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-rw-r--r--include/vector23
1 files changed, 20 insertions, 3 deletions
diff --git a/include/vector b/include/vector
index 4dd0e527ff57..ded057b10c8b 100644
--- a/include/vector
+++ b/include/vector
@@ -99,7 +99,7 @@ public:
void push_back(const value_type& x);
void push_back(value_type&& x);
template <class... Args>
- reference emplace_back(Args&&... args);
+ reference emplace_back(Args&&... args); // reference in C++17
void pop_back();
template <class... Args> iterator emplace(const_iterator position, Args&&... args);
@@ -218,7 +218,7 @@ public:
const_reference back() const;
void push_back(const value_type& x);
- template <class... Args> reference emplace_back(Args&&... args); // C++14
+ template <class... Args> reference emplace_back(Args&&... args); // C++14; reference in C++17
void pop_back();
template <class... Args> iterator emplace(const_iterator position, Args&&... args); // C++14
@@ -679,7 +679,11 @@ public:
#ifndef _LIBCPP_HAS_NO_VARIADICS
template <class... _Args>
_LIBCPP_INLINE_VISIBILITY
+#if _LIBCPP_STD_VER > 14
reference emplace_back(_Args&&... __args);
+#else
+ void emplace_back(_Args&&... __args);
+#endif
#endif // _LIBCPP_HAS_NO_VARIADICS
#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
_LIBCPP_INLINE_VISIBILITY
@@ -1625,7 +1629,11 @@ vector<_Tp, _Allocator>::__emplace_back_slow_path(_Args&&... __args)
template <class _Tp, class _Allocator>
template <class... _Args>
inline
+#if _LIBCPP_STD_VER > 14
typename vector<_Tp, _Allocator>::reference
+#else
+void
+#endif
vector<_Tp, _Allocator>::emplace_back(_Args&&... __args)
{
if (this->__end_ < this->__end_cap())
@@ -1639,7 +1647,9 @@ vector<_Tp, _Allocator>::emplace_back(_Args&&... __args)
}
else
__emplace_back_slow_path(_VSTD::forward<_Args>(__args)...);
+#if _LIBCPP_STD_VER > 14
return this->back();
+#endif
}
#endif // _LIBCPP_HAS_NO_VARIADICS
@@ -2336,9 +2346,16 @@ public:
void push_back(const value_type& __x);
#if _LIBCPP_STD_VER > 11
template <class... _Args>
- _LIBCPP_INLINE_VISIBILITY reference emplace_back(_Args&&... __args) {
+#if _LIBCPP_STD_VER > 14
+ _LIBCPP_INLINE_VISIBILITY reference emplace_back(_Args&&... __args)
+#else
+ _LIBCPP_INLINE_VISIBILITY void emplace_back(_Args&&... __args)
+#endif
+ {
push_back ( value_type ( _VSTD::forward<_Args>(__args)... ));
+#if _LIBCPP_STD_VER > 14
return this->back();
+#endif
}
#endif