id,summary,reporter,owner,description,type,status,milestone,component,version,severity,resolution,keywords,cc
4566,Binding to a class member with lambda::bind() can cause const qualifier mismatch.,David Larsson <david.larsson@…>,No-Maintainer,"The following code (omitting namespaces) would compile correctly in Boost 1.43.0, but now fails with error ''boost/lambda/detail/function_adaptors.hpp(264) : error C2440
: 'return' : cannot convert from 'const int' to 'int &''':
{{{
bind( &pair<int,int>::first, _1 )( make_pair( 1, 0 ) );
}}}
The `boost::lambda::bind()` expression creates a function that returns the first element of a pair, and then applies this to a `const pair<int,int>`. The following will work, because the argument is not constant:
{{{
pair<int,int> x(1,0);
bind( &pair<int,int>::first, _1 )( x );
}}}

A workaround for this issue is to specify the return value of `bind()` explicitly, but it shouldn't be necessary for this simple case:
{{{
bind<int>( &pair<int,int>::first, _1 )( make_pair( 1, 0 ) );
}}}

I have tested this on VC8 and VC10 with identical results.

Thanks for a great library,

''/David''",Bugs,closed,To Be Determined,lambda,Boost 1.44.0,Problem,fixed,,