Ah, Ok thanks!
> On Oct 20, 2024, at 3:32 PM, Martin Frb via fpc-pascal
> <fpc-pascal@lists.freepascal.org> wrote:
>
> The compare function is declared right inside the class
>
> { TFPGList }
>
> generic TFPGList<T> = class(TFPSList)
> private
> type
> TCompareFunc = function(const Item1, Item2: T): Integer;
>
>
> "T" is from the generic, so if you specialized with string, then T is string.
>
> It is a function, not a method (i.e. not part of a class)
>
>
> On 21/10/2024 00:17, ppadilcdx--- via fpc-pascal wrote:
>> Just tried to compile a short program with that definition of compare:
>> TCompareFunc, and that is the wrong type for TFPGList<String> in my program
>> (yes there is a better class for strings but I just wanted a quick example
>> program to compile). FPC error message says it wants:
>> function(const ShortString;const ShortString):LongInt,
>> so only two non-pointer input parameters. Must be another definition
>> somewhere.
>>> type TFPSListCompareFunc = function(
>>> Key1: Pointer;
>>> Key2: Pointer
>>> ):Integer of object;
>>>
>>> Two questions.
>>> 1) Should TCompareFunc in TFPGList.Sort be one of the above types, or is
>>> there another definition somewhere?
>>> 2) What is an “Integer of object” in TFPSListCompareFunc? (I expect it to
>>> be a typo but then I’m fairly new to free pascal so I might have missed the
>>> memo.)
>>>
>>>
>>>
>
> Of object belongs to the function (the entire function declaration before),
> not just the "integer".
> So that function must be a method of a class.
> _______________________________________________
> fpc-pascal maillist - fpc-pascal@lists.freepascal.org
> https://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
_______________________________________________
fpc-pascal maillist - fpc-pascal@lists.freepascal.org
https://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
