Compile error due to `deduce_char_traits` ambiguity

[Michel Morin <mimomorin@…>]

The following code fails to compile due to deduce_char_traits ambiguity:

#include <iostream>
#include <string>

#include <boost/container/string.hpp>
#include <boost/lexical_cast.hpp>

int main (int argc, char* argv[])
{
    std::string str;
    boost::container::string str_;
    
    std::cout << boost::lexical_cast<std::string>(str_) << std::endl;
    
    return 0;
}

[Antony Polukhin]

Test case added in r76817

[Antony Polukhin]

(In [76818]) FIxes #6453 (compile error due to deduce_char_traits ambiguity)

[Antony Polukhin]

(In [76887]) Merge from trunk (fixed #6251, fixed #6453, disabled some optimizations for sunCC #6462)