_parameter _recursive_tuple_parameter)
+		{
+			bw.Write((Int16)248);
+			write_recursive_tuple_parameter(_recursive_tuple_parameter);
+		}
+
+		public void write_recursive_tuple_parameter(recursive_tuple_parameter _recursive_tuple_parameter)
+		{
+			write_recursive_pattern_parameter(_recursive_tuple_parameter);
+		}
+
 	}
 
 

SyntaxTree/tree/TreeHelper.cs

@@ -33,7 +33,7 @@ namespace PascalABCCompiler.SyntaxTree
         DirectDescendants
     }
 
-    public enum SemanticCheckType { MatchedExpression, MatchedExpressionAndType }
+    public enum SemanticCheckType { MatchedExpression, MatchedExpressionAndType, MatchedExpressionAndExpression, MatchedTuple }
 
     public partial class syntax_tree_node
     {
@@ -393,6 +393,11 @@ namespace PascalABCCompiler.SyntaxTree
             return new bin_expr(left, right, Operators.LogicalAND);
         }
 
+        public static bin_expr LogicalOr(expression left, expression right)
+        {
+            return new bin_expr(left, right, Operators.LogicalOR);
+        }
+
         public override string ToString()
         {
             return string.Format("{0} {2} {1}", left, right, OperatorServices.ToString(operation_type, LanguageId.PascalABCNET));
@@ -1093,8 +1098,8 @@ namespace PascalABCCompiler.SyntaxTree
 
     public partial class simple_property
     {
-        public simple_property(ident name, type_definition type, property_accessors accessors, SourceContext sc = null) 
-            : this(name, type, null, accessors, null, null, definition_attribute.None,proc_attribute.attr_none,false, null, sc)
+        public simple_property(ident name, type_definition type, property_accessors accessors, SourceContext sc = null)
+            : this(name, type, null, accessors, null, null, definition_attribute.None, proc_attribute.attr_none, false, null, sc)
         { }
     }
 
@@ -1709,7 +1714,7 @@ namespace PascalABCCompiler.SyntaxTree
 
     public partial class expression
     {
-        //public object semantic_ex;
+        //public object semantic_ex; 
         public expression Plus(expression e)
         {
             return new bin_expr(this, e, Operators.Plus);
@@ -1814,19 +1819,12 @@ namespace PascalABCCompiler.SyntaxTree
 
     public partial class deconstructor_pattern
     {
-        public bool IsRecursive => parameters.Any(x => x is recursive_deconstructor_parameter);
-
         public override string ToString() => $"{type}({string.Join(", ", parameters.Select(x => x.ToString()))})";
     }
 
-    public partial class var_deconstructor_parameter
+    public partial class pattern_node
     {
-        public override string ToString() => identifier.ToString() + (type == null ? "" : $": {type}");
-    }
-
-    public partial class recursive_deconstructor_parameter
-    {
-        public override string ToString() => pattern.ToString();
+        public bool IsRecursive => parameters.Any(x => x is recursive_pattern_parameter);
     }
 
     public partial class typecast_node
@@ -1842,5 +1840,58 @@ namespace PascalABCCompiler.SyntaxTree
         public bool visited = false;
     }
 
+    public partial class var_deconstructor_parameter
+    {
+        public override string ToString() => identifier.ToString() + (type == null ? "" : $": {type}");
     }
 
+    public partial class recursive_deconstructor_parameter
+    {
+        public override string ToString() => pattern.ToString();
+    }
+
+    public partial class tuple_pattern_wild_card
+    {
+        ///<summary>
+        ///Конструктор c параметрами
+        ///</summary>
+        public tuple_pattern_wild_card(SourceContext sc)
+        {
+            this.source_context = sc;
+        }
+    }
+
+    public partial class collection_pattern_wild_card
+    {
+        ///<summary>
+        ///Конструктор c параметрами
+        ///</summary>
+        public collection_pattern_wild_card(SourceContext sc)
+        {
+            this.source_context = sc;
+        }
+    }
+
+    public partial class collection_pattern_gap_parameter
+    {
+        ///<summary>
+        ///Конструктор c параметрами
+        ///</summary>
+        public collection_pattern_gap_parameter(SourceContext sc)
+        {
+            this.source_context = sc;
+        }
+    }
+
+    public partial class wild_card_deconstructor_parameter
+    {
+        ///<summary>
+        ///Конструктор c параметрами
+        ///</summary>
+        public wild_card_deconstructor_parameter(SourceContext sc)
+        {
+            this.source_context = sc;
+        }
+    }
+}
+

SyntaxTree/tree/Visitor.cs

@@ -1379,11 +1379,11 @@ namespace PascalABCCompiler.SyntaxTree
 		///<returns> Return value is void </returns>
 		void visit(deconstructor_pattern _deconstructor_pattern);
 		///<summary>
-		///Method to visit pattern_deconstructor_parameter.
+		///Method to visit pattern_parameter.
 		///</summary>
-		///<param name="_pattern_deconstructor_parameter">Node to visit</param>
+		///<param name="_pattern_parameter">Node to visit</param>
 		///<returns> Return value is void </returns>
-		void visit(pattern_deconstructor_parameter _pattern_deconstructor_parameter);
+		void visit(pattern_parameter _pattern_parameter);
 		///<summary>
 		///Method to visit desugared_deconstruction.
 		///</summary>
@@ -1420,6 +1420,84 @@ namespace PascalABCCompiler.SyntaxTree
 		///<param name="_semantic_check_sugared_var_def_statement_node">Node to visit</param>
 		///<returns> Return value is void </returns>
 		void visit(semantic_check_sugared_var_def_statement_node _semantic_check_sugared_var_def_statement_node);
+		///<summary>
+		///Method to visit const_pattern.
+		///</summary>
+		///<param name="_const_pattern">Node to visit</param>
+		///<returns> Return value is void </returns>
+		void visit(const_pattern _const_pattern);
+		///<summary>
+		///Method to visit tuple_pattern_wild_card.
+		///</summary>
+		///<param name="_tuple_pattern_wild_card">Node to visit</param>
+		///<returns> Return value is void </returns>
+		void visit(tuple_pattern_wild_card _tuple_pattern_wild_card);
+		///<summary>
+		///Method to visit const_pattern_parameter.
+		///</summary>
+		///<param name="_const_pattern_parameter">Node to visit</param>
+		///<returns> Return value is void </returns>
+		void visit(const_pattern_parameter _const_pattern_parameter);
+		///<summary>
+		///Method to visit wild_card_deconstructor_parameter.
+		///</summary>
+		///<param name="_wild_card_deconstructor_parameter">Node to visit</param>
+		///<returns> Return value is void </returns>
+		void visit(wild_card_deconstructor_parameter _wild_card_deconstructor_parameter);
+		///<summary>
+		///Method to visit collection_pattern.
+		///</summary>
+		///<param name="_collection_pattern">Node to visit</param>
+		///<returns> Return value is void </returns>
+		void visit(collection_pattern _collection_pattern);
+		///<summary>
+		///Method to visit collection_pattern_gap_parameter.
+		///</summary>
+		///<param name="_collection_pattern_gap_parameter">Node to visit</param>
+		///<returns> Return value is void </returns>
+		void visit(collection_pattern_gap_parameter _collection_pattern_gap_parameter);
+		///<summary>
+		///Method to visit collection_pattern_wild_card.
+		///</summary>
+		///<param name="_collection_pattern_wild_card">Node to visit</param>
+		///<returns> Return value is void </returns>
+		void visit(collection_pattern_wild_card _collection_pattern_wild_card);
+		///<summary>
+		///Method to visit collection_pattern_var_parameter.
+		///</summary>
+		///<param name="_collection_pattern_var_parameter">Node to visit</param>
+		///<returns> Return value is void </returns>
+		void visit(collection_pattern_var_parameter _collection_pattern_var_parameter);
+		///<summary>
+		///Method to visit recursive_collection_parameter.
+		///</summary>
+		///<param name="_recursive_collection_parameter">Node to visit</param>
+		///<returns> Return value is void </returns>
+		void visit(recursive_collection_parameter _recursive_collection_parameter);
+		///<summary>
+		///Method to visit recursive_pattern_parameter.
+		///</summary>
+		///<param name="_recursive_pattern_parameter">Node to visit</param>
+		///<returns> Return value is void </returns>
+		void visit(recursive_pattern_parameter _recursive_pattern_parameter);
+		///<summary>
+		///Method to visit tuple_pattern.
+		///</summary>
+		///<param name="_tuple_pattern">Node to visit</param>
+		///<returns> Return value is void </returns>
+		void visit(tuple_pattern _tuple_pattern);
+		///<summary>
+		///Method to visit tuple_pattern_var_parameter.
+		///</summary>
+		///<param name="_tuple_pattern_var_parameter">Node to visit</param>
+		///<returns> Return value is void </returns>
+		void visit(tuple_pattern_var_parameter _tuple_pattern_var_parameter);
+		///<summary>
+		///Method to visit recursive_tuple_parameter.
+		///</summary>
+		///<param name="_recursive_tuple_parameter">Node to visit</param>
+		///<returns> Return value is void </returns>
+		void visit(recursive_tuple_parameter _recursive_tuple_parameter);
 	}
 
 

