Hi,

I have a problem with overloaded functions. I defined these functions:
function val_(name: string): string;
function val_(name: string): boolean;
function val_(name: string): integer;
function val_(name: string): double;
var
  res: boolean;
begin
  res := val_(option_variable);
end;

I get the following error: Error: Incompatible types: got "ShortString" expected "Boolean". So for some reason the compiler is looking at the first function. The mode is objfpc and I turned ansistrings off. I tested by adding the overload modifier but without result. What else could I try or do? Or is overloading only allowed for different parameter lists?

Rgds, Darius

Overloading means that you have functions with the same name but different parameter (or param. list). You can have different return type for each parameter but you can never have the same parameters. V.
______________________________________________________________

Hi,

I have a problem with overloaded functions. I defined these functions:
function val_(name: string): string;
function val_(name: string): boolean;
function val_(name: string): integer;
function val_(name: string): double;
var
  res: boolean;
begin
  res := val_(option_variable);
end;

I get the following error: Error: Incompatible types: got "ShortString" expected "Boolean". So for some reason the compiler is looking at the first function. The mode is objfpc and I turned ansistrings off. I tested by adding the overload modifier but without result. What else could I try or do? Or is overloading only allowed for different parameter lists?

Rgds, Darius

----------

Thanks! This is in line with what I was suspecting. However, why in the world does the compiler not warn in this case. This should be at least happening I would suppose?

Darius

Vojtěch Čihák schreef op 28 okt '17:

Agreed. The following incorrect override compiles without any problems. Since the second definition is inaccessible, it should probably get rejected by the compiler, or at least create a warning.

function val_(name: string): string;
begin
end;
function val_(name: string): boolean;
begin
end;