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fix #2652

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Sun Serega 2022-04-09 16:16:36 +03:00
parent 5313362403
commit 34ebf14bb2
3 changed files with 29 additions and 15 deletions
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14
TestSuite/lambda_where_1.pas Normal file
View file

@ -0,0 +1,14 @@
type
r1<T> = record
where T: record;
end;
//Ошибка: Невозможно инстанцировать, так как тип T не является размерным
procedure p1<T>; where T: record;
begin
// Обязательно лямбда
// Обязательно возвращаемое значение, но неважно какое
var f: r1<T>->byte := r->0;
end;
begin end.

9
TreeConverter/LambdaExpressions/Closure/CapturedVariablesSubstitutor.cs
View file

@ -1056,19 +1056,22 @@ namespace TreeConverter.LambdaExpressions.Closure
types = new where_type_specificator_list()
};
if (el.base_class != null && el.base_class != SystemLibrary.object_type)
var base_describes_type = false;
if (el.base_class != SystemLibrary.object_type)
{
base_describes_type = el.base_class != SystemLibrary.enum_base_type;
var d = LambdaHelper.ConvertSemanticTypeToSyntaxType(el.base_class);
whereDef.types.Add(d);
}
else if (el.is_class)
if (el.is_class && !base_describes_type)
{
var d = new declaration_specificator(DeclarationSpecificator.WhereDefClass, "class");
whereDef.types.Add(d);
}
if (el.is_value)
{
if (base_describes_type) throw new InvalidOperationException($"where with record and base other then enum");
var d = new declaration_specificator(DeclarationSpecificator.WhereDefValueType, "record");
whereDef.types.Add(d);
}

21
TreeConverter/TreeConversion/syntax_tree_visitor.cs
View file

@ -13070,10 +13070,19 @@ namespace PascalABCCompiler.TreeConverter
{
visit_generic_params(context.top_function, _function_header.template_args.idents);
}
if (_function_header.where_defs != null)
visit_where_list(_function_header.where_defs);
SymbolInfo si = context.create_special_names();
weak_node_test_and_visit(_function_header.parameters);
type_node tn = null;
bool unique = context.close_function_params(body_exists);
if (!unique && _function_header.where_defs != null)
// Видимо, ошибка только для глобальных forward продпрограмм
AddError(get_location(_function_header.where_defs), "WHERE_SECTION_MUST_BE_ONLY_IN_FIRST_DECLARATION");
#region Вывод типа возвращаемого значения лямбды
//lroman//
@ -13159,20 +13168,8 @@ namespace PascalABCCompiler.TreeConverter
}
CheckOverrideOrReintroduceExpectedWarning(get_location(_function_header));
bool unique = context.close_function_params(body_exists);
if (context.top_function.return_value_type == null)
AddError(get_location(_function_header), "FUNCTION_NEED_RETURN_TYPE");
if (_function_header.where_defs != null)
{
if (unique)
{
visit_where_list(_function_header.where_defs);
}
else
{
AddError(get_location(_function_header.where_defs), "WHERE_SECTION_MUST_BE_ONLY_IN_FIRST_DECLARATION");
}
}
convertion_data_and_alghoritms.create_function_return_variable(context.top_function, si);
//TODO: Разобрать подробнее.