SyntaxTree/tree/tree.xml

@@ -2865,7 +2865,9 @@
       </Tags>
     </SyntaxNode>
     <SyntaxNode Name="pattern_node" BaseName="syntax_tree_node">
-      <Fields />
+      <Fields>
+        <ExtendedField Name="parameters" Type="List&lt;pattern_parameter&gt;" CreateVariable="true" DeleteVariable="false" />
+      </Fields>
       <Methods />
       <Tags>
         <CategoryIndices>
@@ -2954,8 +2956,8 @@
     </SyntaxNode>
     <SyntaxNode Name="deconstructor_pattern" BaseName="pattern_node">
       <Fields>
-        <ExtendedField Name="parameters" Type="List&lt;pattern_deconstructor_parameter&gt;" CreateVariable="true" DeleteVariable="false" />
         <SyntaxField Name="type" SyntaxType="type_definition" />
+        <SyntaxField Name="const_params_check" SyntaxType="expression" />
       </Fields>
       <Methods />
       <Tags>
@@ -2967,7 +2969,7 @@
         </TagIndices>
       </Tags>
     </SyntaxNode>
-    <SyntaxNode Name="pattern_deconstructor_parameter" BaseName="syntax_tree_node">
+    <SyntaxNode Name="pattern_parameter" BaseName="syntax_tree_node">
       <Fields />
       <Methods />
       <Tags>
@@ -2994,10 +2996,11 @@
         </TagIndices>
       </Tags>
     </SyntaxNode>
-    <SyntaxNode Name="var_deconstructor_parameter" BaseName="pattern_deconstructor_parameter">
+    <SyntaxNode Name="var_deconstructor_parameter" BaseName="pattern_parameter">
       <Fields>
         <SyntaxField Name="identifier" SyntaxType="ident" />
         <SyntaxField Name="type" SyntaxType="type_definition" />
+        <ExtendedField Name="var_keyword_used" Type="bool" CreateVariable="false" DeleteVariable="false" />
       </Fields>
       <Methods />
       <Tags>
@@ -3009,10 +3012,8 @@
         </TagIndices>
       </Tags>
     </SyntaxNode>
-    <SyntaxNode Name="recursive_deconstructor_parameter" BaseName="pattern_deconstructor_parameter">
-      <Fields>
-        <SyntaxField Name="pattern" SyntaxType="pattern_node" />
-      </Fields>
+    <SyntaxNode Name="recursive_deconstructor_parameter" BaseName="recursive_pattern_parameter">
+      <Fields />
       <Methods />
       <Tags>
         <CategoryIndices>
@@ -3056,6 +3057,174 @@
         <TagIndices />
       </Tags>
     </SyntaxNode>
+    <SyntaxNode Name="const_pattern" BaseName="pattern_node">
+      <Fields>
+        <SyntaxField Name="pattern_expressions" SyntaxType="expression_list" />
+      </Fields>
+      <Methods />
+      <Tags>
+        <CategoryIndices>
+          <CategoryIndex>0</CategoryIndex>
+        </CategoryIndices>
+        <TagIndices>
+          <TagIndex>9</TagIndex>
+        </TagIndices>
+      </Tags>
+    </SyntaxNode>
+    <SyntaxNode Name="tuple_pattern_wild_card" BaseName="pattern_parameter">
+      <Fields />
+      <Methods />
+      <Tags>
+        <CategoryIndices>
+          <CategoryIndex>0</CategoryIndex>
+        </CategoryIndices>
+        <TagIndices>
+          <TagIndex>9</TagIndex>
+        </TagIndices>
+      </Tags>
+    </SyntaxNode>
+    <SyntaxNode Name="const_pattern_parameter" BaseName="pattern_parameter">
+      <Fields>
+        <SyntaxField Name="const_param" SyntaxType="expression" />
+      </Fields>
+      <Methods />
+      <Tags>
+        <CategoryIndices>
+          <CategoryIndex>0</CategoryIndex>
+        </CategoryIndices>
+        <TagIndices>
+          <TagIndex>9</TagIndex>
+        </TagIndices>
+      </Tags>
+    </SyntaxNode>
+    <SyntaxNode Name="wild_card_deconstructor_parameter" BaseName="pattern_parameter">
+      <Fields />
+      <Methods />
+      <Tags>
+        <CategoryIndices>
+          <CategoryIndex>0</CategoryIndex>
+        </CategoryIndices>
+        <TagIndices>
+          <TagIndex>9</TagIndex>
+        </TagIndices>
+      </Tags>
+    </SyntaxNode>
+    <SyntaxNode Name="collection_pattern" BaseName="pattern_node">
+      <Fields />
+      <Methods />
+      <Tags>
+        <CategoryIndices>
+          <CategoryIndex>0</CategoryIndex>
+        </CategoryIndices>
+        <TagIndices>
+          <TagIndex>9</TagIndex>
+        </TagIndices>
+      </Tags>
+    </SyntaxNode>
+    <SyntaxNode Name="collection_pattern_gap_parameter" BaseName="pattern_parameter">
+      <Fields />
+      <Methods />
+      <Tags>
+        <CategoryIndices>
+          <CategoryIndex>0</CategoryIndex>
+        </CategoryIndices>
+        <TagIndices>
+          <TagIndex>9</TagIndex>
+        </TagIndices>
+      </Tags>
+    </SyntaxNode>
+    <SyntaxNode Name="collection_pattern_wild_card" BaseName="pattern_parameter">
+      <Fields />
+      <Methods />
+      <Tags>
+        <CategoryIndices>
+          <CategoryIndex>0</CategoryIndex>
+        </CategoryIndices>
+        <TagIndices>
+          <TagIndex>9</TagIndex>
+        </TagIndices>
+      </Tags>
+    </SyntaxNode>
+    <SyntaxNode Name="collection_pattern_var_parameter" BaseName="pattern_parameter">
+      <Fields>
+        <SyntaxField Name="identifier" SyntaxType="ident" />
+        <SyntaxField Name="type" SyntaxType="type_definition" />
+      </Fields>
+      <Methods />
+      <Tags>
+        <CategoryIndices>
+          <CategoryIndex>0</CategoryIndex>
+        </CategoryIndices>
+        <TagIndices>
+          <TagIndex>9</TagIndex>
+        </TagIndices>
+      </Tags>
+    </SyntaxNode>
+    <SyntaxNode Name="recursive_collection_parameter" BaseName="recursive_pattern_parameter">
+      <Fields />
+      <Methods />
+      <Tags>
+        <CategoryIndices>
+          <CategoryIndex>0</CategoryIndex>
+        </CategoryIndices>
+        <TagIndices>
+          <TagIndex>9</TagIndex>
+        </TagIndices>
+      </Tags>
+    </SyntaxNode>
+    <SyntaxNode Name="recursive_pattern_parameter" BaseName="pattern_parameter">
+      <Fields>
+        <SyntaxField Name="pattern" SyntaxType="pattern_node" />
+      </Fields>
+      <Methods />
+      <Tags>
+        <CategoryIndices>
+          <CategoryIndex>0</CategoryIndex>
+        </CategoryIndices>
+        <TagIndices>
+          <TagIndex>9</TagIndex>
+        </TagIndices>
+      </Tags>
+    </SyntaxNode>
+    <SyntaxNode Name="tuple_pattern" BaseName="pattern_node">
+      <Fields />
+      <Methods />
+      <Tags>
+        <CategoryIndices>
+          <CategoryIndex>0</CategoryIndex>
+        </CategoryIndices>
+        <TagIndices>
+          <TagIndex>9</TagIndex>
+        </TagIndices>
+      </Tags>
+    </SyntaxNode>
+    <SyntaxNode Name="tuple_pattern_var_parameter" BaseName="pattern_parameter">
+      <Fields>
+        <SyntaxField Name="identifier" SyntaxType="ident" />
+        <SyntaxField Name="type" SyntaxType="type_definition" />
+      </Fields>
+      <Methods />
+      <Tags>
+        <CategoryIndices>
+          <CategoryIndex>0</CategoryIndex>
+        </CategoryIndices>
+        <TagIndices>
+          <TagIndex>9</TagIndex>
+        </TagIndices>
+      </Tags>
+    </SyntaxNode>
+    <SyntaxNode Name="recursive_tuple_parameter" BaseName="recursive_pattern_parameter">
+      <Fields />
+      <Methods />
+      <Tags>
+        <CategoryIndices>
+          <CategoryIndex>0</CategoryIndex>
+        </CategoryIndices>
+        <TagIndices>
+          <TagIndex>9</TagIndex>
+        </TagIndices>
+      </Tags>
+    </SyntaxNode>
   </SyntaxNodes>
   <Settings>
     <FileName>Tree.cs</FileName>
@@ -3081,7 +3250,7 @@
         <Tag Name="Важнейшие" ReferenceCount="207" />
         <Tag Name="Method_Procedure_Call" ReferenceCount="2" />
         <Tag Name="Yield" ReferenceCount="8" />
-        <Tag Name="Patterns" ReferenceCount="12" />
+        <Tag Name="Patterns" ReferenceCount="25" />
         <Tag Name="Typeclasses" ReferenceCount="13" />
       </Tags>
     </FilterCategory>
@@ -3118,6 +3287,8 @@
       <HelpData Key=".from" Value="" />
       <HelpData Key=".guardstats" Value="" />
       <HelpData Key=".handlers" Value="" />
+      <HelpData Key=".i" Value="" />
+      <HelpData Key=".item_expression" Value="" />
       <HelpData Key=".left" Value="" />
       <HelpData Key=".lists" Value="" />
       <HelpData Key=".listunitsections" Value="" />
@@ -3132,6 +3303,7 @@
       <HelpData Key=".parameters" Value="" />
       <HelpData Key=".params" Value="" />
       <HelpData Key=".pattern" Value="" />
+      <HelpData Key=".pattern_expression" Value="" />
       <HelpData Key=".procdef" Value="" />
       <HelpData Key=".res" Value="" />
       <HelpData Key=".restriction" Value="" />
@@ -3328,6 +3500,17 @@
       <HelpData Key="class_predefinition.class_name" Value="" />
       <HelpData Key="closure_substituting_node" Value="" />
       <HelpData Key="closure_substituting_node.substitution" Value="" />
+      <HelpData Key="collection_pattern" Value="" />
+      <HelpData Key="collection_pattern.collection_items" Value="" />
+      <HelpData Key="collection_pattern_expr_item" Value="" />
+      <HelpData Key="collection_pattern_expr_item.item_expression" Value="" />
+      <HelpData Key="collection_pattern_gap_item" Value="" />
+      <HelpData Key="collection_pattern_gap_parameter" Value="" />
+      <HelpData Key="collection_pattern_item" Value="" />
+      <HelpData Key="collection_pattern_var_parameter" Value="Возможно без типа" />
+      <HelpData Key="collection_pattern_var_parameter.identifier" Value="" />
+      <HelpData Key="collection_pattern_var_parameter.type" Value="" />
+      <HelpData Key="collection_pattern_wild_card" Value="" />
       <HelpData Key="compilation_unit" Value="" />
       <HelpData Key="compilation_unit." Value="" />
       <HelpData Key="compilation_unit.Language" Value="" />
@@ -3346,6 +3529,10 @@
       <HelpData Key="compiler_directive_list.compiler_directive_list Add(compiler_directive _compiler_directive, SourceContext sc)" Value="" />
       <HelpData Key="compiler_directive_list.compiler_directive_list(compiler_directive _compiler_directive, SourceContext sc)" Value="" />
       <HelpData Key="compiler_directive_list.directives" Value="" />
+      <HelpData Key="const_deconstructor_parameter" Value="" />
+      <HelpData Key="const_deconstructor_parameter.const_param" Value="" />
+      <HelpData Key="const_deconstructor_parameter.i" Value="" />
+      <HelpData Key="const_deconstructor_parameter.value" Value="" />
       <HelpData Key="const_definition" Value="" />
       <HelpData Key="const_definition.const_name" Value="" />
       <HelpData Key="const_definition.const_value" Value="" />
@@ -3356,6 +3543,11 @@
       <HelpData Key="const_method_call.parametres" Value="" />
       <HelpData Key="const_method_call.unit_name" Value="" />
       <HelpData Key="const_node" Value="Константа" />
+      <HelpData Key="const_pattern" Value="паттерн для константного матчинга" />
+      <HelpData Key="const_pattern.pattern_expression" Value="" />
+      <HelpData Key="const_pattern.pattern_expressions" Value="" />
+      <HelpData Key="const_pattern_parameter" Value="" />
+      <HelpData Key="const_pattern_parameter.const_param" Value="" />
       <HelpData Key="constructor" Value="" />
       <HelpData Key="constructor.constructor(formal_parameters fp): this(fp, null)" Value="" />
       <HelpData Key="constructor.constructor(formal_parameters fp,SourceContext sc): this(null, fp, new procedure_attributes_list(proc_attribute.attr_overload), null, false, false, null, null)" Value="" />
@@ -3393,6 +3585,7 @@
       <HelpData Key="deconstruction_variables_definition" Value="Список объявлений для deconstructor pattern" />
       <HelpData Key="deconstruction_variables_definition.definitions" Value="" />
       <HelpData Key="deconstructor_pattern" Value="" />
+      <HelpData Key="deconstructor_pattern.const_params_check" Value="Проверка соответствия для константных параметрах деконструирования" />
       <HelpData Key="deconstructor_pattern.parameters" Value="Результат деконструирования" />
       <HelpData Key="deconstructor_pattern.type" Value="Деконструируемый тип" />
       <HelpData Key="default_indexer_property_node" Value="" />
@@ -3512,6 +3705,8 @@
       <HelpData Key="exception_identifier.type_name" Value="" />
       <HelpData Key="exception_identifier.variable" Value="" />
       <HelpData Key="exit_directive" Value="" />
+      <HelpData Key="expr_collection_pattern_item" Value="" />
+      <HelpData Key="expr_collection_pattern_item.item_expression" Value="" />
       <HelpData Key="expression" Value="Выражение" />
       <HelpData Key="expression." Value="" />
       <HelpData Key="expression_as_statement" Value="" />
@@ -3706,6 +3901,7 @@
       <HelpData Key="interface_node.uses_modules" Value="" />
       <HelpData Key="interface_node.using_namespaces" Value="" />
       <HelpData Key="is_pattern_expr" Value="" />
+      <HelpData Key="is_pattern_expr.constDeconstructorParamCheck" Value="" />
       <HelpData Key="is_pattern_expr.left" Value="" />
       <HelpData Key="is_pattern_expr.right" Value="" />
       <HelpData Key="jump_stmt" Value="" />
@@ -3936,6 +4132,8 @@
       <HelpData Key="pattern_deconstructor_parameter.name" Value="" />
       <HelpData Key="pattern_deconstructor_parameter.type" Value="" />
       <HelpData Key="pattern_node" Value="" />
+      <HelpData Key="pattern_node.parameters" Value="" />
+      <HelpData Key="pattern_parameter" Value="Базовый класс параметра для pattern_node" />
       <HelpData Key="proc_block" Value="" />
       <HelpData Key="procedure_attribute" Value="" />
       <HelpData Key="procedure_attribute.attribute_type" Value="" />
@@ -4078,8 +4276,15 @@
       <HelpData Key="record_type_parts" Value="" />
       <HelpData Key="record_type_parts.fixed_part" Value="" />
       <HelpData Key="record_type_parts.variant_part" Value="" />
+      <HelpData Key="recursive_collection_parameter" Value="Рекурсивный паттерн-параметр. " />
+      <HelpData Key="recursive_collection_parameter.pattern" Value="" />
+      <HelpData Key="recursive_collection_pattern" Value="Рекурсивный паттерн-параметр. " />
+      <HelpData Key="recursive_collection_pattern.pattern" Value="" />
       <HelpData Key="recursive_deconstructor_parameter" Value="Параметр-паттерн. Часть рекурсивного паттерна." />
       <HelpData Key="recursive_deconstructor_parameter.pattern" Value="" />
+      <HelpData Key="recursive_pattern_parameter" Value="Рекурсивный паттерн-параметр." />
+      <HelpData Key="recursive_pattern_parameter.pattern" Value="" />
+      <HelpData Key="recursive_tuple_parameter" Value="Рекурсивный паттерн-параметр." />
       <HelpData Key="ref_type" Value="" />
       <HelpData Key="ref_type.pointed_to" Value="" />
       <HelpData Key="repeat_node" Value="Цикл с постусловием (repeat)" />
@@ -4280,6 +4485,12 @@
       <HelpData Key="tuple_node.el" Value="" />
       <HelpData Key="tuple_node_for_formatter" Value="" />
       <HelpData Key="tuple_node_for_formatter.el" Value="" />
+      <HelpData Key="tuple_pattern" Value="" />
+      <HelpData Key="tuple_pattern_var_parameter" Value="" />
+      <HelpData Key="tuple_pattern_var_parameter.identifier" Value="" />
+      <HelpData Key="tuple_pattern_var_parameter.type" Value="" />
+      <HelpData Key="tuple_pattern_wild_card" Value="" />
+      <HelpData Key="tuple_wild_card" Value="" />
       <HelpData Key="type_declaration" Value="" />
       <HelpData Key="type_declaration.type_declaration(string name, type_definition type): this(new ident(name),type)" Value="" />
       <HelpData Key="type_declaration.type_declaration(string name, type_definition type, SourceContext sc): this(new ident(name),type,sc)" Value="" />
@@ -4444,6 +4655,7 @@
       <HelpData Key="var_deconstructor_parameter" Value="Параметр-объявление переменной (возможно без типа)" />
       <HelpData Key="var_deconstructor_parameter.identifier" Value="" />
       <HelpData Key="var_deconstructor_parameter.type" Value="" />
+      <HelpData Key="var_deconstructor_parameter.var_keyword_used" Value="" />
       <HelpData Key="var_def_list" Value="" />
       <HelpData Key="var_def_list.var_def_list Add(var_def_statement _var_def_statement)" Value="" />
       <HelpData Key="var_def_list.var_def_list Add(var_def_statement _var_def_statement, SourceContext sc)" Value="" />
@@ -4537,6 +4749,9 @@
       <HelpData Key="while_node.statements" Value="Тело цикла" />
       <HelpData Key="while_type_specificator_list" Value="" />
       <HelpData Key="while_type_specificator_list.defs" Value="" />
+      <HelpData Key="wild_card_deconstructor_parameter" Value="" />
+      <HelpData Key="wild_card_deconstructor_parameter.exp" Value="" />
+      <HelpData Key="wildcard_deconstructor_parameter" Value="" />
       <HelpData Key="with_statement" Value="Представление оператора with в синтаксическом дереве." />
       <HelpData Key="with_statement." Value="" />
       <HelpData Key="with_statement.do_with" Value="Список объектов, с которыми производить действия." />

SyntaxVisitors/SugarVisitors/PatternsDesugaringVisitor.cs

@@ -46,7 +46,7 @@ namespace SyntaxVisitors.SugarVisitors
         {
             var result = new List<statement>();
             result.Add(CastVariableDefinition);
-            result.Add(new desugared_deconstruction(DeconstructionVariables, CastVariable, patternContext)); 
+            result.Add(new desugared_deconstruction(DeconstructionVariables, CastVariable, patternContext));
             result.Add(SuccessVariableDefinition);
 
             return result;
@@ -60,23 +60,52 @@ namespace SyntaxVisitors.SugarVisitors
         }
     }
 
+    public class CollectionDesugaringResult
+    {
+        public List<statement> VarParametersDeclarations { get; set; } = new List<statement>();
+
+        public expression SuccessMatchingCheck { get; set; }
+
+        public expression CollectionLengthCheck { get; set; }
+
+        public List<semantic_check_sugared_statement_node> ElemTypeChecks { get; set; } = new List<semantic_check_sugared_statement_node>();
+    }
+
+    public class TupleDesugaringResult
+    {
+        public List<statement> VarParametersDeclarations { get; set; } = new List<statement>();
+
+        public expression SuccessMatchingCheck { get; set; }
+
+        public statement TupleLengthCheck { get; set; }
+
+        public List<semantic_check_sugared_statement_node> ElemTypeChecks { get; set; } = new List<semantic_check_sugared_statement_node>();
+    }
+
     public class PatternsDesugaringVisitor : BaseChangeVisitor
     {
         private enum PatternLocation { Unknown, IfCondition, Assign }
 
         private const string DeconstructMethodName = compiler_string_consts.deconstruct_method_name;
         private const string IsTestMethodName = compiler_string_consts.is_test_function_name;
+        private const string WildCardsTupleEqualFunctionName = compiler_string_consts.wild_cards_tuple_equal_function_name;
+        private const string SeqFunctionName = compiler_string_consts.seq_function_name;
+        private const string CountPropertyName = compiler_string_consts.count_property_name;
         private const string GeneratedPatternNamePrefix = "<>pattern";
+        private const string GeneratedDeconstructParamPrefix = "<>deconstructParam";
 
         private int generalVariableCounter = 0;
         private int successVariableCounter = 0;
         private int labelVariableCounter = 0;
+        private int deconstructParamVariableCounter = 0;
 
         private if_node _previousIf;
         private statement desugaredMatchWith;
-
         private List<if_node> processedIfNodes = new List<if_node>();
 
