On 24/03/2023 15:04, Benito van der Zander via fpc-pascal wrote:
why is a pointer to a char not a pchar (for type helpers)?
My guess: For the same reason that "p2" fails in the below. Distinct type.
May be assignment compatible, but a type of it's own.
Imagine you had a different helper, with a different "toString" on
pchar2, then which one should @char get?
program Project1;
{$Mode objfpc}{$H+} {$ModeSwitch typehelpers}
type
pchar = ^char;
pchar2 = ^char;
type TPcharHelper = type helper for pchar
function toString(length: integer): string;
end;
function TPcharHelper.toString(length: integer): string;
begin
end;
var
p: pchar;
p2: pchar2;
begin
p.toString(1);
p2.toString(1); // error
end.
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