From: Jens Maurer (Jens.Maurer_at_[hidden])
Date: 2001-05-18 17:02:28
David Abrahams wrote:
> This section of Stroustrup's book is highly confusing. If anyone can fill in
> details from the standard to explain what's going on, I'd be indebted.
184.108.40.206p3 is, I believe, sufficiently clear. Please read that section
together with 3.4.2p1.
> In the quoted example, what namespace does "void f(const X&)" get declared
The innermost enclosing namespace, which is the namespace for class X.
However, the declaration there is hidden from normal lookup unless there
is a matching namespace-level declaration either before or after the
> If it /is/ declared in X's namespace, then how does it differ from "void
Because argument-dependent lookup never looks into the namespace of
class X for f(), because f() has no arguments for whose types namespaces
could be considered for Koenig lookup.
> Are these friend functions "special" in that they are marked to not be found
> through ordinary name lookup in the scope of their declarer, but only
> through argument-dependent name lookup?
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