+        //const matching
+        private List<statement> typeChecks = new List<statement>();
+
         public static PatternsDesugaringVisitor New => new PatternsDesugaringVisitor();
 
         public override void visit(match_with matchWith)
@@ -95,26 +124,45 @@ namespace SyntaxVisitors.SugarVisitors
                 if (patternCase == null)
                     continue;
 
-                if (patternCase.pattern is deconstructor_pattern)
+                switch (patternCase.pattern)
                 {
-                    // Проверяем встречался ли уже такой тип при деконструкции
-                    // SSM 02.01.19 пока закомментировал этот кусок т.к. при этом коде падает стандартный пример ArithmSimplify.cs. #1408 снова открыл
-                    /*var deconstructionType = (patternCase.pattern as deconstructor_pattern).
-                        type as named_type_reference;
-                    if (deconstructionType != null &&
-                        deconstructionType.names != null &&
-                        deconstructionType.names.Count != 0)
-                    {
-                        var deconstructionTypeName = deconstructionType.names[0].name;
-                        if (usedDeconstructionTypes.Contains(deconstructionTypeName))
+                    case deconstructor_pattern pattern:
                         {
-                            throw new SyntaxVisitorError("REPEATED_DECONSTRUCTION_TYPE",
-                                                         patternCase.pattern.source_context);
-                        }
-                        usedDeconstructionTypes.Add(deconstructionTypeName);
-                    } */
+                            // Проверяем встречался ли уже такой тип при деконструкции
+                            // SSM 02.01.19 пока закомментировал этот кусок т.к. при этом коде падает стандартный пример ArithmSimplify.cs. #1408 снова открыл
+                            /*var deconstructionType = (patternCase.pattern as deconstructor_pattern).
+                                type as named_type_reference;
+                            if (deconstructionType != null &&
+                                deconstructionType.names != null &&
+                                deconstructionType.names.Count != 0)
+                            {
+                                var deconstructionTypeName = deconstructionType.names[0].name;
+                                if (usedDeconstructionTypes.Contains(deconstructionTypeName))
+                                {
+                                    throw new SyntaxVisitorError("REPEATED_DECONSTRUCTION_TYPE",
+                                                                 patternCase.pattern.source_context);
+                                }
+                                usedDeconstructionTypes.Add(deconstructionTypeName);
+                            } */
 
-                    DesugarDeconstructorPatternCase(matchWith.expr, patternCase);
+                            DesugarDeconstructorPatternCase(matchWith.expr, patternCase);
+                            break;
+                        }
+                    case const_pattern p:
+                        {
+                            DesugarConstPatternCase(matchWith.expr, patternCase);
+                            break;
+                        }
+                    case collection_pattern p:
+                        {
+                            DesugarDeconstructorPatternCase(matchWith.expr, patternCase);
+                            break;
+                        }
+                    case tuple_pattern p:
+                        {
+                            DesugarDeconstructorPatternCase(matchWith.expr, patternCase);
+                            break;
+                        }
                 }
             }
 
@@ -124,6 +172,11 @@ namespace SyntaxVisitors.SugarVisitors
             if (desugaredMatchWith == null)
                 desugaredMatchWith = new empty_statement();
 
+            if (typeChecks.Count != 0)
+            {
+                typeChecks.Add(desugaredMatchWith);
+                desugaredMatchWith = new statement_list(typeChecks);
+            }
             // Замена выражения match with на новое несахарное поддерево и его обход
             ReplaceUsingParent(matchWith, desugaredMatchWith);
             visit(desugaredMatchWith);
@@ -135,21 +188,247 @@ namespace SyntaxVisitors.SugarVisitors
                 throw new SyntaxVisitorError("PATTERN_MATHING_IS_NOT_SUPPORTED_IN_THIS_CONTEXT", isPatternExpr.source_context);
 
             Debug.Assert(GetAscendant<statement_list>(isPatternExpr) != null, "Couldn't find statement list in upper nodes");
-            
+
             DesugarIsExpression(isPatternExpr);
         }
 
-        void DesugarDeconstructorPatternCase(expression matchingExpression, pattern_case patternCase)
+        private void DesugarDeconstructorPatternCase(expression matchingExpression, pattern_case patternCase)
         {
-            Debug.Assert(patternCase.pattern is deconstructor_pattern);
-            
-            var isExpression = new is_pattern_expr(matchingExpression, patternCase.pattern);
+            //var paramCheckExpr = DesugarDeconstructorPatternParameters(patternCase.pattern as deconstructor_pattern);
+
+            var isExpression = new is_pattern_expr(matchingExpression, patternCase.pattern, patternCase.source_context);
             var ifCondition = patternCase.condition == null ? (expression)isExpression : bin_expr.LogicalAnd(isExpression, patternCase.condition);
             var ifCheck = SubtreeCreator.CreateIf(ifCondition, patternCase.case_action);
 
             // Добавляем полученные statements в результат
             AddDesugaredCaseToResult(ifCheck, ifCheck);
         }
+        
+        private type_definition GetTypeDefinitionForConstParam(expression constParamExpr)
+        {
+            switch (constParamExpr)
+            {
+                case string_const type:
+                    return new named_type_reference("string");
+                case char_const type:
+                    return new named_type_reference("char");
+                case int32_const type:
+                    return new named_type_reference("integer");
+                case int64_const type:
+                    return new named_type_reference("integer");
+                case double_const type:
+                    return new named_type_reference("double");
+            }
+            return null;
+        }
+
+        private expression DesugarDeconstructorPatternParameters(deconstructor_pattern pattern)
+        {
+            expression paramCheckExpr = null;
+
+            for (int i = 0; i < pattern.parameters.Count; ++i)
+            {
+                if (pattern.parameters[i] is const_pattern_parameter constPattern)
+                {
+                    var constParamIdent = new ident(NewDeconstructParamId(), pattern.parameters[i].source_context);
+
+                    var eqParams = new expression_list(
+                        new List<expression>()
+                        {
+                            constPattern.const_param,
+                            constParamIdent
+                        }
+                    );
+
+                    var constParamCheck = new method_call(
+                        new dot_node(new ident("object"), new ident("Equals")),
+                        eqParams,
+                        pattern.source_context
+                    );
+
+                    pattern.parameters[i] = new var_deconstructor_parameter(
+                        constParamIdent,
+                        GetTypeDefinitionForConstParam(constPattern.const_param),
+                        false,
+                        pattern.parameters[i].source_context);
+
+                    paramCheckExpr = paramCheckExpr == null ? (expression)constParamCheck : bin_expr.LogicalAnd(paramCheckExpr, constParamCheck);
+                }
+
+                if (pattern.parameters[i] is wild_card_deconstructor_parameter)
+                {
+                    var wildCardGeneratedParamIdent = new ident(NewDeconstructParamId(), pattern.parameters[i].source_context);
+                    pattern.parameters[i] = new var_deconstructor_parameter(
+                        wildCardGeneratedParamIdent,
+                        null,
+                        false,
+                        pattern.parameters[i].source_context);
+                }
+
+                if (pattern.parameters[i] is recursive_deconstructor_parameter deconstructor_param)
+                {
+                    if (deconstructor_param.pattern is deconstructor_pattern deconstructor_pattern)
+                    {
+                        var recursiveChecks = DesugarDeconstructorPatternParameters(deconstructor_pattern);
+                        paramCheckExpr = paramCheckExpr == null ?
+                                         recursiveChecks :
+                                         bin_expr.LogicalAnd(paramCheckExpr, recursiveChecks);
+                    }
+                }
+            }
+            return paramCheckExpr;
+        }
+
+        private void DesugarConstPatternCase(expression matchingExpression, pattern_case patternCase)
+        {
+            Debug.Assert(patternCase.pattern is const_pattern);
+            var patternExpressionNode = patternCase.pattern as const_pattern;
+
+            var statementsToAdd = new List<statement>();
+            var equalCalls = new List<method_call>();
+
+            foreach (var patternExpression in patternExpressionNode.pattern_expressions.expressions)
+            {
+                statementsToAdd.Add(GetTypeCompatibilityCheck(matchingExpression, patternExpression));
+
+                // Matching not tuples
+                var eqParams = new expression_list(
+                    new List<expression>()
+                    {
+                    matchingExpression,
+                    patternExpression
+                    }
+                );
+                equalCalls.Add(
+                    new method_call(
+                        new dot_node(new ident("object"), new ident("Equals")),
+                        eqParams,
+                        patternCase.source_context
+                    )
+                );
+            }
+            typeChecks.AddRange(statementsToAdd);
+
+            expression orPatternCases = equalCalls[0];
+            for (int i = 1; i < equalCalls.Count; ++i)
+            {
+                orPatternCases = bin_expr.LogicalOr(orPatternCases, equalCalls[i]);
+            }
+            var ifCondition = patternCase.condition == null ? orPatternCases : bin_expr.LogicalAnd(orPatternCases, patternCase.condition);
+            var ifCheck = SubtreeCreator.CreateIf(ifCondition, patternCase.case_action);
+
+            // Добавляем полученные statements в результат
+            AddDesugaredCaseToResult(ifCheck, ifCheck);
+        }
+
+        private expression GetCollectionItemsEqualCheckBeforeGap(addressed_value matchingExpression, 
+                                                                 List<pattern_parameter> toCompare, 
+                                                                 CollectionDesugaringResult desugaringResult)
+        {
+            var fromIndex = 0;
+            expression equalChecks = null;
+            foreach (var param in toCompare)
+            {
+                if (param is const_pattern_parameter constParam)
+                {
+                    var indexerCall = new indexer(
+                        matchingExpression,
+                        new expression_list(
+                            new int32_const(fromIndex, matchingExpression.source_context),
+                            matchingExpression.source_context),
+                        matchingExpression.source_context);
+
+                    var eqParams = new expression_list(
+                        new List<expression>()
+                        {
+                            indexerCall,
+                            constParam.const_param
+                        }
+                    );
+
+                    var equalCall = new method_call(
+                        new dot_node(
+                            new ident("object"),
+                            new ident("Equals")),
+                        eqParams,
+                        matchingExpression.source_context
+                    );
+
+                    equalChecks = equalChecks == null ? (expression)equalCall : bin_expr.LogicalAnd(equalChecks, equalCall);
+                    desugaringResult.ElemTypeChecks.Add(GetTypeCompatibilityCheck(constParam.const_param, indexerCall));
+                }
+
+                if (param is collection_pattern_var_parameter varParam)
+                {
+                    desugaringResult.VarParametersDeclarations.Add(
+                        new var_statement(varParam.identifier, 
+                        GetIndexerCallForCollectionPattern(matchingExpression as addressed_value, fromIndex)));
+                }
+                ++fromIndex;
+            }
+            return equalChecks;
+        }
+
+        private expression GetCollectionItemsEqualCheckAfterGap(addressed_value matchingExpression,
+                                                                 List<pattern_parameter> toCompare,
+                                                                 CollectionDesugaringResult desugaringResult)
+        {
+            var elemFromTail = 1;
+            expression equalChecks = null;
+            foreach (var param in toCompare)
+            {
+                var indexerCall = new indexer(
+                        matchingExpression,
+                        new expression_list(
+                            new bin_expr(
+                                new method_call(
+                                    new dot_node(
+                                        matchingExpression,
+                                        new ident("Count", matchingExpression.source_context)),
+                                    new expression_list()),
+                                new int32_const(elemFromTail, matchingExpression.source_context),
+                                Operators.Minus),
+                            matchingExpression.source_context),
+                        matchingExpression.source_context);
+
+                if (param is const_pattern_parameter constParam)
+                {
+                    var eqParams = new expression_list(
+                        new List<expression>()
+                        {
+                        indexerCall,
+                        constParam.const_param
+                        }
+                    );
+
+                    var equalCall = new method_call(
+                        new dot_node(
+                            new ident("object"),
+                            new ident("Equals")),
+                        eqParams,
+                        matchingExpression.source_context
+                    );
+
+                    equalChecks = equalChecks == null ? (expression)equalCall : bin_expr.LogicalAnd(equalChecks, equalCall);
+                    desugaringResult.ElemTypeChecks.Add(GetTypeCompatibilityCheck(constParam.const_param, indexerCall));
+                }
+
+                if (param is collection_pattern_var_parameter varParam)
+                {
+                    desugaringResult.VarParametersDeclarations.Add(
+                        new var_statement(varParam.identifier, indexerCall));
+                }
+
+                ++elemFromTail;
+            }
+            return equalChecks;
+        }
+
+        private expression GetIndexerCallForCollectionPattern(addressed_value matchingExpression, int ind)
+        {
+            var indexerCall = new indexer(matchingExpression, new int32_const(ind), matchingExpression.source_context);
+            return indexerCall;
+        }
 
         private ident NewGeneralName() => new ident(GeneratedPatternNamePrefix + "GenVar" + generalVariableCounter++);
 
@@ -179,7 +458,7 @@ namespace SyntaxVisitors.SugarVisitors
             _previousIf = newIf;
         }
 
-        private DeconstructionDesugaringResult DesugarPattern(deconstructor_pattern pattern, expression matchingExpression)
+        private DeconstructionDesugaringResult DesugarDeconstructorPattern(deconstructor_pattern pattern, expression matchingExpression)
         {
             Debug.Assert(!pattern.IsRecursive, "All recursive patterns should be desugared into simple patterns at this point");
 
@@ -207,23 +486,153 @@ namespace SyntaxVisitors.SugarVisitors
             return desugarResult;
         }
 
