On Sun, 8 May 2022, Hairy Pixels via fpc-devel wrote:
Basically it looks like multi helpers don’t actually work with overloaded
methods and simply choses the last helper declared. Should I fix this? Seems
unlikely we would not notice this before but maybe we did.
{$modeswitch typehelpers}
{$modeswitch multihelpers}
type
TMyHelper1 = type helper for integer
procedure DoThis(f: integer);
end;
TMyHelper2 = type helper for integer
procedure DoThis(f: string);
end;
procedure TMyHelper1.DoThis(f: integer);
begin
writeln(self, ' => ', f);
end;
procedure TMyHelper2.DoThis(f: string);
begin
writeln(self, ' => ', f);
end;
var
i: integer = 0;
begin
i.DoThis(0); // Got "ShortInt", expected “ShortString"
If you fix this, then I think you should make sure it is only done when the
overload; keyword is present. For regular classes, searching for an overload match
stops also at the current class (? unit) if the overload keyword is not present.
Michael.
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