Re: [Boost-users] [Lambda] Handling Bind/Lambda name clashes.

Subject: Re: [Boost-users] [Lambda] Handling Bind/Lambda name clashes.
From: Robert Jones (robertgbjones_at_[hidden])
Date: 2011-04-05 09:32:27

Sorry, I should have been clearer. This is exactly the code that doesn't
work for
me, with no namespace qualification of 'bind'.

I'm guessing that the use of a Boost.Function as an argument to bind causes
the
bind in the boost namespace to be considered, as well the bind in the
boost::lambda
namespace which is considered because of the use of Boost.Lambda
placeholders.

I just can't think of a tidy solution.

Thx

- Rob.

#include <boost/lambda/lambda.hpp>
#include <boost/lambda/bind.hpp>
#include <boost/function.hpp>
#include <boost/range.hpp>
#include <vector>
#include <numeric>

// and also this...
#include <boost/bind.hpp>

struct X
{
    int f( ) const { return 1; }
};

int sum( int a, int b ) { return a + b; }

int main( )
{
    boost::lambda::placeholder1_type x;
    boost::lambda::placeholder2_type y;

    std::vector<X> v;

    boost::function<int(int, int)> my_sum = bind( sum, x, y );

    std::accumulate( boost::begin( v ), boost::end( v ), 0, bind( my_sum, x,
bind( &X::f, y ) ) );
}