On 28/10/17 23:54, Darius Blaszyk wrote:
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:
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.
______________________________________________________________
> Od: Darius Blaszyk <dhkblas...@zeelandnet.nl>
> Komu: FPC-Pascal users discussions <fpc-pascal@lists.freepascal.org>
> Datum: 28.10.2017 22:58
> Předmět: [fpc-pascal] Overloaded functions
>
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
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;
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