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c++ Programming Glossary: feature_testSFINAE: checking the existence of a function breaks when the overload is moved to other namespaces http://stackoverflow.com/questions/18933857/sfinae-checking-the-existence-of-a-function-breaks-when-the-overload-is-moved-t namespace note the global scope . breaks namespace feature_test namespace detail_overload template typename... Args void bar.. detail_overload using namespace foo ... breaks namespace feature_test template typename... Args void bar Args ... namespace detail.. template typename... Args void bar Args ... namespace feature_test namespace detail using namespace foo ... works namespace detail_overload..
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