+        private CollectionDesugaringResult DesugarCollectionPattern(collection_pattern pattern, expression matchingExpression)
+        {
+            Debug.Assert(!pattern.IsRecursive, "All recursive patterns should be desugared into simple patterns at this point");
+
+            var desugaringResult = new CollectionDesugaringResult();
+            var collectionItems = pattern.parameters;
+            var gapItemMet = false;
+            var gapIndex = 0;
+            var exprBeforeGap = new List<pattern_parameter>();
+            var exprAfterGap = new List<pattern_parameter>();
+            for (int i = 0; i < collectionItems.Count; ++i)
+            {
+                if (collectionItems[i] is collection_pattern_gap_parameter)
+                {
+                    if (gapItemMet)
+                    {
+                        throw new SyntaxVisitorError("REPEATED_DOTDOT_COLLECTION_PATTERN_EXPR",
+                                                     pattern.source_context);
+                    }
+                    gapItemMet = true;
+                    gapIndex = i;
+                    continue;
+                }
+
+                if (gapItemMet)
+                {
+                    exprAfterGap.Insert(0, collectionItems[i]);
+                }
+                else
+                {
+                    exprBeforeGap.Add(collectionItems[i]);
+                }
+            }
+
+            var successMatchingCheck = GetCollectionItemsEqualCheckBeforeGap(
+                matchingExpression as addressed_value, exprBeforeGap, desugaringResult);
+
+            if (gapItemMet && exprAfterGap.Count != 0)
+            {
+                var afterGapEqual = GetCollectionItemsEqualCheckAfterGap(
+                    matchingExpression as addressed_value, exprAfterGap, desugaringResult);
+
+                if (afterGapEqual != null)
+                {
+                    successMatchingCheck = successMatchingCheck == null ?
+                                           afterGapEqual :
+                                           bin_expr.LogicalAnd(successMatchingCheck, afterGapEqual);
+                }
+            }
+            // если добавлять в and, то все равно ран тайм эррор, будто вычисляет все, даже если первое = false
+            desugaringResult.CollectionLengthCheck = new bin_expr(
+                new dot_node(matchingExpression as addressed_value, new ident(CountPropertyName), pattern.source_context),
+                new int32_const(exprBeforeGap.Count + exprAfterGap.Count),
+                Operators.GreaterEqual,
+                pattern.source_context
+            );
+            
+            if (!gapItemMet)
+            {
+                var lengthWithoutGapCheck = new bin_expr(
+                    new dot_node(matchingExpression as addressed_value, new ident(CountPropertyName), pattern.source_context),
+                    new int32_const(exprBeforeGap.Count),
+                    Operators.Equal,
+                    pattern.source_context
+                );
+                successMatchingCheck = successMatchingCheck == null ? 
+                                       lengthWithoutGapCheck :
+                                       bin_expr.LogicalAnd(lengthWithoutGapCheck, successMatchingCheck);
+            }
+
+            desugaringResult.SuccessMatchingCheck = successMatchingCheck == null ?
+                                                    new bool_const(true) :
+                                                    successMatchingCheck;
+            return desugaringResult;
+        }
+
+        private TupleDesugaringResult DesugarTuplePattern(tuple_pattern pattern, expression matchingExpression)
+        {
+            Debug.Assert(!pattern.IsRecursive, "All recursive patterns should be desugared into simple patterns at this point");
+            var desugaringResult = new TupleDesugaringResult();
+            var tupleItems = pattern.parameters;
+
+            for (int i = 0; i < tupleItems.Count; ++i)
+            {
+                var tupleItemCall = new dot_node(
+                                matchingExpression as addressed_value,
+                                new ident("Item" + (i + 1).ToString()),
+                                matchingExpression.source_context);
+                if (tupleItems[i] is tuple_pattern_var_parameter varParam)
+                {
+                    desugaringResult.VarParametersDeclarations.Add(
+                        new var_statement(
+                            varParam.identifier,
+                            tupleItemCall,
+                            matchingExpression.source_context
+                        )
+                    );
+                }
+
+                if (tupleItems[i] is const_pattern_parameter constParam)
+                {
+                    var eqParams = new expression_list(
+                        new List<expression>()
+                        {
+                            tupleItemCall,
+                            constParam.const_param
+                        }
+                    );
+                    var equalCall = new method_call(
+                        new dot_node(new ident("object"), new ident("Equals")),
+                        eqParams,
+                        pattern.source_context
+                    );
+
+                    desugaringResult.SuccessMatchingCheck = desugaringResult.SuccessMatchingCheck == null ?
+                                                            (expression)equalCall :
+                                                            bin_expr.LogicalAnd(desugaringResult.SuccessMatchingCheck, equalCall);
+                    desugaringResult.ElemTypeChecks.Add(GetTypeCompatibilityCheck(constParam.const_param, tupleItemCall));
+                }
+            }
+
+            desugaringResult.TupleLengthCheck = GetTypeCompatibilityCheck(matchingExpression, new int32_const(tupleItems.Count));
+            
+            if (desugaringResult.SuccessMatchingCheck == null)
+            {
+                desugaringResult.SuccessMatchingCheck = new bool_const(true);
+            }
+            return desugaringResult;
+        }
+
         private void DesugarIsExpression(is_pattern_expr isPatternExpr)
         {
-            Debug.Assert(isPatternExpr.right is deconstructor_pattern);
-
-            var patternLocation = GetLocation(isPatternExpr);
-            
-            var pattern = isPatternExpr.right as deconstructor_pattern;
-
-            //AddDefinitionsInUpperStatementList(isPatternExpr, new[] { GetTypeCompatibilityCheck(isPatternExpr) });
-            if (pattern.IsRecursive)
+            if (isPatternExpr.right.IsRecursive)
             {
-                var desugaredRecursiveIs = DesugarRecursiveDeconstructor(isPatternExpr.left, pattern);
+                var desugaredRecursiveIs = DesugarRecursiveParameters(isPatternExpr.left, isPatternExpr.right);
                 ReplaceUsingParent(isPatternExpr, desugaredRecursiveIs);
                 desugaredRecursiveIs.visit(this);
                 return;
             }
+            var patternLocation = GetLocation(isPatternExpr);
 
+            if (isPatternExpr.right is deconstructor_pattern pattern)
+            {
+                var constParamCheck = DesugarDeconstructorPatternParameters(isPatternExpr.right as deconstructor_pattern);
+                pattern.const_params_check = constParamCheck;
+            }
+            //AddDefinitionsInUpperStatementList(isPatternExpr, new[] { GetTypeCompatibilityCheck(isPatternExpr) });
             switch (patternLocation)
             {
                 case PatternLocation.IfCondition: DesugarIsExpressionInIfCondition(isPatternExpr); break;
@@ -231,54 +640,70 @@ namespace SyntaxVisitors.SugarVisitors
             }
         }
 
-        private expression DesugarRecursiveDeconstructor(expression expression, deconstructor_pattern pattern)
+        private expression DesugarRecursiveParameters(expression expression, pattern_node pattern)
         {
-            List<pattern_deconstructor_parameter> parameters = pattern.parameters;
-            expression conjunction = new is_pattern_expr(expression, pattern);
+            List<pattern_parameter> parameters = pattern.parameters;
+            expression conjunction = new is_pattern_expr(expression, pattern, pattern.source_context);
             for (int i = 0; i < parameters.Count; i++)
             {
-                if (parameters[i] is recursive_deconstructor_parameter parameter)
+                if (parameters[i] is recursive_pattern_parameter parameter)
                 {
                     //var parameterType = (parameter.pattern as deconstructor_pattern).type;
                     var newName = NewGeneralName();
-                    var varParameter = new var_deconstructor_parameter(newName, null);
+                    pattern_parameter varParameter = null;
+                    if (pattern is deconstructor_pattern)
+                    {
+                        varParameter = new var_deconstructor_parameter(newName, null, false);
+                    }
+                    else if (pattern is collection_pattern)
+                    {
+                        varParameter = new collection_pattern_var_parameter(newName, null);
+                    }
+                    else if (pattern is tuple_pattern)
+                    {
+                        varParameter = new tuple_pattern_var_parameter(newName, null);
+                    }
                     parameters[i] = varParameter;
                     varParameter.Parent = parameters[i];
-                    conjunction = bin_expr.LogicalAnd(conjunction, DesugarRecursiveDeconstructor(newName, parameter.pattern as deconstructor_pattern));
+                    conjunction = bin_expr.LogicalAnd(conjunction, DesugarRecursiveParameters(newName, parameter.pattern));
                 }
             }
-
             return conjunction;
         }
 
         private void DesugarIsExpressionInAssignment(is_pattern_expr isExpression)
         {
-            var pattern = isExpression.right as deconstructor_pattern;
-            var desugaringResult = DesugarPattern(pattern, isExpression.left);
-            ReplaceUsingParent(isExpression, desugaringResult.SuccessVariable);
-
-            var statementsToAdd = desugaringResult.GetDeconstructionDefinitions(pattern.source_context);
-            statementsToAdd.Add(GetMatchedExpressionCheck(isExpression.left));
-            statementsToAdd.Add(GetTypeCompatibilityCheck(isExpression));
-            statementsToAdd.Add(desugaringResult.GetPatternCheckWithDeconstrunctorCall());
-
+            // TODO: Кинуть тут эксепшн
+            Debug.Assert(isExpression.right is deconstructor_pattern, "Only deconstructor patterns can be used in assignment");
+            var statementsToAdd = ProcessDesugaringForDeconstructorPattern(isExpression);
             AddDefinitionsInUpperStatementList(isExpression, statementsToAdd);
         }
 
         private void DesugarIsExpressionInIfCondition(is_pattern_expr isExpression)
         {
-            var pattern = isExpression.right as deconstructor_pattern;
-            var desugaringResult = DesugarPattern(pattern, isExpression.left);
-            ReplaceUsingParent(isExpression, desugaringResult.SuccessVariable);
+            List<statement> statementsToAdd = null;
 
-            var statementsToAdd = desugaringResult.GetDeconstructionDefinitions(pattern.source_context);
-            statementsToAdd.Add(GetMatchedExpressionCheck(isExpression.left));
-            statementsToAdd.Add(GetTypeCompatibilityCheck(isExpression));
-            statementsToAdd.Add(desugaringResult.GetPatternCheckWithDeconstrunctorCall());
+            switch (isExpression.right)
+            {
+                case deconstructor_pattern dp:
+                    if (dp.const_params_check != null)
+                    {
+                        var ifToAddConstParamsCheckTo = GetAscendant<if_node>(isExpression);
+                        ifToAddConstParamsCheckTo.condition = bin_expr.LogicalAnd(ifToAddConstParamsCheckTo.condition, dp.const_params_check);
+                    }
+                    statementsToAdd = ProcessDesugaringForDeconstructorPattern(isExpression);
+                    break;
+                case collection_pattern cp:
+                    statementsToAdd = ProcessDesugaringForCollectionPattern(isExpression);
+                    break;
+                case tuple_pattern cp:
+                    statementsToAdd = ProcessDesugaringForTuplePattern(isExpression);
+                    break;
+            }
 
             var enclosingIf = GetAscendant<if_node>(isExpression);
             // Если уже обрабатывался ранее (второй встретившийся в том же условии is), то не изменяем if
-            if (processedIfNodes.Contains(enclosingIf)) 
+            if (processedIfNodes.Contains(enclosingIf))
                 AddDefinitionsInUpperStatementList(isExpression, statementsToAdd);
             // Иначе помещаем определения и if-then в отдельный блок, а else после этого блока
             else
@@ -294,12 +719,77 @@ namespace SyntaxVisitors.SugarVisitors
             }
         }
 
+        private List<statement> ProcessDesugaringForDeconstructorPattern(is_pattern_expr isExpression)
+        {
+            var pattern = isExpression.right as deconstructor_pattern;
+            var desugaringResult = DesugarDeconstructorPattern(pattern, isExpression.left);
+            /*
+            var isParent = isExpression.Parent;
+            expression isReplacement = isExpression;
+
+            while (!(isParent is if_node))
+            {
+                if (isParent is bin_expr binParent)
+                {
+                    if (binParent.right == isReplacement)
+                    {
+                        isReplacement = new bin_expr(binParent.left, binParent.right, binParent.operation_type, binParent.source_context);
+                    }
+                    if (binParent.left == isReplacement)
+                    {
+                        isReplacement = binParent.left;
+                    }
+                } 
+                isParent = isParent.Parent;
+            }*/
+            ReplaceUsingParent(isExpression, desugaringResult.SuccessVariable);
+            var statementsToAdd = desugaringResult.GetDeconstructionDefinitions(pattern.source_context);
+            statementsToAdd.Add(GetMatchedExpressionCheck(isExpression.left));
+            statementsToAdd.Add(GetTypeCompatibilityCheck(isExpression));
+            statementsToAdd.Add(desugaringResult.GetPatternCheckWithDeconstrunctorCall());
+
+            return statementsToAdd;
+        }
+
+        private List<statement> ProcessDesugaringForCollectionPattern(is_pattern_expr isExpression)
+        {
+            var pattern = isExpression.right as collection_pattern;
+            var desugaringResult = DesugarCollectionPattern(pattern, isExpression.left);
+            ReplaceUsingParent(isExpression, desugaringResult.SuccessMatchingCheck);
+
+            var statementsToAdd = new List<statement>();
+            statementsToAdd.AddRange(desugaringResult.VarParametersDeclarations);
+            statementsToAdd.AddRange(desugaringResult.ElemTypeChecks);
+            return statementsToAdd;
+        }
+
+        private List<statement> ProcessDesugaringForTuplePattern(is_pattern_expr isExpression)
+        {
+            var pattern = isExpression.right as tuple_pattern;
+            var desugaringResult = DesugarTuplePattern(pattern, isExpression.left);
+            ReplaceUsingParent(isExpression, desugaringResult.SuccessMatchingCheck);
+
+            var statementsToAdd = new List<statement>();
+            statementsToAdd.Add(desugaringResult.TupleLengthCheck);
+            statementsToAdd.AddRange(desugaringResult.VarParametersDeclarations);
+            statementsToAdd.AddRange(desugaringResult.ElemTypeChecks);
+
+            return statementsToAdd;
+        }
+
         private semantic_check_sugared_statement_node GetMatchedExpressionCheck(expression matchedExpression)
         => new semantic_check_sugared_statement_node(SemanticCheckType.MatchedExpression, new List<syntax_tree_node>() { matchedExpression });
 
         private semantic_check_sugared_statement_node GetTypeCompatibilityCheck(is_pattern_expr expression) =>
             new semantic_check_sugared_statement_node(SemanticCheckType.MatchedExpressionAndType, new List<syntax_tree_node>() { expression.left, (expression.right as deconstructor_pattern).type });
 
+        private semantic_check_sugared_statement_node GetTypeCompatibilityCheck(expression expression1, expression expression2) =>
+            new semantic_check_sugared_statement_node(SemanticCheckType.MatchedExpressionAndExpression, new List<syntax_tree_node>() { expression1, expression2 });
+
+        private semantic_check_sugared_statement_node GetTypeCompatibilityCheck(expression tuple, int32_const length) =>
+            new semantic_check_sugared_statement_node(SemanticCheckType.MatchedTuple, new List<syntax_tree_node>() { tuple, length });
+
+
         private statement_list ConvertIfNode(if_node ifNode, List<statement> statementsBeforeIf, out statement elseBody)
         {
             // if e then <then> else <else>
@@ -397,12 +887,12 @@ namespace SyntaxVisitors.SugarVisitors
         private PatternLocation GetLocation(syntax_tree_node node)
         {
             var firstStatement = GetAscendant<statement>(node);
-            
+
             switch (firstStatement)
             {
                 case if_node _: return PatternLocation.IfCondition;
                 case var_statement _: return PatternLocation.Assign;
-                case assign _ : return PatternLocation.Assign;
+                case assign _: return PatternLocation.Assign;
                 default: return PatternLocation.Unknown;
             }
         }
@@ -421,6 +911,11 @@ namespace SyntaxVisitors.SugarVisitors
 
             return null;
         }
+
+        private string NewDeconstructParamId()
+        {
+            return GeneratedPatternNamePrefix + "DeconstructParam" + deconstructParamVariableCounter++.ToString();
+        }
     }
 }
 

TestSuite/CompilationSamples/PABCSystem.pas

@@ -1971,6 +1971,37 @@ function KV<TKey, TVal>(key: TKey; value: TVal): KeyValuePair<TKey, TVal>;
 
 function __TypeCheckAndAssignForIsMatch<T>(obj: object; var res: T): boolean;
 
