Provide hashers for string_view only if they are using the default char_traits. Seen on SO: test/std/strings/string.view/string.view.hash/char_type.hash.fail.cpp
llvm-svn: 364545
diff --git a/libcxx/include/string_view b/libcxx/include/string_view
index aa93e1f..0444831 100644
--- a/libcxx/include/string_view
+++ b/libcxx/include/string_view
@@ -776,12 +776,12 @@
typedef basic_string_view<wchar_t> wstring_view;
// [string.view.hash]
-template<class _CharT, class _Traits>
-struct _LIBCPP_TEMPLATE_VIS hash<basic_string_view<_CharT, _Traits> >
- : public unary_function<basic_string_view<_CharT, _Traits>, size_t>
+template<class _CharT>
+struct _LIBCPP_TEMPLATE_VIS hash<basic_string_view<_CharT, char_traits<_CharT> > >
+ : public unary_function<basic_string_view<_CharT, char_traits<_CharT> >, size_t>
{
_LIBCPP_INLINE_VISIBILITY
- size_t operator()(const basic_string_view<_CharT, _Traits> __val) const _NOEXCEPT {
+ size_t operator()(const basic_string_view<_CharT, char_traits<_CharT> > __val) const _NOEXCEPT {
return __do_string_hash(__val.data(), __val.data() + __val.size());
}
};