> On Oct 13, 2019, at 11:11 AM, Sven Barth via fpc-pascal
> <fpc-pascal@lists.freepascal.org> wrote:
>
> Then specialize the list with the correct type.
>
> This issue *will* be fixed and is not up to discussion.
>
Here’s some code from the parser today. TFPList is being used because it’s a
generic storage for various different kinds of classes.
public
Declarations: TFPList; // list of TPasElement
// Declarations contains all the following:
Attributes, // TPasAttributes
Classes, // TPasClassType, TPasRecordType
Consts, // TPasConst
ExportSymbols,// TPasExportSymbol
Functions, // TPasProcedure
Properties, // TPasProperty
ResStrings, // TPasResString
Types, // TPasType, except TPasClassType, TPasRecordType
Variables // TPasVariable, not descendants
: TFPList;
What do I do when I want to iterate over this now? I know that these types all
descend from TPasElement so I want to use that, but no, the compiler complains
I *must* use a pointer for the iterator. Why can’t I as the programmer tell the
for loop I know what the enumerator is going to return?
var
element: TPasElement;
begin
// ERROR!
for element in module.InterfaceSection.Functions do
begin
end;
I guess we’re supposed to just do our typecasts inside the loop now but how is
this any better? Sorry I’m really not getting this.
var
element: pointer;
begin
for element in module.InterfaceSection.Functions do
begin
writeln(TPasElement(element).Name, ‘’, TPasElement(element).DoSomething);
end;
Regards,
Ryan Joseph
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