Interface <> Implementation – Pascal – Fórum – Programujte.com

Code:
interface

type
  TForm2 = class(TForm)
    procedure Shaders(var aShaderProgram: glUInt);
...

implementation

procedure TForm2.Shaders;
How come it is possible that I can compile and run this?

#1 adamlevine

And what do not you think why it should not work?

the minimum program can only be created with the empty TForm1 = class (TForm) window; , the basic libraries of the compiler are all that the functional window needs for the TForm class.

#1 adamlevine
Pascal allows this, you can omit repeated parameter definition in implementation. The previous definition from interface will be used automatically.

Error only occurs if you do write something in implementation and it differs from interface.

#1 adamlevine

the header of the procedure in the implementation must match the header in the interface

type
  TForm2 = class(TForm)
    procedure Shaders(var aShaderProgram: glUInt);
...
implementation
procedure TForm2.Shaders (var aShaderProgram: glUInt);