Constrain __bind functor constructor such that it won't accidentally get used as a copy constructor from a non-const lvalue. Fixes <rdar://problem/11359080>.
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@156182 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/functional b/include/functional
index 884a577..495ca7c 100644
--- a/include/functional
+++ b/include/functional
@@ -1707,7 +1707,11 @@
#endif // _LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS
- template <class _Gp, class ..._BA>
+ template <class _Gp, class ..._BA,
+ class = typename enable_if
+ <
+ is_constructible<_Fd, _Gp>::value
+ >::type>
_LIBCPP_INLINE_VISIBILITY
explicit __bind(_Gp&& __f, _BA&& ...__bound_args)
: __f_(_VSTD::forward<_Gp>(__f)),