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From: Stefan Slapeta (stefan_nospam__at_[hidden])
Date: 2004-11-29 17:53:05

Peter Dimov wrote:
> Currently boost/ appears to contain 98 header files. Bringing this down
> to 97 wouldn't be much of an improvement.

I didn't propose to delete the old one.

> You bring up the legitimate problem of bind's _1 clashing with lambda's
> _1 (when "using namespace boost::lambda" is in effect), but I totally
> don't see what this has to do with moving boost::bind to boost::bind::bind.


boost::lambda::bind, boost::bind::bind (or maybe boost::function::bind
and also include boost.function library there)

> To answer your specific question, ::_1 selects the Bind placeholder and
> boost::lambda::_1 selects Lambda's one; consequently, "using ::_1" is an
> using declaration for Bind's _1, and "using boost::lambda::_1" is the
> using declaration for its Lambda counterpart. I only tested them on VC
> 7.1, though; maybe your compiler doesn't accept them?

This might be a different discussion but I simply don't understand what
are the rules for putting boost.bind and boost.function in the 'global'
boost namespace and many other libraries not. Historical reasons? A
matter of interface size?

> Probably not. You'll use "using namespace boost::placeholders" instead,
> when bind is modified to conform a bit more closely to TR1. The problem
> is that this breaks existing code. Of course when you have two using
> directives, one for Bind and one for Lambda, _1 will once again become
> ambiguous.

There will be other headers for the TR1 implementations, so breaking
existing code is not so much my problem.


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