Index: include/future
===================================================================
--- include/future
+++ include/future
@@ -512,9 +512,8 @@
     virtual ~future_error() _NOEXCEPT;
 };
 
-template <future_errc _Ev>
-_LIBCPP_ALWAYS_INLINE
-void __throw_future_error()
+inline _LIBCPP_ALWAYS_INLINE
+void __throw_future_error(future_errc _Ev)
 {
 #ifndef _LIBCPP_NO_EXCEPTIONS
     throw future_error(make_error_code(_Ev));
@@ -657,7 +656,7 @@
 {
     unique_lock<mutex> __lk(this->__mut_);
     if (this->__has_value())
-        __throw_future_error<future_errc::promise_already_satisfied>();
+        __throw_future_error(future_errc::promise_already_satisfied);
     ::new(&__value_) _Rp(_VSTD::forward<_Arg>(__arg));
     this->__state_ |= base::__constructed | base::ready;
     __cv_.notify_all();
@@ -674,7 +673,7 @@
 {
     unique_lock<mutex> __lk(this->__mut_);
     if (this->__has_value())
-        __throw_future_error<future_errc::promise_already_satisfied>();
+        __throw_future_error(future_errc::promise_already_satisfied);
     ::new(&__value_) _Rp(_VSTD::forward<_Arg>(__arg));
     this->__state_ |= base::__constructed;
     __thread_local_data()->__make_ready_at_thread_exit(this);
@@ -733,7 +732,7 @@
 {
     unique_lock<mutex> __lk(this->__mut_);
     if (this->__has_value())
-        __throw_future_error<future_errc::promise_already_satisfied>();
+        __throw_future_error(future_errc::promise_already_satisfied);
     __value_ = _VSTD::addressof(__arg);
     this->__state_ |= base::__constructed | base::ready;
     __cv_.notify_all();
@@ -745,7 +744,7 @@
 {
     unique_lock<mutex> __lk(this->__mut_);
     if (this->__has_value())
-        __throw_future_error<future_errc::promise_already_satisfied>();
+        __throw_future_error(future_errc::promise_already_satisfied);
     __value_ = _VSTD::addressof(__arg);
     this->__state_ |= base::__constructed;
     __thread_local_data()->__make_ready_at_thread_exit(this);
@@ -1142,7 +1141,7 @@
     : __state_(__state)
 {
     if (__state_->__has_future_attached())
-        __throw_future_error<future_errc::future_already_retrieved>();
+        __throw_future_error(future_errc::future_already_retrieved);
     __state_->__add_shared();
     __state_->__set_future_attached();
 }
@@ -1244,7 +1243,7 @@
     : __state_(__state)
 {
     if (__state_->__has_future_attached())
-        __throw_future_error<future_errc::future_already_retrieved>();
+        __throw_future_error(future_errc::future_already_retrieved);
     __state_->__add_shared();
     __state_->__set_future_attached();
 }
@@ -1445,7 +1444,7 @@
 promise<_Rp>::get_future()
 {
     if (__state_ == nullptr)
-        __throw_future_error<future_errc::no_state>();
+        __throw_future_error(future_errc::no_state);
     return future<_Rp>(__state_);
 }
 
@@ -1454,7 +1453,7 @@
 promise<_Rp>::set_value(const _Rp& __r)
 {
     if (__state_ == nullptr)
-        __throw_future_error<future_errc::no_state>();
+        __throw_future_error(future_errc::no_state);
     __state_->set_value(__r);
 }
 
@@ -1465,7 +1464,7 @@
 promise<_Rp>::set_value(_Rp&& __r)
 {
     if (__state_ == nullptr)
-        __throw_future_error<future_errc::no_state>();
+        __throw_future_error(future_errc::no_state);
     __state_->set_value(_VSTD::move(__r));
 }
 
@@ -1476,7 +1475,7 @@
 promise<_Rp>::set_exception(exception_ptr __p)
 {
     if (__state_ == nullptr)
-        __throw_future_error<future_errc::no_state>();
+        __throw_future_error(future_errc::no_state);
     __state_->set_exception(__p);
 }
 