+function __WildCardsTupleEqual<T1, T2, T3, T4>(
+    first: Tuple<T1, T2>; 
+    second: Tuple<T3, T4>;
+    elemsToCompare: sequence of integer): boolean;
+
+function __WildCardsTupleEqual<T1, T2, T3, T4, T5, T6>(
+    first: Tuple<T1, T2, T3>; 
+    second: Tuple<T4, T5, T6>;
+    elemsToCompare: sequence of integer): boolean;
+
+function __WildCardsTupleEqual<T1, T2, T3, T4, T5, T6, T7, T8>(
+    first: Tuple<T1, T2, T3, T4>; 
+    second: Tuple<T5, T6, T7, T8>;
+    elemsToCompare: sequence of integer): boolean;
+
+function __WildCardsTupleEqual<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10>(
+    first: Tuple<T1, T2, T3, T4, T5>; 
+    second: Tuple<T6, T7, T8, T9, T10>;
+    elemsToCompare: sequence of integer): boolean;
+
+function __WildCardsTupleEqual<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12>(
+    first: Tuple<T1, T2, T3, T4, T5, T6>; 
+    second: Tuple<T7, T8, T9, T10, T11, T12>;
+    elemsToCompare: sequence of integer): boolean;
+
+function __WildCardsTupleEqual<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14>(
+    first: Tuple<T1, T2, T3, T4, T5, T6, T7>; 
+    second: Tuple<T8, T9, T10, T11, T12, T13, T14>;
+    elemsToCompare: sequence of integer): boolean;
+
+
 // -----------------------------------------------------
 //     Стандартные классы исключений
 // -----------------------------------------------------
@@ -4486,6 +4517,112 @@ begin
   end;
 end;
 
+function __WildCardsTupleEqual<T1, T2, T3, T4>(
+    first: Tuple<T1, T2>; 
+    second: Tuple<T3, T4>;
+    elemsToCompare: sequence of integer): boolean;
+begin
+Result := True;
+foreach var ind in elemsToCompare do
+begin
+  case ind of
+  0: Result := Result and first.Item1.Equals(second.Item1);
+  1: Result := Result and first.Item2.Equals(second.Item2);
+  end;
+end;
+end;
+
+function __WildCardsTupleEqual<T1, T2, T3, T4, T5, T6>(
+    first: Tuple<T1, T2, T3>; 
+    second: Tuple<T4, T5, T6>;
+    elemsToCompare: sequence of integer): boolean;
+begin
+Result := True;
+foreach var ind in elemsToCompare do
+begin
+  case ind of
+  0: Result := Result and first.Item1.Equals(second.Item1);
+  1: Result := Result and first.Item2.Equals(second.Item2);
+  2: Result := Result and first.Item3.Equals(second.Item3);
+  end;
+end;
+end;
+
+function __WildCardsTupleEqual<T1, T2, T3, T4, T5, T6, T7, T8>(
+    first: Tuple<T1, T2, T3, T4>; 
+    second: Tuple<T5, T6, T7, T8>;
+    elemsToCompare: sequence of integer): boolean;
+begin
+Result := True;
+foreach var ind in elemsToCompare do
+begin
+  case ind of
+  0: Result := Result and first.Item1.Equals(second.Item1);
+  1: Result := Result and first.Item2.Equals(second.Item2);
+  2: Result := Result and first.Item3.Equals(second.Item3);
+  3: Result := Result and first.Item4.Equals(second.Item4);
+  end;
+end;
+end;
+
+function __WildCardsTupleEqual<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10>(
+    first: Tuple<T1, T2, T3, T4, T5>; 
+    second: Tuple<T6, T7, T8, T9, T10>;
+    elemsToCompare: sequence of integer): boolean;
+begin
+Result := True;
+foreach var ind in elemsToCompare do
+begin
+  case ind of
+  0: Result := Result and first.Item1.Equals(second.Item1);
+  1: Result := Result and first.Item2.Equals(second.Item2);
+  2: Result := Result and first.Item3.Equals(second.Item3);
+  3: Result := Result and first.Item4.Equals(second.Item4);
+  4: Result := Result and first.Item5.Equals(second.Item5);
+  end;
+end;
+end;
+
+function __WildCardsTupleEqual<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12>(
+    first: Tuple<T1, T2, T3, T4, T5, T6>; 
+    second: Tuple<T7, T8, T9, T10, T11, T12>;
+    elemsToCompare: sequence of integer): boolean;
+begin
+Result := True;
+foreach var ind in elemsToCompare do
+begin
+  case ind of
+  0: Result := Result and first.Item1.Equals(second.Item1);
+  1: Result := Result and first.Item2.Equals(second.Item2);
+  2: Result := Result and first.Item3.Equals(second.Item3);
+  3: Result := Result and first.Item4.Equals(second.Item4);
+  4: Result := Result and first.Item5.Equals(second.Item5);
+  5: Result := Result and first.Item6.Equals(second.Item6);
+  end;
+end;
+end;
+
+function __WildCardsTupleEqual<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14>(
+    first: Tuple<T1, T2, T3, T4, T5, T6, T7>; 
+    second: Tuple<T8, T9, T10, T11, T12, T13, T14>;
+    elemsToCompare: sequence of integer): boolean;
+begin
+Result := True;
+foreach var ind in elemsToCompare do
+begin
+  case ind of
+  0: Result := Result and first.Item1.Equals(second.Item1);
+  1: Result := Result and first.Item2.Equals(second.Item2);
+  2: Result := Result and first.Item3.Equals(second.Item3);
+  3: Result := Result and first.Item4.Equals(second.Item4);
+  4: Result := Result and first.Item5.Equals(second.Item5);
+  5: Result := Result and first.Item6.Equals(second.Item6);
+  6: Result := Result and first.Item7.Equals(second.Item7);
+  end;
+end;
+end;
+
+
 ///--
 procedure Deconstruct<T>(self: T; var res: T); extensionmethod;
 begin

TestSuite/patterns/patterns-collection-matching1.pas

@@ -0,0 +1,10 @@
+begin
+  var a := Arr(1, 9, 8, 7, 2, 3, 4, 5); 
+  var c: procedure := () -> begin
+    match a with
+      [.., 4, var x]: assert(x = 5);
+    end;
+  end;
+  
+  c;
+end.

TestSuite/patterns/patterns-collection-matching2.pas

@@ -0,0 +1,46 @@
+type
+  CardInfo = auto class
+  public 
+    cardNumber: string;
+    cv: integer;
+  end;
+  
+  Person = class
+  
+  public 
+    name: string;
+    age: integer;
+    card: CardInfo;
+    
+    constructor(name: string; age: integer; card: CardInfo);
+    begin
+      self.name := name;
+      self.age := age;
+      self.card := card;
+    end;
+    
+    procedure Deconstruct(var name: string; var age: integer; var card: CardInfo);
+    begin
+      name := self.name;
+      age := self.age;
+      card := self.card;
+    end;
+  end;
+
+begin
+  var p1 := new Person('Вася', 11, new CardInfo('12345671', 321));
+  var p2 := new Person('Петя', 12, new CardInfo('12345672', 322));
+  var p3 := new Person('Маша', 13, new CardInfo('12345673', 323));
+  var personArr := Arr(p1, p2, p3);
+  
+  // Расширенный is
+  if personArr is [Person(name1, 11, CardInfo(_, cv)), _, Person(name2, 13, _)] then 
+    assert(name1.Equals('Вася') and (cv = 321) and name2.Equals('Маша'));
+  
+  // match .. with
+  match personArr with
+    [_, _, Person('Вася', var age, _)]: assert(false);
+    [var p, .., Person('Маша', _, _)]: assert((p as Person).name.Equals('Вася'));
+    [..]: assert(false);
+  end;
+end.

TestSuite/patterns/patterns-collection-matching3.pas

@@ -0,0 +1,43 @@
+type
+  CardInfo = auto class
+  public 
+    cardNumber: string;
+    cv: integer;
+  end;
+  
+  Person = class
+    name: string;
+    age: integer;
+    card: List<CardInfo> := new List<CardInfo>();
+    
+    constructor(name: string; age: integer; card: List<CardInfo>);
+    begin
+      self.name := name;
+      self.age := age;
+      self.card := card;
+    end;
+    
+    procedure Deconstruct(var name: string; var age: integer; var card: List<CardInfo>);
+    begin
+      name := self.name;
+      age := self.age;
+      card := self.card;
+    end;
+  end;
+
+begin
+  var cards := new List<CardInfo>();
+  cards.Add(new CardInfo('12345671', 321));
+  cards.Add(new CardInfo('12345672', 322));
+  cards.Add(new CardInfo('12345673', 323));
+  cards.Add(new CardInfo('12345674', 324));
+  
+  var p := new Person('Вася', 21, cards);
+  
+  // match .. with
+  match p with
+    Person('Петя', _, _): assert(false);
+    Person('Вася', _, [_, _, var x]): assert(false);
+    Person(name, _, [CardInfo(_, 321), .., CardInfo(_, 324)]): assert(name.Equals('Вася'));
+  end;
+end.

TestSuite/patterns/patterns-simple-const.pas

@@ -0,0 +1,8 @@
+begin
+  var a := 3.14;
+  match a with
+    1.0, 2.0, 3.0: assert(false);
+    3.13, 3.14, 3.15, 3.16: ;
+    123.0: assert(false);
+  end;
+end.

TestSuite/patterns/patterns-simple-tuple.pas

@@ -0,0 +1,7 @@
+begin
+  match (1, 2, 'string') with
+    (1, _, 'str'): assert(false); 
+    (1, _, 'strin'): assert(false);
+    (_, _, 'string'): ;
+  end;
+end.

TestSuite/patterns/patterns-type-matching1.pas

@@ -0,0 +1,40 @@
+type
+  CardInfo = auto class
+  public 
+    cardNumber: string;
+    cv: integer;
+  end;
+  
+  Person = class
+    name: string;
+    age: integer;
+    card: CardInfo;
+    
+    constructor(name: string; age: integer; card: CardInfo);
+    begin
+      self.name := name;
+      self.age := age;
+      self.card := card;
+    end;
+    
+    procedure Deconstruct(var name: string; var age: integer; var card: CardInfo);
+    begin
+      name := self.name;
+      age := self.age;
+      card := self.card;
+    end;
+  end;
+
+begin
+  var a := new Person('Вася', 11, new CardInfo('12345678', 324));
+  
+  // Расширенный is
+  if a is Person(_, var age, CardInfo(_, var cv)) then assert((age = 11) and (cv = 324));
+  
+  // match .. with
+  match a with
+    Person('Петя', 12, CardInfo('12345678', var cv)): assert(false); 
+    Person('Вася', _, CardInfo(cardNum, 324)): assert(cardNum.Equals('12345678'));
+    Person(_, _, CardInfo(_, x)): assert(false);
+  end;
+end.

TreeConverter/TreeConversion/SyntaxTreeVisitorNodes/Patterns.cs

@@ -144,9 +144,9 @@ namespace PascalABCCompiler.TreeConverter
             }
         }
 
-        private bool AreTheSameType(type_node type1, type_node type2) => 
-            type1 != null && 
-            type2 != null && 
+        private bool AreTheSameType(type_node type1, type_node type2) =>
+            type1 != null &&
+            type2 != null &&
             convertion_data_and_alghoritms.possible_equal_types(type1, type2);
 
         private bool IsSelfParameter(parameter parameter) => parameter.name.ToLower() == compiler_string_consts.self_word;
@@ -209,7 +209,7 @@ namespace PascalABCCompiler.TreeConverter
 
             if (node is generic_instance_type_node genericNode)
                 foreach (var index in genericNode.instance_params.Aggregate(
-                    Enumerable.Empty<int>(), 
+                    Enumerable.Empty<int>(),
                     (indices, nextNode) => indices.Concat(GenericParameterIndices(nextNode)))
                     .Distinct())
                     yield return index;
@@ -261,5 +261,40 @@ namespace PascalABCCompiler.TreeConverter
 
             AddError(get_location(matchedExpression), "EXPRESSION_OF_TYPE_{0}_CANNOT_BE_MATCHED_AGAINST_PATTERN_WITH_TYPE_{1}", expression.name, type.name);
         }
+
+        private void CheckIfCanBeMatched(expression matchedExpression, expression patternExpression)
+        {
+            var patternType = convert_strong(patternExpression).type;
+            var expressionType = convert_strong(matchedExpression).type;
+
+            var expressionTypeName = expressionType.BaseFullName;
+            var patternTypeName = patternType.BaseFullName;
+
+            var tupleName = "System.Tuple";
+            if (type_table.is_derived(patternType, expressionType) ||
+                type_table.is_derived(expressionType, patternType) ||
+                AreTheSameType(patternType, expressionType) ||
+                (expressionTypeName.StartsWith(tupleName) &&
+                patternTypeName.StartsWith(tupleName) &&
+                int.Parse(expressionTypeName.Substring(tupleName.Length + 1, 1)) ==
+                int.Parse(patternTypeName.Substring(tupleName.Length + 1, 1))))
+                return;
+
+            AddError(get_location(matchedExpression), "EXPRESSION_OF_TYPE_{0}_CANNOT_BE_MATCHED_AGAINST_PATTERN_WITH_TYPE_{1}", expressionType.name, patternType.name);
+        }
+
+        private void CheckIfCanBeMatched(expression tuple, int32_const length)
+        {
+            var expressionType = convert_strong(tuple).type;
+            var expressionTypeName = expressionType.BaseFullName;
+
+            var tupleName = "System.Tuple";
+            if (expressionTypeName.StartsWith(tupleName) &&
+                int.Parse(expressionTypeName.Substring(tupleName.Length + 1, 1)) == length.val)
+                return;
+
+            AddError(get_location(tuple),
+                "EXPRESSION_OF_TYPE_{0}_CANNOT_BE_MATCHED_AGAINST_PATTERN_WITH_TYPE_{1}", expressionType.name, "Tuple`" + length.val);
+        }
     }
 }

