[fpc-devel] Implicit function specialization precedence

Sven Barth pascaldragon at googlemail.com
Sun Apr 11 23:33:19 CEST 2021

Am 11.04.2021 um 22:27 schrieb Ryan Joseph via fpc-devel:
>> On Apr 10, 2021, at 9:47 AM, Ryan Joseph <genericptr at gmail.com> wrote:
>> Just checked and pass_typecheck is called before overloading but ado_IsVariant is simply never set for that array. In tarraydef.GetTypeName you can see that "array of const" is associated with many flags so maybe we need to make a new flag which means "non-uniform elements"? I could probably easily build that into pass_typecheck for array constructors.
>> ...
>>           if (ado_isarrayofconst in arrayoptions) or
>>                  (ado_isConstructor in arrayoptions) then
>>            begin
>>              if (ado_isvariant in arrayoptions) or ((highrange=-1) and (lowrange=0)) then
>>                GetTypeName:='Array Of Const'
>>              else
>>                GetTypeName:='{Array Of Const/Constant Open} Array of '+elementdef.typename;
>>            end
> Any word on what I should do about this? If those flags present are not sufficient I'll add another flag but if that's not acceptable I'll simply have to allow the user to specialize with these array types, even though they will fail later one when the function is selected during overloading. Once I know that I'll submit another patch including the other changes that were requested.
Looking at it, it could be that there is a bug in 
tarrayconstructornode.pass_typecheck that hasn't really surfaced yet... 
I'll have to look at that first, but I don't know when I'll have the 
time for that.


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