Use SFINAE to avoid errors in C++03 mode and std::pair

Author: igaztanaga

test/emplace_test.hpp

@@ -15,6 +15,7 @@
 #include <boost/container/detail/config_begin.hpp>
 #include <boost/container/detail/workaround.hpp>
 #include <boost/container/detail/mpl.hpp>
+#include <boost/container/detail/is_pair.hpp>
 #include <boost/move/utility_core.hpp>
 #include <boost/container/detail/type_traits.hpp>
 #include <boost/move/detail/launder.hpp> //adl_move_swap
@@ -101,7 +102,8 @@ enum EmplaceOptions{
 };
 
 template<class Container>
-bool test_expected_container(const Container &ec, const EmplaceInt *Expected, unsigned int only_first_n, unsigned int cont_offset = 0)
+typename boost::container::dtl::enable_if_c< !boost::container::dtl::is_pair<typename Container::value_type>::value, bool>::type
+   test_expected_container(const Container &ec, const EmplaceInt *Expected, unsigned int only_first_n, unsigned int cont_offset = 0)
 {
    typedef typename Container::const_iterator const_iterator;
    const_iterator itb(ec.begin()), ite(ec.end());
@@ -125,7 +127,8 @@ bool test_expected_container(const Container &ec, const EmplaceInt *Expected, un
 }
 
 template<class Container>
-bool test_expected_container(const Container &ec, const std::pair<EmplaceInt, EmplaceInt> *Expected, unsigned int only_first_n)
+typename boost::container::dtl::enable_if_c<boost::container::dtl::is_pair<typename Container::value_type>::value, bool>::type
+   test_expected_container(const Container &ec, const std::pair<EmplaceInt, EmplaceInt> *Expected, unsigned int only_first_n)
 {
    typedef typename Container::const_iterator const_iterator;
    const_iterator itb(ec.begin()), ite(ec.end());