TreeConverter/TreeConversion/compiler_string_consts.cs

@@ -1,437 +1,439 @@
-// Copyright (c) Ivan Bondarev, Stanislav Mihalkovich (for details please see \doc\copyright.txt)
-// This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
-//Строковые константы.
-using System;
-using System.Collections;
-using System.Collections.Generic;
-using System.Text;
-using PascalABCCompiler.TreeRealization;
-
-namespace PascalABCCompiler.TreeConverter
-{
-
-    public static class compiler_string_consts
-    {
-
-        public static Dictionary<string, string> oper_names = new Dictionary<string, string>();
-
-        static int tvnc = 0;
-        public static string GetTempVariableName()
-        {
-            return "$TV" + (tvnc++).ToString() + "$";
-        }
-
-        static compiler_string_consts()
-        {
-            oper_names[plus_name] = "op_Addition";
-            oper_names[minus_name] = "op_Subtraction";
-            oper_names[mul_name] = "op_Multiply";
-            oper_names[div_name] = "op_Division";
-            oper_names[idiv_name] = "op_Division";
-            oper_names[and_name] = "op_BitwiseAnd";
-            oper_names[or_name] = "op_BitwiseOr";
-            oper_names[eq_name] = "op_Equality";
-            oper_names[gr_name] = "op_GreaterThan";
-            oper_names[greq_name] = "op_GreaterThanOrEqual";
-            oper_names[sm_name] = "op_LessThan";
-            oper_names[smeq_name] = "op_LessThanOrEqual";
-            oper_names[mod_name] = "op_Modulus";
-            oper_names[not_name] = "op_LogicalNot";
-            oper_names[noteq_name] = "op_Inequality";
-        }
-
-        public static string GetNETOperName(string name)
-        {
-            string oper_name = null;
-            if (oper_names.TryGetValue(name, out oper_name))
-                return oper_name;
-            return null;
-        }
-
-        public static string GetConnectedFunctionName(string class_name, string func_name)
-        {
-            if (oper_names.ContainsKey(func_name))
-                func_name = oper_names[func_name];
-            return class_name + "_" + func_name;
-        }
-
-        public static string GetGenericTypeInformation(string name, out int generic_param_count)
-        {
-            generic_param_count = 0;
-            if (name == null)
-            {
-                return null;
-            }
-            string rez = name;
-            int ind = name.IndexOf(compiler_string_consts.generic_params_infix);
-            if (ind > 0)
-            {
-                rez = name.Substring(0, ind);
-                if (name.Length > ind + 1)
-                {
-                    try
-                    {
-                        generic_param_count = Convert.ToInt32(name.Substring(ind + 1));
-                    }
-                    catch
-                    {
-                        generic_param_count = 0;
-                    }
-                }
-            }
-            return rez;
-        }
-
-
-        public static string ImplementationSectionNamespaceName = "_implementation______";
-
-        public static readonly string bool_type_name = "boolean";
-        public static readonly string byte_type_name = "byte";
-        public static readonly string sbyte_type_name = "shortint";
-        public static readonly string short_type_name = "smallint";
-        public static readonly string ushort_type_name = "word";
-        public static readonly string integer_type_name = "integer";//longint
-        public static readonly string uint_type_name = "longword";//cardinal
-        public static readonly string long_type_name = "int64";//int64
-        public static readonly string ulong_type_name = "uint64";
-        //public static readonly string decimal_type_name = "decimal";
-        public static readonly string real_type_name = "real";
-        public static readonly string float_type_name = "single";
-        public static readonly string char_type_name = "char";
-        public static readonly string string_type_name = "string";
-        public static readonly string pointer_type_name = "pointer";
-        public static readonly string object_type_name = "object";
-        public static readonly string true_const_name = "true";
-        public static readonly string false_const_name = "false";
-        public static readonly string base_exception_class_name = "Exception";
-        public static readonly string combine_method_name = "Combine";
-        public static readonly string remove_method_name = "Remove";
-        public static readonly string base_enum_class_name = "Enum";
-        public static readonly string void_class_name = "void";
-        public static string value = "value";
-        public static readonly string object_equals_name = "Equals";
-
-        public static readonly string plus_name = "+";
-        public static readonly string minus_name = "-";
-        public static readonly string mul_name = "*";
-        public static readonly string div_name = "/";
-        public static readonly string idiv_name = "div";
-        public static readonly string mod_name = "mod";
-        public static readonly string explicit_operator_name = "op_Explicit";
-        public static readonly string implicit_operator_name = "op_Implicit";
-
-        //public static string CommandLineArgsVariableName = "CommandLineArgs";
-        public static string MainArgsParamName = "args";
-        public static string IsConsoleApplicationVariableName = "IsConsoleApplication";
-
-        public static readonly string plusassign_name = "+=";
-        public static readonly string minusassign_name = "-=";
-        public static readonly string multassign_name = "*=";
-        public static readonly string divassign_name = "/=";
-        public static readonly string power_name = "**";
-        public static readonly string gr_name = ">";
-        public static readonly string sm_name = "<";
-        public static readonly string greq_name = ">=";
-        public static readonly string smeq_name = "<=";
-        public static readonly string eq_name = "=";
-        public static readonly string noteq_name = "<>";
-
-        public static readonly string or_name = "or";
-        public static readonly string xor_name = "xor";
-        public static readonly string not_name = "not";
-        public static readonly string and_name = "and";
-
-        public static readonly string as_name = "as";
-        public static readonly string is_name = "is";
-        public static readonly string in_name = "in";
-        public static readonly string shl_name = "shl";
-        public static readonly string shr_name = "shr";
-
-        public static readonly string assign_name = ":=";
-
-        public static readonly string unary_param_name = "param";
-        public static readonly string left_param_name = "left";
-        public static readonly string right_param_name = "right";
-
-        public static readonly string main_function_name = "Main";
-        public static readonly string c_main_function_name = "main";
-        public static readonly string temp_main_function_name = "$Main";
-        public static readonly string initialization_function_name = "$Initialization";
-        public static readonly string finalization_function_name = "$Finalization";
-
-        public static readonly string function_return_value_prefix = "$rv_";
-        public static readonly string empty_function_name = "empty_function";
-
-        public static readonly string break_procedure_name = "break";
-        public static readonly string continue_procedure_name = "continue";
-        public static readonly string exit_procedure_name = "exit";
-
-
-        public static readonly string temp_for_variable_name = "$tfr_";
-
-        public static readonly string lower_array_const_name = "LowerIndex";
-        public static readonly string upper_array_const_name = "UpperIndex";
-
-        public static readonly string pascal_array_name = "$pascal_array";
-        public static readonly string indexer_name = "[]";
-        public static readonly string internal_array_name = "NullBasedArray";
-        public static readonly string simple_array_name = "simple_array";
-
-        public static readonly string get_val_pascal_array_name = "get_val";
-        public static readonly string set_val_pascal_array_name = "set_val";
-        public static readonly string index_property_pascal_array_name = "index";
-
-        public static readonly string system_unit_name = "PascalABCSystem";
-
-        public static readonly string delegate_type_name_template = "$delegate";
-
-        public static readonly string roof_name = "^";
-
-        public static readonly string string_concat_method_name = "Concat";
-        public static readonly string to_string_method_name = "ToString";
-
-        public static readonly string base_delegate_type_name = "delegate";
-        public static readonly string base_array_type_name = "array";
-        public static readonly string net_constructor_name = ".ctor";
-
-        public static readonly string method_group_type_name = "Method group";
-
-        public static readonly string invoke_method_name = "Invoke";
-        public static readonly string begin_invoke_method_name = "BeginInvoke";
-        public static readonly string end_invoke_method_name = "EndInvoke";
-        public static readonly string callback_string = "callback";
-        public static readonly string result_string = "result";
-        public static readonly string object_in_par_string = "'object'";
-
-        public static readonly string omp_get_nested = "omp_get_nested";
-        public static readonly string omp_set_nested = "omp_set_nested";
-        public static readonly string OMP_NESTED = "OMP_NESTED";
-
-        public static readonly string set_length_procedure_name = "SetLength";
-        public static readonly string set_length_for_short_string = "SetLengthForShortString";
-        public static readonly string self_word = "self";
-        public static string get_pointer_type_name_by_type_name(string type_name)
-        {
-            return (roof_name + type_name);
-        }
-
-        public static string format_procedure_name = "FormatValue";
-        public static string read_procedure_name = "read";
-        public static string write_procedure_name = "write";
-        public static string writeln_procedure_name = "writeln";
-        public static string readln_procedure_name = "readln";
-        public static string text_file_name_type_name = "Text";
-        public static string TextFileInitProcedureName = "TextFileInit";
-        public static string StringDefaultPropertySetProcedureName = "StringDefaultPropertySet";
-        public static string BinaryFileTypeName = "BinaryFile";
-        public static string AbstractBinaryFileTypeName = "AbstractBinaryFile";
-        public static string BinaryFileInitProcedureName = "BinaryFileInit";
-        public static string BinaryFileReadProcedureName = "BinaryFileRead";
-        public static string TypedFileTypeName = "TypedFile";
-        public static string TypedFileInitProcedureName = "TypedFileInit";
-        public static string TypedFileReadProcedureName = "TypedFileRead";
-        public static string ShortStringTypeName = "ShortString";
-        public static string ShortStringTypeInitProcedure = "InitShortString";
-        public static string PointerOutputTypeName = "PointerOutput";
-
-        public static string PascalReadAccessorName = "read";
-        public static string PascalWriteAccessorName = "write";
-        public static string AssignSetName = "AssignSetFrom";
-        public static string TypedSetInitProcedure = "TypedSetInit";
-        public static string TypedSetInitProcedureWithBounds = "TypedSetInitWithBounds";
-        public static string TypedSetInitWithShortString = "TypedSetInitWithShortString";
-        public static string AssignSetProcedure = "AssignSet";
-        public static string AssignSetProcedureWithBounds = "AssignSetWithBounds";
-        public static string ClipShortStringInSetFunction = "ClipShortStringInSet";
-        public static string ClipShortStringInSetProcedure = "ClipShortStringInSetProcedure";
-        public static string union_of_set = "Union";
-        public static string intersect_of_set = "Intersect";
-        public static string subtract_of_set = "Subtract";
-        public static string in_set = "InSet";
-        public static string CreateSetProcedure = "CreateSet";
-        public static string IncludeProcedure = "Include";
-        public static string ExcludeProcedure = "Exclude";
-        public static string DiapasonType = "Diapason";
-        public static string CreateDiapason = "CreateDiapason";
-        public static string CreateObjDiapason = "CreateObjDiapason";
-        public static string CompareSetEquals = "CompareSetEquals";
-        public static string CompareSetInEquals = "CompareSetInEquals";
-        public static string CompareSetLess = "CompareSetLess";
-        public static string CompareSetLessEqual = "CompareSetLessEqual";
-        public static string CompareSetGreater = "CompareSetGreater";
-        public static string CompareSetGreaterEqual = "CompareSetGreaterEqual";
-        public static string IncProcedure = "Inc";
-        public static string DecProcedure = "Dec";
-        public static string SuccFunction = "Succ";
-        public static string PredFunction = "Pred";
-        public static string OrdFunction = "Ord";
-        public static string ClipProcedure = "ClipSet";
-        public static string ClipFunction = "ClipSetFunc";
-        public static string ClipShortString = "ClipShortString";
-        public static string GetCharInShortString = "GetCharInShortString";
-        public static string SetCharInShortString = "SetCharInShortString";
-        public static string read_short_string = "ReadShortString";
-        public static string read_short_string_from_file = "ReadShortStringFromFile";
-        public static string Insert = "Insert";
-        public static string Delete = "Delete";
-        public static string InsertInShortString = "InsertInShortString";
-        public static string AssertProcedure = "Assert";
-        public static string CopyWithSizeFunction = "CopyWithSize";
-        public static string Low = "Low";
-        public static string High = "High";
-        public static string ArrayCopyFunction = "Copy";
-        public static string check_in_range = "check_in_range";
-        public static string check_in_range_char = "check_in_range_char";
-        public static string ShortStringTypeNameTemplate = string_type_name + "[{0}]";
-        public static string GetCurrentLineFunction = "__GetCurrentLine__";
-        public static string GetCurrentFileFunction = "__GetCurrentFile__";
-        public static string GetShortStringTypeName(int length)
-        {
-            if (length < 256)
-                return string.Format(ShortStringTypeNameTemplate, length);
-            else return string.Format(ShortStringTypeName);
-        }
-
-        public static string TypedFileTypeNameTemplate = "file of {0}";
-        public static string TypedSetTypeNameTemplate = "set of {0}";
-        public static string GetTypedFileTypeName(string elem_type_name)
-        {
-            return string.Format(TypedFileTypeNameTemplate, elem_type_name);
-        }
-
-        public static string GetSetTypeName(string elem_type_name)
-        {
-            return string.Format(TypedSetTypeNameTemplate, elem_type_name);
-        }
-
-        public static string array_word = "array";
-        private static string of_word = "of";
-        private static string space = " ";
-
-        public static string result_variable_name = "result";
-
-        public static string event_add_method_nameformat = event_add_method_prefix + "{0}";
-        public static string event_remove_method_nameformat = event_remove_method_prefix + "{0}";
-        public static string event_add_method_prefix = "add_";
-        public static string event_remove_method_prefix = "remove_";
-
-        public static string default_constructor_name = "create";
-
-        // SSM - Константы директив компилятора. Вообще разбросаны по коду. Пусть будут здесь (3.1.2011)
-        public static string compiler_directive_apptype = "apptype";
-        public static string compiler_directive_reference = "reference";
-        public static string include_namespace_directive = "includenamespace";
-        public static string compiler_savepcu = "savepcu";
-        public static string compiler_directive_nullbasedstrings = "nullbasedstrings";
-        public static string compiler_directive_nullbasedstrings_ON = "string_nullbased+";
-        public static string compiler_directive_nullbasedstrings_OFF = "string_nullbased-";
-        public static string compiler_directive_initstring_as_empty_ON = "string_initempty+";
-        public static string compiler_directive_initstring_as_empty_OFF = "string_initempty-";
-        public static string compiler_directive_resource = "resource";
-        public static string compiler_directive_platformtarget = "platformtarget";
-        public static string compiler_directive_faststrings = "faststrings";
-
-        // SSM (3.1.2011) Перенес эти константы сюда. 
-        public static string version_string = "version";
-        public static string product_string = "product";
-        public static string company_string = "company";
-        public static string copyright_string = "copyright";
-        public static string trademark_string = "trademark";
-        public static string main_resource_string = "mainresource";
-        public static string title_string = "title";
-        public static string description_string = "description";
-
-        public static string system_unit_marker = "__IS_SYSTEM_MODULE";
-        public static string system_unit_file_name = "PABCSystem";
-        public static string extensions_unit_file_name = "PABCExtensions";
-
-        public static string get_array_type_name(string type_name, int rank)
-        {
-            if (rank == 1)
-                return (array_word + space + of_word + space + type_name);
-            else
-            {
-                StringBuilder sb = new StringBuilder();
-                sb.Append(',', rank - 1);
-                return array_word + "[" + sb.ToString() + "]" + space + of_word + space + type_name;
-            }
-        }
-
-        public static readonly string new_array_procedure_name = "__new_array";
-
-        public static readonly string new_procedure_name = "new";
-        public static readonly string dispose_procedure_name = "dispose";
-
-        public static string pointer_net_type_name_intptr = "System.IntPtr";
-        public static string pointer_net_type_name_void = "System.Void*";
-
-        public static string record_const_type_name = "RecordConst";
-        public static string array_const_type_name = "ArrayConst";
-        public static string auto_type_name = "AutoType"; // SSM 25.06.16 - тип, который определяется на этапе компиляции при первом присваивании
-        public static string ienumerable_auto_type_name = "IEnumerableAutoType"; // SSM 05.07.16 - тип, который определяется на этапе компиляции при первом присваивании
-        public static string recort_printable_name_template = "record{0}end";
-        public static string set_name = "TypedSet";
-        public const string deconstruct_method_name = "deconstruct";
-        public const string is_test_function_name = "__TypeCheckAndAssignForIsMatch";
-
-        public static string bounded_array_printable_name_template = "array [{0}..{1}] of {2}";
-        public static string array_printable_name_template = "array of {0}";
-        public static string multi_dim_array_printable_name_template = "array [{0}] of {1}";
-        public static readonly string generic_params_infix = "`";
-
-        public static string GetAccessorName(string accessorTemplate, string name)
-        {
-            return string.Format(accessorTemplate, name);
-        }
-        public static string GetGetAccessorName(string name)
-        {
-            return GetAccessorName("get_{0}", name);
-        }
-        public static string GetSetAccessorName(string name)
-        {
-            return GetAccessorName("set_{0}", name);
-        }
-        public static string GetAddHandler(string name)
-        {
-            return "add_" + name;
-        }
-        public static string GetRemoveHandler(string name)
-        {
-            return "remove_" + name;
-        }
-        public static string IEnumerableInterfaceName = "System.Collections.IEnumerable";
-        public static string IGenericEnumerableInterfaceName = "System.Collections.Generic.IEnumerable`1";
-        public static string GetEnumeratorMethodName = "GetEnumerator";
-        public static string IEnumeratorInterfaceName = "System.Collections.IEnumerator";
-        public static string IGenericEnumeratorInterfaceName = "System.Collections.Generic.IEnumerator`1";
-        public static string CurrentPropertyName = "Current";
-
-        public static string static_ctor_prefix = "$sctor$";
-        public static string generic_param_kind_prefix = "$kind_of$";
-        public static string CheckCanUsePointerOnType_proc_name = "CheckCanUsePointerOnType";
-        public static string CheckCanUseTypeForBinaryFiles_proc_name = "CheckCanUseTypeForBinaryFiles";
-        public static string CheckCanUseTypeForTypedFiles_proc_name = "CheckCanUseTypeForTypedFiles";
-        public static string RuntimeDetermineType_func_name = "RuntimeDetermineType";
-        public static string RuntimeInitializeFunction_func_name = "RuntimeInitialize";
-        public static string PointerToStringFunction_func_name = "PointerToString";
-        public static string GetRuntimeSizeFunction_func_name = "GetRuntimeSize";
-        public static string StrProcedure_func_name = "Str";
-        public static string PascalABCVersion_func_name = "PascalABCVersion";
-        public static string ChrUnicodeFunction_func_name = "ChrUnicode";
-        public static string ExceptionName = "System.Exception";
-        public static string value_in_accessor_name = "$value";
-        public static string synonym_value_name = "$synonym";
-        public static string file_of_attr_name = "$Attributes.$FileOfAttr";
-        public static string set_of_attr_name = "$Attributes.$SetOfAttr";
-        public static string type_synonim_attr_name = "$Attributes.$TypeSynonimAttr";
-        public static string template_class_attr_name = "$Attributes.$TemplateClassAttr";
-        public static string short_string_attr_name = "$Attributes.$ShortStringAttr";
-        public static string global_attr_name = "$GlobAttr";
-        public static string class_unit_attr_name = "$ClassUnitAttr";
-        public static string pabc_rtl_dll_name = "PABCRtl.dll";
-        public static string ObjectType = "Object";
-        public static string StringType = "string";
-        public static string config_variable_name = "__CONFIG__";
-    }
-
-}
