Talk:for-in loop

Proposed extensions - Select which enumerator to use

Why so complicated syntax and new keyword using? Why do not just always use syntax like for x in <IEnumeratorExpression> do ...;, as described in Variant3 and Variant4? In this case no need to introduce any FPC-specific operator (or just to describe default enumerator, to make text shorter?..), no need 'enumerator MoveNext' and 'enumerator Current' modifiers, because interface implementation already can be mapped to other methods... --Nashev 18:43, 12 September 2011 (CEST)

Proposed extensions - index

May be more pretty will python or php-like syntax for ch[i] in s do Writeln(i, ': ', ch); (see http://www.php2python.com/wiki/control-structures.foreach/ for reference) --Nashev 18:43, 12 September 2011 (CEST)

Multiple enumerators for one class

The underlying code causes a memory leak:

function TEnumerableTree.GetReverseEnumerator: TTreeReverseEnumerator;
begin
  Result:=TTreeReverseEnumerator.Create(Self);
end;

object created, but not destroyed

Loop variables are temporary copies of the container value

Any reason NOT to declare PointerAddress as PtrUInt?