RE: Boost algorithm library (Was: [boost] New upload: algorithm.z ip 1)

From: Aleksey Gurtovoy (alexy_at_[hidden])
Date: 2001-07-30 09:41:17

Peter Dimov wrote:
> True, but you can make it visible with an 'using' directive, 
> causing an ambiguity:
> 
> namespace N
> {
>   struct f {};
> }
> 
> void f(int);
> 
> using namespace N;
> 
> int main()
> {
>   f(1);
> }
> 
> So if #218 alters the Koenig lookup to apply to names (for 
> consistency), non-functions would cause an ambiguity 
> regardless of whether they have the right "signature" 
> (assuming that they can handle operator() at all.)

They would not :), see 3.4.2 [basic.lookup.koenig] para 3:

3  When considering an associated namespace, the lookup is the same as the
lookup performed when the associated namespace is used as a qualifier
(3.4.3.2) except that:
        - Any using directives in the associated namespace are ignored.
        - ...

> 
> Any proposal that features unqualified calls is affected by 
> this issue.

In any case, may be I am full of FUD too, but I feel a little bit
uncomfortable about applying the technique that is based on so subtle
details of the language.

Aleksey