+// Copyright (c) Ivan Bondarev, Stanislav Mihalkovich (for details please see \doc\copyright.txt)
+// This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
+//Строковые константы.
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Text;
+using PascalABCCompiler.TreeRealization;
+
+namespace PascalABCCompiler.TreeConverter
+{
+
+    public static class compiler_string_consts
+    {
+
+        public static Dictionary<string, string> oper_names = new Dictionary<string, string>();
+
+        static int tvnc = 0;
+        public static string GetTempVariableName()
+        {
+            return "$TV" + (tvnc++).ToString() + "$";
+        }
+
+        static compiler_string_consts()
+        {
+            oper_names[plus_name] = "op_Addition";
+            oper_names[minus_name] = "op_Subtraction";
+            oper_names[mul_name] = "op_Multiply";
+            oper_names[div_name] = "op_Division";
+            oper_names[idiv_name] = "op_Division";
+            oper_names[and_name] = "op_BitwiseAnd";
+            oper_names[or_name] = "op_BitwiseOr";
+            oper_names[eq_name] = "op_Equality";
+            oper_names[gr_name] = "op_GreaterThan";
+            oper_names[greq_name] = "op_GreaterThanOrEqual";
+            oper_names[sm_name] = "op_LessThan";
+            oper_names[smeq_name] = "op_LessThanOrEqual";
+            oper_names[mod_name] = "op_Modulus";
+            oper_names[not_name] = "op_LogicalNot";
+            oper_names[noteq_name] = "op_Inequality";
+        }
+
+        public static string GetNETOperName(string name)
+        {
+            string oper_name = null;
+            if (oper_names.TryGetValue(name, out oper_name))
+                return oper_name;
+            return null;
+        }
+
+        public static string GetConnectedFunctionName(string class_name, string func_name)
+        {
+            if (oper_names.ContainsKey(func_name))
+                func_name = oper_names[func_name];
+            return class_name + "_" + func_name;
+        }
+
+        public static string GetGenericTypeInformation(string name, out int generic_param_count)
+        {
+            generic_param_count = 0;
+            if (name == null)
+            {
+                return null;
+            }
+            string rez = name;
+            int ind = name.IndexOf(compiler_string_consts.generic_params_infix);
+            if (ind > 0)
+            {
+                rez = name.Substring(0, ind);
+                if (name.Length > ind + 1)
+                {
+                    try
+                    {
+                        generic_param_count = Convert.ToInt32(name.Substring(ind + 1));
+                    }
+                    catch
+                    {
+                        generic_param_count = 0;
+                    }
+                }
+            }
+            return rez;
+        }
+
+
+        public static string ImplementationSectionNamespaceName = "_implementation______";
+
+        public static readonly string bool_type_name = "boolean";
+        public static readonly string byte_type_name = "byte";
+        public static readonly string sbyte_type_name = "shortint";
+        public static readonly string short_type_name = "smallint";
+        public static readonly string ushort_type_name = "word";
+        public static readonly string integer_type_name = "integer";//longint
+        public static readonly string uint_type_name = "longword";//cardinal
+        public static readonly string long_type_name = "int64";//int64
+        public static readonly string ulong_type_name = "uint64";
+        //public static readonly string decimal_type_name = "decimal";
+        public static readonly string real_type_name = "real";
+        public static readonly string float_type_name = "single";
+        public static readonly string char_type_name = "char";
+        public static readonly string string_type_name = "string";
+        public static readonly string pointer_type_name = "pointer";
+        public static readonly string object_type_name = "object";
+        public static readonly string true_const_name = "true";
+        public static readonly string false_const_name = "false";
+        public static readonly string base_exception_class_name = "Exception";
+        public static readonly string combine_method_name = "Combine";
+        public static readonly string remove_method_name = "Remove";
+        public static readonly string base_enum_class_name = "Enum";
+        public static readonly string void_class_name = "void";
+        public static string value = "value";
+        public static readonly string object_equals_name = "Equals";
+
+        public static readonly string plus_name = "+";
+        public static readonly string minus_name = "-";
+        public static readonly string mul_name = "*";
+        public static readonly string div_name = "/";
+        public static readonly string idiv_name = "div";
+        public static readonly string mod_name = "mod";
+        public static readonly string explicit_operator_name = "op_Explicit";
+        public static readonly string implicit_operator_name = "op_Implicit";
+
+        //public static string CommandLineArgsVariableName = "CommandLineArgs";
+        public static string MainArgsParamName = "args";
+        public static string IsConsoleApplicationVariableName = "IsConsoleApplication";
+
+        public static readonly string plusassign_name = "+=";
+        public static readonly string minusassign_name = "-=";
+        public static readonly string multassign_name = "*=";
+        public static readonly string divassign_name = "/=";
+        public static readonly string power_name = "**";
+        public static readonly string gr_name = ">";
+        public static readonly string sm_name = "<";
+        public static readonly string greq_name = ">=";
+        public static readonly string smeq_name = "<=";
+        public static readonly string eq_name = "=";
+        public static readonly string noteq_name = "<>";
+
+        public static readonly string or_name = "or";
+        public static readonly string xor_name = "xor";
+        public static readonly string not_name = "not";
+        public static readonly string and_name = "and";
+
+        public static readonly string as_name = "as";
+        public static readonly string is_name = "is";
+        public static readonly string in_name = "in";
+        public static readonly string shl_name = "shl";
+        public static readonly string shr_name = "shr";
+
+        public static readonly string assign_name = ":=";
+
+        public static readonly string unary_param_name = "param";
+        public static readonly string left_param_name = "left";
+        public static readonly string right_param_name = "right";
+
+        public static readonly string main_function_name = "Main";
+        public static readonly string c_main_function_name = "main";
+        public static readonly string temp_main_function_name = "$Main";
+        public static readonly string initialization_function_name = "$Initialization";
+        public static readonly string finalization_function_name = "$Finalization";
+
+        public static readonly string function_return_value_prefix = "$rv_";
+        public static readonly string empty_function_name = "empty_function";
+
+        public static readonly string break_procedure_name = "break";
+        public static readonly string continue_procedure_name = "continue";
+        public static readonly string exit_procedure_name = "exit";
+
+
+        public static readonly string temp_for_variable_name = "$tfr_";
+
+        public static readonly string lower_array_const_name = "LowerIndex";
+        public static readonly string upper_array_const_name = "UpperIndex";
+
+        public static readonly string pascal_array_name = "$pascal_array";
+        public static readonly string indexer_name = "[]";
+        public static readonly string internal_array_name = "NullBasedArray";
+        public static readonly string simple_array_name = "simple_array";
+
+        public static readonly string get_val_pascal_array_name = "get_val";
+        public static readonly string set_val_pascal_array_name = "set_val";
+        public static readonly string index_property_pascal_array_name = "index";
+
+        public static readonly string system_unit_name = "PascalABCSystem";
+
+        public static readonly string delegate_type_name_template = "$delegate";
+
+        public static readonly string roof_name = "^";
+
+        public static readonly string string_concat_method_name = "Concat";
+        public static readonly string to_string_method_name = "ToString";
+
+        public static readonly string base_delegate_type_name = "delegate";
+        public static readonly string base_array_type_name = "array";
+        public static readonly string net_constructor_name = ".ctor";
+
+        public static readonly string method_group_type_name = "Method group";
+
+        public static readonly string invoke_method_name = "Invoke";
+        public static readonly string begin_invoke_method_name = "BeginInvoke";
+        public static readonly string end_invoke_method_name = "EndInvoke";
+        public static readonly string callback_string = "callback";
+        public static readonly string result_string = "result";
+        public static readonly string object_in_par_string = "'object'";
+
+        public static readonly string omp_get_nested = "omp_get_nested";
+        public static readonly string omp_set_nested = "omp_set_nested";
+        public static readonly string OMP_NESTED = "OMP_NESTED";
+
+        public static readonly string set_length_procedure_name = "SetLength";
+        public static readonly string set_length_for_short_string = "SetLengthForShortString";
+        public static readonly string self_word = "self";
+        public static string get_pointer_type_name_by_type_name(string type_name)
+        {
+            return (roof_name + type_name);
+        }
+
+        public static string format_procedure_name = "FormatValue";
+        public static string read_procedure_name = "read";
+        public static string write_procedure_name = "write";
+        public static string writeln_procedure_name = "writeln";
+        public static string readln_procedure_name = "readln";
+        public static string text_file_name_type_name = "Text";
+        public static string TextFileInitProcedureName = "TextFileInit";
+        public static string StringDefaultPropertySetProcedureName = "StringDefaultPropertySet";
+        public static string BinaryFileTypeName = "BinaryFile";
+        public static string AbstractBinaryFileTypeName = "AbstractBinaryFile";
+        public static string BinaryFileInitProcedureName = "BinaryFileInit";
+        public static string BinaryFileReadProcedureName = "BinaryFileRead";
+        public static string TypedFileTypeName = "TypedFile";
+        public static string TypedFileInitProcedureName = "TypedFileInit";
+        public static string TypedFileReadProcedureName = "TypedFileRead";
+        public static string ShortStringTypeName = "ShortString";
+        public static string ShortStringTypeInitProcedure = "InitShortString";
+        public static string PointerOutputTypeName = "PointerOutput";
+
+        public static string PascalReadAccessorName = "read";
+        public static string PascalWriteAccessorName = "write";
+        public static string AssignSetName = "AssignSetFrom";
+        public static string TypedSetInitProcedure = "TypedSetInit";
+        public static string TypedSetInitProcedureWithBounds = "TypedSetInitWithBounds";
+        public static string TypedSetInitWithShortString = "TypedSetInitWithShortString";
+        public static string AssignSetProcedure = "AssignSet";
+        public static string AssignSetProcedureWithBounds = "AssignSetWithBounds";
+        public static string ClipShortStringInSetFunction = "ClipShortStringInSet";
+        public static string ClipShortStringInSetProcedure = "ClipShortStringInSetProcedure";
+        public static string union_of_set = "Union";
+        public static string intersect_of_set = "Intersect";
+        public static string subtract_of_set = "Subtract";
+        public static string in_set = "InSet";
+        public static string CreateSetProcedure = "CreateSet";
+        public static string IncludeProcedure = "Include";
+        public static string ExcludeProcedure = "Exclude";
+        public static string DiapasonType = "Diapason";
+        public static string CreateDiapason = "CreateDiapason";
+        public static string CreateObjDiapason = "CreateObjDiapason";
+        public static string CompareSetEquals = "CompareSetEquals";
+        public static string CompareSetInEquals = "CompareSetInEquals";
+        public static string CompareSetLess = "CompareSetLess";
+        public static string CompareSetLessEqual = "CompareSetLessEqual";
+        public static string CompareSetGreater = "CompareSetGreater";
+        public static string CompareSetGreaterEqual = "CompareSetGreaterEqual";
+        public static string IncProcedure = "Inc";
+        public static string DecProcedure = "Dec";
+        public static string SuccFunction = "Succ";
+        public static string PredFunction = "Pred";
+        public static string OrdFunction = "Ord";
+        public static string ClipProcedure = "ClipSet";
+        public static string ClipFunction = "ClipSetFunc";
+        public static string ClipShortString = "ClipShortString";
+        public static string GetCharInShortString = "GetCharInShortString";
+        public static string SetCharInShortString = "SetCharInShortString";
+        public static string read_short_string = "ReadShortString";
+        public static string read_short_string_from_file = "ReadShortStringFromFile";
+        public static string Insert = "Insert";
+        public static string Delete = "Delete";
+        public static string InsertInShortString = "InsertInShortString";
+        public static string AssertProcedure = "Assert";
+        public static string CopyWithSizeFunction = "CopyWithSize";
+        public static string Low = "Low";
+        public static string High = "High";
+        public static string ArrayCopyFunction = "Copy";
+        public static string check_in_range = "check_in_range";
+        public static string check_in_range_char = "check_in_range_char";
+        public static string ShortStringTypeNameTemplate = string_type_name + "[{0}]";
+        public static string GetCurrentLineFunction = "__GetCurrentLine__";
+        public static string GetCurrentFileFunction = "__GetCurrentFile__";
+        public static string GetShortStringTypeName(int length)
+        {
+            if (length < 256)
+                return string.Format(ShortStringTypeNameTemplate, length);
+            else return string.Format(ShortStringTypeName);
+        }
+
+        public static string TypedFileTypeNameTemplate = "file of {0}";
+        public static string TypedSetTypeNameTemplate = "set of {0}";
+        public static string GetTypedFileTypeName(string elem_type_name)
+        {
+            return string.Format(TypedFileTypeNameTemplate, elem_type_name);
+        }
+
+        public static string GetSetTypeName(string elem_type_name)
+        {
+            return string.Format(TypedSetTypeNameTemplate, elem_type_name);
+        }
+
+        public static string array_word = "array";
+        private static string of_word = "of";
+        private static string space = " ";
+
+        public static string result_variable_name = "result";
+
+        public static string event_add_method_nameformat = event_add_method_prefix + "{0}";
+        public static string event_remove_method_nameformat = event_remove_method_prefix + "{0}";
+        public static string event_add_method_prefix = "add_";
+        public static string event_remove_method_prefix = "remove_";
+
+        public static string default_constructor_name = "create";
+
+        // SSM - Константы директив компилятора. Вообще разбросаны по коду. Пусть будут здесь (3.1.2011)
+        public static string compiler_directive_apptype = "apptype";
+        public static string compiler_directive_reference = "reference";
+        public static string include_namespace_directive = "includenamespace";
+        public static string compiler_savepcu = "savepcu";
+        public static string compiler_directive_nullbasedstrings = "nullbasedstrings";
+        public static string compiler_directive_nullbasedstrings_ON = "string_nullbased+";
+        public static string compiler_directive_nullbasedstrings_OFF = "string_nullbased-";
+        public static string compiler_directive_initstring_as_empty_ON = "string_initempty+";
+        public static string compiler_directive_initstring_as_empty_OFF = "string_initempty-";
+        public static string compiler_directive_resource = "resource";
+        public static string compiler_directive_platformtarget = "platformtarget";
+        public static string compiler_directive_faststrings = "faststrings";
+
+        // SSM (3.1.2011) Перенес эти константы сюда. 
+        public static string version_string = "version";
+        public static string product_string = "product";
+        public static string company_string = "company";
+        public static string copyright_string = "copyright";
+        public static string trademark_string = "trademark";
+        public static string main_resource_string = "mainresource";
+        public static string title_string = "title";
+        public static string description_string = "description";
+
+        public static string system_unit_marker = "__IS_SYSTEM_MODULE";
+        public static string system_unit_file_name = "PABCSystem";
+        public static string extensions_unit_file_name = "PABCExtensions";
+
+        public static string get_array_type_name(string type_name, int rank)
+        {
+            if (rank == 1)
+                return (array_word + space + of_word + space + type_name);
+            else
+            {
+                StringBuilder sb = new StringBuilder();
+                sb.Append(',', rank - 1);
+                return array_word + "[" + sb.ToString() + "]" + space + of_word + space + type_name;
+            }
+        }
+
+        public static readonly string new_array_procedure_name = "__new_array";
+
+        public static readonly string new_procedure_name = "new";
+        public static readonly string dispose_procedure_name = "dispose";
+
+        public static string pointer_net_type_name_intptr = "System.IntPtr";
+        public static string pointer_net_type_name_void = "System.Void*";
+
+        public static string record_const_type_name = "RecordConst";
+        public static string array_const_type_name = "ArrayConst";
+        public static string auto_type_name = "AutoType"; // SSM 25.06.16 - тип, который определяется на этапе компиляции при первом присваивании
+        public static string ienumerable_auto_type_name = "IEnumerableAutoType"; // SSM 05.07.16 - тип, который определяется на этапе компиляции при первом присваивании
+        public static string recort_printable_name_template = "record{0}end";
+        public static string set_name = "TypedSet";
+        public const string deconstruct_method_name = "deconstruct";
+        public const string is_test_function_name = "__TypeCheckAndAssignForIsMatch";
+        public const string wild_cards_tuple_equal_function_name = "__WildCardsTupleEqual";
+        public const string seq_function_name = "Seq";
+        public const string count_property_name = "Count";
+        public static string bounded_array_printable_name_template = "array [{0}..{1}] of {2}";
+        public static string array_printable_name_template = "array of {0}";
+        public static string multi_dim_array_printable_name_template = "array [{0}] of {1}";
+        public static readonly string generic_params_infix = "`";
+
+        public static string GetAccessorName(string accessorTemplate, string name)
+        {
+            return string.Format(accessorTemplate, name);
+        }
+        public static string GetGetAccessorName(string name)
+        {
+            return GetAccessorName("get_{0}", name);
+        }
+        public static string GetSetAccessorName(string name)
+        {
+            return GetAccessorName("set_{0}", name);
+        }
+        public static string GetAddHandler(string name)
+        {
+            return "add_" + name;
+        }
+        public static string GetRemoveHandler(string name)
+        {
+            return "remove_" + name;
+        }
+        public static string IEnumerableInterfaceName = "System.Collections.IEnumerable";
+        public static string IGenericEnumerableInterfaceName = "System.Collections.Generic.IEnumerable`1";
+        public static string GetEnumeratorMethodName = "GetEnumerator";
+        public static string IEnumeratorInterfaceName = "System.Collections.IEnumerator";
+        public static string IGenericEnumeratorInterfaceName = "System.Collections.Generic.IEnumerator`1";
+        public static string CurrentPropertyName = "Current";
+
+        public static string static_ctor_prefix = "$sctor$";
+        public static string generic_param_kind_prefix = "$kind_of$";
+        public static string CheckCanUsePointerOnType_proc_name = "CheckCanUsePointerOnType";
+        public static string CheckCanUseTypeForBinaryFiles_proc_name = "CheckCanUseTypeForBinaryFiles";
+        public static string CheckCanUseTypeForTypedFiles_proc_name = "CheckCanUseTypeForTypedFiles";
+        public static string RuntimeDetermineType_func_name = "RuntimeDetermineType";
+        public static string RuntimeInitializeFunction_func_name = "RuntimeInitialize";
+        public static string PointerToStringFunction_func_name = "PointerToString";
+        public static string GetRuntimeSizeFunction_func_name = "GetRuntimeSize";
+        public static string StrProcedure_func_name = "Str";
+        public static string PascalABCVersion_func_name = "PascalABCVersion";
+        public static string ChrUnicodeFunction_func_name = "ChrUnicode";
+        public static string ExceptionName = "System.Exception";
+        public static string value_in_accessor_name = "$value";
+        public static string synonym_value_name = "$synonym";
+        public static string file_of_attr_name = "$Attributes.$FileOfAttr";
+        public static string set_of_attr_name = "$Attributes.$SetOfAttr";
+        public static string type_synonim_attr_name = "$Attributes.$TypeSynonimAttr";
+        public static string template_class_attr_name = "$Attributes.$TemplateClassAttr";
+        public static string short_string_attr_name = "$Attributes.$ShortStringAttr";
+        public static string global_attr_name = "$GlobAttr";
+        public static string class_unit_attr_name = "$ClassUnitAttr";
+        public static string pabc_rtl_dll_name = "PABCRtl.dll";
+        public static string ObjectType = "Object";
+        public static string StringType = "string";
+        public static string config_variable_name = "__CONFIG__";
+    }
+
+}

