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+ 312 problem with local proc in methods and ForEach

pierre 25 years ago
parent
commit
311a357239
2 changed files with 143 additions and 0 deletions
  1. 142 0
      bugs/bug0312.pp
  2. 1 0
      bugs/readme.txt

+ 142 - 0
bugs/bug0312.pp

@@ -0,0 +1,142 @@
+
+
+uses
+  objects;
+
+type
+{$ifndef FPC}
+  sw_integer = integer;
+{$endif not FPC}
+
+  PMYObj = ^TMyObj;
+
+  TMyObj = Object(TObject)
+    x : longint;
+    Constructor Init(ax : longint);
+    procedure display;virtual;
+    end;
+
+  PMYObj2 = ^TMyObj2;
+
+  TMyObj2 = Object(TMyObj)
+    y : longint;
+    Constructor Init(ax,ay : longint);
+    procedure display;virtual;
+    end;
+
+  PMyCollection = ^TMyCollection;
+
+  TMyCollection = Object(TCollection)
+    function At(I : sw_integer) : PMyObj;
+    procedure DummyThatShouldNotBeCalled;virtual;
+    end;
+
+  { TMy is also a TCollection so that
+    ShowMy and DummyThatShouldNotBeCalled are at same position in VMT }
+  TMy = Object(TCollection)
+    Col : PMyCollection;
+    MyObj : PMyObj;
+    ShowMyCalled : boolean;
+    constructor Init;
+    destructor Done;virtual;
+    procedure ShowAll;
+    procedure AddMyObj(x : longint);
+    procedure AddMyObj2(x,y : longint);
+    procedure ShowMy;virtual;
+    end;
+
+  Constructor TMyObj.Init(ax : longint);
+    begin
+      Inherited Init;
+      x:=ax;
+    end;
+
+  Procedure TMyObj.Display;
+    begin
+      Writeln('x = ',x);
+    end;
+
+  Constructor TMyObj2.Init(ax,ay : longint);
+    begin
+      Inherited Init(ax);
+      y:=ay;
+    end;
+
+  Procedure TMyObj2.Display;
+    begin
+      Writeln('x = ',x,' y = ',y);
+    end;
+
+  Function TMyCollection.At(I : sw_integer) : PMyObj;
+    begin
+      At:=Inherited At(I);
+    end;
+
+  Procedure TMyCollection.DummyThatShouldNotBeCalled;
+    begin
+      Writeln('This method should never be called');
+      Abstract;
+    end;
+
+  Constructor TMy.Init;
+
+    begin
+      New(Col,Init(5,5));
+      MyObj:=nil;
+      ShowMyCalled:=false;
+    end;
+
+  Destructor TMy.Done;
+    begin
+      Dispose(Col,Done);
+      Inherited Done;
+    end;
+
+  Procedure TMy.ShowAll;
+
+      procedure ShowIt(P : pointer);{$ifdef TP}far;{$endif}
+        begin
+          ShowMy;
+          PMyObj(P)^.Display;
+        end;
+    begin
+      Col^.ForEach(@ShowIt);
+    end;
+
+  Procedure TMy.ShowMy;
+    begin
+      if assigned(MyObj) then
+        MyObj^.Display;
+      ShowMyCalled:=true;
+    end;
+
+  Procedure TMy.AddMyObj(x : longint);
+
+    begin
+      MyObj:=New(PMyObj,Init(x));
+      Col^.Insert(MyObj);
+    end;
+
+  Procedure TMy.AddMyObj2(x,y : longint);
+    begin
+      MyObj:=New(PMyObj2,Init(x,y));
+      Col^.Insert(MyObj);
+    end;
+
+var
+   My : TMy;
+begin
+   My.Init;
+   My.AddMyObj(5);
+   My.AddMyObj2(4,3);
+   My.AddMyObj(43);
+   { MyObj field is now a PMyObj with value 43 }
+   My.ShowAll;
+   If not My.ShowMyCalled then
+     begin
+       Writeln('ShowAll does not work correctly');
+       Halt(1);
+     end;
+   My.Done;
+
+end.

+ 1 - 0
bugs/readme.txt

@@ -401,3 +401,4 @@ bug0262.pp   problems with virtual and overloaded methods
 bug0293.pp   no error with variable name = type name
 bug0293.pp   no error with variable name = type name
 bug0299.pp   passing Array[0..1] of char by value to proc leads to problems
 bug0299.pp   passing Array[0..1] of char by value to proc leads to problems
 bug0305.pp   Finally is not handled correctly after inputting 0
 bug0305.pp   Finally is not handled correctly after inputting 0
+bug0312.pp   Again the problem of local procs inside methods