[libc++] Hoist extern template above first use
This function template is referenced inside class basic_string as a
friend function. The extern template declaration needs to be above that
friend declaration to actually take effect.
This is important because this function was marked as exported in
r307966, so without the extern template taking effect, it can leak into
other DSOs as a visible symbol.
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@309474 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/string b/include/string
index cf42f52..610f19e 100644
--- a/include/string
+++ b/include/string
@@ -556,6 +556,8 @@
basic_string<_CharT, _Traits, _Allocator>
operator+(const basic_string<_CharT, _Traits, _Allocator>& __x, _CharT __y);
+_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS string operator+<char, char_traits<char>, allocator<char> >(char const*, string const&))
+
template <bool>
class _LIBCPP_TEMPLATE_VIS __basic_string_common
{
@@ -3999,7 +4001,6 @@
_LIBCPP_EXTERN_TEMPLATE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_string<char>)
_LIBCPP_EXTERN_TEMPLATE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_string<wchar_t>)
-_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS string operator+<char, char_traits<char>, allocator<char> >(char const*, string const&))
#if _LIBCPP_STD_VER > 11
// Literal suffixes for basic_string [basic.string.literals]