TreeConverter/TreeConversion/syntax_tree_visitor.cs

@@ -20162,6 +20162,18 @@ namespace PascalABCCompiler.TreeConverter
                 var type = st.lst[1] as type_definition;
                 CheckIfCanBeMatched(expr, type);
             }
+            else if (st.typ is SemanticCheckType.MatchedExpressionAndExpression)
+            {
+                var matchedExpr = st.lst[0] as expression;
+                var patternExpr = st.lst[1] as expression;
+                CheckIfCanBeMatched(matchedExpr, patternExpr);
+            }
+            else if (st.typ is SemanticCheckType.MatchedTuple)
+            {
+                var tuple = st.lst[0] as expression;
+                var length = st.lst[1] as int32_const;
+                CheckIfCanBeMatched(tuple, length);
+            }
             // !Patterns
             else
             {

bin/Lib/PABCSystem.pas

@@ -1971,6 +1971,37 @@ function KV<TKey, TVal>(key: TKey; value: TVal): KeyValuePair<TKey, TVal>;
 
 function __TypeCheckAndAssignForIsMatch<T>(obj: object; var res: T): boolean;
 
+function __WildCardsTupleEqual<T1, T2, T3, T4>(
+    first: Tuple<T1, T2>; 
+    second: Tuple<T3, T4>;
+    elemsToCompare: sequence of integer): boolean;
+
+function __WildCardsTupleEqual<T1, T2, T3, T4, T5, T6>(
+    first: Tuple<T1, T2, T3>; 
+    second: Tuple<T4, T5, T6>;
+    elemsToCompare: sequence of integer): boolean;
+
+function __WildCardsTupleEqual<T1, T2, T3, T4, T5, T6, T7, T8>(
+    first: Tuple<T1, T2, T3, T4>; 
+    second: Tuple<T5, T6, T7, T8>;
+    elemsToCompare: sequence of integer): boolean;
+
+function __WildCardsTupleEqual<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10>(
+    first: Tuple<T1, T2, T3, T4, T5>; 
+    second: Tuple<T6, T7, T8, T9, T10>;
+    elemsToCompare: sequence of integer): boolean;
+
+function __WildCardsTupleEqual<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12>(
+    first: Tuple<T1, T2, T3, T4, T5, T6>; 
+    second: Tuple<T7, T8, T9, T10, T11, T12>;
+    elemsToCompare: sequence of integer): boolean;
+
+function __WildCardsTupleEqual<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14>(
+    first: Tuple<T1, T2, T3, T4, T5, T6, T7>; 
+    second: Tuple<T8, T9, T10, T11, T12, T13, T14>;
+    elemsToCompare: sequence of integer): boolean;
+
+
 // -----------------------------------------------------
 //     Стандартные классы исключений
 // -----------------------------------------------------
@@ -4486,6 +4517,112 @@ begin
   end;
 end;
 
+function __WildCardsTupleEqual<T1, T2, T3, T4>(
+    first: Tuple<T1, T2>; 
+    second: Tuple<T3, T4>;
+    elemsToCompare: sequence of integer): boolean;
+begin
+Result := True;
+foreach var ind in elemsToCompare do
+begin
+  case ind of
+  0: Result := Result and first.Item1.Equals(second.Item1);
+  1: Result := Result and first.Item2.Equals(second.Item2);
+  end;
+end;
+end;
+
+function __WildCardsTupleEqual<T1, T2, T3, T4, T5, T6>(
+    first: Tuple<T1, T2, T3>; 
+    second: Tuple<T4, T5, T6>;
+    elemsToCompare: sequence of integer): boolean;
+begin
+Result := True;
+foreach var ind in elemsToCompare do
+begin
+  case ind of
+  0: Result := Result and first.Item1.Equals(second.Item1);
+  1: Result := Result and first.Item2.Equals(second.Item2);
+  2: Result := Result and first.Item3.Equals(second.Item3);
+  end;
+end;
+end;
+
+function __WildCardsTupleEqual<T1, T2, T3, T4, T5, T6, T7, T8>(
+    first: Tuple<T1, T2, T3, T4>; 
+    second: Tuple<T5, T6, T7, T8>;
+    elemsToCompare: sequence of integer): boolean;
+begin
+Result := True;
+foreach var ind in elemsToCompare do
+begin
+  case ind of
+  0: Result := Result and first.Item1.Equals(second.Item1);
+  1: Result := Result and first.Item2.Equals(second.Item2);
+  2: Result := Result and first.Item3.Equals(second.Item3);
+  3: Result := Result and first.Item4.Equals(second.Item4);
+  end;
+end;
+end;
+
+function __WildCardsTupleEqual<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10>(
+    first: Tuple<T1, T2, T3, T4, T5>; 
+    second: Tuple<T6, T7, T8, T9, T10>;
+    elemsToCompare: sequence of integer): boolean;
+begin
+Result := True;
+foreach var ind in elemsToCompare do
+begin
+  case ind of
+  0: Result := Result and first.Item1.Equals(second.Item1);
+  1: Result := Result and first.Item2.Equals(second.Item2);
+  2: Result := Result and first.Item3.Equals(second.Item3);
+  3: Result := Result and first.Item4.Equals(second.Item4);
+  4: Result := Result and first.Item5.Equals(second.Item5);
+  end;
+end;
+end;
+
+function __WildCardsTupleEqual<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12>(
+    first: Tuple<T1, T2, T3, T4, T5, T6>; 
+    second: Tuple<T7, T8, T9, T10, T11, T12>;
+    elemsToCompare: sequence of integer): boolean;
+begin
+Result := True;
+foreach var ind in elemsToCompare do
+begin
+  case ind of
+  0: Result := Result and first.Item1.Equals(second.Item1);
+  1: Result := Result and first.Item2.Equals(second.Item2);
+  2: Result := Result and first.Item3.Equals(second.Item3);
+  3: Result := Result and first.Item4.Equals(second.Item4);
+  4: Result := Result and first.Item5.Equals(second.Item5);
+  5: Result := Result and first.Item6.Equals(second.Item6);
+  end;
+end;
+end;
+
+function __WildCardsTupleEqual<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14>(
+    first: Tuple<T1, T2, T3, T4, T5, T6, T7>; 
+    second: Tuple<T8, T9, T10, T11, T12, T13, T14>;
+    elemsToCompare: sequence of integer): boolean;
+begin
+Result := True;
+foreach var ind in elemsToCompare do
+begin
+  case ind of
+  0: Result := Result and first.Item1.Equals(second.Item1);
+  1: Result := Result and first.Item2.Equals(second.Item2);
+  2: Result := Result and first.Item3.Equals(second.Item3);
+  3: Result := Result and first.Item4.Equals(second.Item4);
+  4: Result := Result and first.Item5.Equals(second.Item5);
+  5: Result := Result and first.Item6.Equals(second.Item6);
+  6: Result := Result and first.Item7.Equals(second.Item7);
+  end;
+end;
+end;
+
+
 ///--
 procedure Deconstruct<T>(self: T; var res: T); extensionmethod;
 begin

bin/Lng/Rus/SyntaxTreeVisitorsErrors.dat

@@ -19,6 +19,7 @@ LAMBDA_EXPRESSIONS_CANNOT_CONTAIN_YIELD=Лямбда-выражения не м
 PATTERN_MATHING_IS_NOT_SUPPORTED_IN_THIS_CONTEXT=Сопоставление с образцом не поддерживается в данном контексте
 ONLY_ONE_DECONSTRUCT_ALLOWED=Можно определить только один пользовательский деконструктор
 REPEATED_DECONSTRUCTION_TYPE=Повторение типов при сопоставлении с образцом
+REPEATED_DOTDOT_COLLECTION_PATTERN_EXPR=Конструкция '..' встречена более одного раза в выражении для сопоставления
 
 Var_{0}_is_already_defined=Переменная {0} уже определена