From a9b9b2545a60e02f5ede973e0d28ca25d0e2131a Mon Sep 17 00:00:00 2001
From: Voloshin Bogdan <ya.bovi2012@yandex.ru>
Date: Thu, 17 May 2018 03:00:10 +0300
Subject: [PATCH] Improve code examples

---
 .../SimpleTypeclassesImplementation.pas       | 19 +++--
 CodeExamples/t1.pas                           | 77 +++++++++++++++++++
 .../StandardSyntaxConverter.cs                |  2 +-
 3 files changed, 87 insertions(+), 11 deletions(-)
 create mode 100644 CodeExamples/t1.pas

diff --git a/CodeExamples/SimpleTypeclassesImplementation.pas b/CodeExamples/SimpleTypeclassesImplementation.pas
index 49a40b1e1..99f99fb43 100644
--- a/CodeExamples/SimpleTypeclassesImplementation.pas
+++ b/CodeExamples/SimpleTypeclassesImplementation.pas
@@ -90,7 +90,7 @@ type
     function equal(x, y: integer):boolean := x = y;
   end;
   
-(*  
+  
   Ord[integer] = instance
     function compare(x, y: integer): Ordering;
     begin
@@ -101,8 +101,7 @@ type
       else
         Result := _GT;
     end;
-  end;
-*)    
+  end;   
   
   
   Show[boolean] = instance
@@ -156,7 +155,7 @@ begin
   end;
 end;
 
-(*
+
 procedure MySort<T>(var a: array of T); where Ord[T];
 begin
   for var i := 1 to a.Length - 1 do
@@ -164,9 +163,9 @@ begin
     var sorted := true;
     for var j := 0 to a.Length - 1 - i do
     begin
-      if Ord&[T].greater(a[i - 1], a[i]) then
+      if Ord&[T].greater(a[j], a[j + 1]) then
       begin
-        swap(a[i - 1], a[i]);
+        swap(a[j], a[j + 1]);
         sorted := false;
       end;
     end;
@@ -175,7 +174,7 @@ begin
       break;
   end;
 end;
-*)
+
 
 // ---Test Functions---
 
@@ -227,7 +226,7 @@ begin
   writeln(isCorrect);
 end;
 
-(*
+
 procedure TestOrd();
 begin
   var a := Arr(3, 1, 4, 2, 5, 0);
@@ -241,12 +240,12 @@ begin
   writeln(isCorrect);  
   
 end;
-*)
+
 begin
 
   TestEq();
   TestShow();
   TestRead();
- // TestOrd();
+  TestOrd();
   
 end.
\ No newline at end of file
diff --git a/CodeExamples/t1.pas b/CodeExamples/t1.pas
new file mode 100644
index 000000000..3035f6c02
--- /dev/null
+++ b/CodeExamples/t1.pas
@@ -0,0 +1,77 @@
+type
+  Ordering = (_EQ, _LT, _GT);
+  
+  IEq<T> = interface
+    function eequal(x, y: T): boolean;
+    function notEqual(x, y: T): boolean;
+  end;
+  
+  
+  Eq<T> = abstract class(IEq<T>)
+  public 
+    
+    function eequal(x, y: T): boolean; virtual;
+    begin
+      Result := not notEqual(x, y);
+    end;
+    
+    function notEqual(x, y: T): boolean; virtual;
+    begin
+      Result := not eequal(x, y);
+    end;
+  end;
+  
+  
+  IOrd<T> = interface(IEq<T>)
+    function compare(x, y: T): Ordering;
+    function less(x, y: T): boolean;
+    function lessEqual(x, y: T): boolean;
+    function greater(x, y: T): boolean;
+    function greaterEqual(x, y: T): boolean;
+    function mmin(x, y: T): T;
+    function mmax(x, y: T): T;
+  end;
+  
+  
+  Ord<T1, EqT> = abstract class
+    where EqT: IEq<T1>, constructor;
+  public 
+    
+    function eequal(x, y: T1): boolean; virtual;
+    begin
+      var eqInst := __ConceptSingleton&<EqT>.&Instance;
+      Result := eqInst.eequal(x, y);
+    end;
+    
+    function notEqual(x, y: T1): boolean; virtual;
+    begin
+      var eqInst := __ConceptSingleton&<EqT>.&Instance;
+      Result := eqInst.notEqual(x, y);
+    end;
+  end;
+
+function ArrayEq<T, EqT>(l1, l2: array of T): boolean; where EqT: IEq<T>, constructor;
+begin
+  var eqtinstance := __ConceptSingleton&<EqT>.&Instance;
+  Result := true;
+  for var i :=0 to l1.Length - 1 do
+    if eqtinstance.notEqual(l1[i], l2[i]) then
+    begin
+      Result := false;
+      break;
+    end;
+end;
+
+
+function Max3<T, OrdT>(v1, v2, v3: T): T;
+  where OrdT: IOrd<T>, constructor;
+begin
+  var ordInst := __ConceptSingleton&<OrdT>.&Instance;
+  
+  Result := ordInst.mmax(v1, ordInst.mmax(v2, v3));
+end;
+
+
+begin
+ // writeln(Max3&<integer, Ord_integer<Eq_integer>>(1, 2, 3))
+end.
\ No newline at end of file
diff --git a/SyntaxTreeConverters/StandardSyntaxConverter.cs b/SyntaxTreeConverters/StandardSyntaxConverter.cs
index fb9464572..ea9d3ddb5 100644
--- a/SyntaxTreeConverters/StandardSyntaxConverter.cs
+++ b/SyntaxTreeConverters/StandardSyntaxConverter.cs
@@ -32,7 +32,7 @@ namespace PascalABCCompiler.SyntaxTreeConverters
                 SyntaxVisitors.TypeclassVisitors.ReplaceTypeclassVisitor.New(instancesAndRestrictedFunctions).ProcessNode(root);
             }
             root.FillParentsInAllChilds();
-            new SimplePrettyPrinterVisitor("E:/projs/out.txt").ProcessNode(root);
+            //new SimplePrettyPrinterVisitor("E:/projs/out.txt").ProcessNode(root);
             // loop
             LoopDesugarVisitor.New.ProcessNode(root);