@@ -1485,7 +1484,7 @@
 promise<_Rp>::set_value_at_thread_exit(const _Rp& __r)
 {
     if (__state_ == nullptr)
-        __throw_future_error<future_errc::no_state>();
+        __throw_future_error(future_errc::no_state);
     __state_->set_value_at_thread_exit(__r);
 }
 
@@ -1496,7 +1495,7 @@
 promise<_Rp>::set_value_at_thread_exit(_Rp&& __r)
 {
     if (__state_ == nullptr)
-        __throw_future_error<future_errc::no_state>();
+        __throw_future_error(future_errc::no_state);
     __state_->set_value_at_thread_exit(_VSTD::move(__r));
 }
 
@@ -1507,7 +1506,7 @@
 promise<_Rp>::set_exception_at_thread_exit(exception_ptr __p)
 {
     if (__state_ == nullptr)
-        __throw_future_error<future_errc::no_state>();
+        __throw_future_error(future_errc::no_state);
     __state_->set_exception_at_thread_exit(__p);
 }
 
@@ -1605,7 +1604,7 @@
 promise<_Rp&>::get_future()
 {
     if (__state_ == nullptr)
-        __throw_future_error<future_errc::no_state>();
+        __throw_future_error(future_errc::no_state);
     return future<_Rp&>(__state_);
 }
 
@@ -1614,7 +1613,7 @@
 promise<_Rp&>::set_value(_Rp& __r)
 {
     if (__state_ == nullptr)
-        __throw_future_error<future_errc::no_state>();
+        __throw_future_error(future_errc::no_state);
     __state_->set_value(__r);
 }
 
@@ -1623,7 +1622,7 @@
 promise<_Rp&>::set_exception(exception_ptr __p)
 {
     if (__state_ == nullptr)
-        __throw_future_error<future_errc::no_state>();
+        __throw_future_error(future_errc::no_state);
     __state_->set_exception(__p);
 }
 
@@ -1632,7 +1631,7 @@
 promise<_Rp&>::set_value_at_thread_exit(_Rp& __r)
 {
     if (__state_ == nullptr)
-        __throw_future_error<future_errc::no_state>();
+        __throw_future_error(future_errc::no_state);
     __state_->set_value_at_thread_exit(__r);
 }
 
@@ -1641,7 +1640,7 @@
 promise<_Rp&>::set_exception_at_thread_exit(exception_ptr __p)
 {
     if (__state_ == nullptr)
-        __throw_future_error<future_errc::no_state>();
+        __throw_future_error(future_errc::no_state);
     __state_->set_exception_at_thread_exit(__p);
 }
 
@@ -2063,9 +2062,9 @@
 packaged_task<_Rp(_ArgTypes...)>::operator()(_ArgTypes... __args)
 {
     if (__p_.__state_ == nullptr)
-        __throw_future_error<future_errc::no_state>();
+        __throw_future_error(future_errc::no_state);
     if (__p_.__state_->__has_value())
-        __throw_future_error<future_errc::promise_already_satisfied>();
+        __throw_future_error(future_errc::promise_already_satisfied);
 #ifndef _LIBCPP_NO_EXCEPTIONS
     try
     {
@@ -2085,9 +2084,9 @@
 packaged_task<_Rp(_ArgTypes...)>::make_ready_at_thread_exit(_ArgTypes... __args)
 {
     if (__p_.__state_ == nullptr)
-        __throw_future_error<future_errc::no_state>();
+        __throw_future_error(future_errc::no_state);
     if (__p_.__state_->__has_value())
-        __throw_future_error<future_errc::promise_already_satisfied>();
+        __throw_future_error(future_errc::promise_already_satisfied);
 #ifndef _LIBCPP_NO_EXCEPTIONS
     try
     {
@@ -2107,7 +2106,7 @@
 packaged_task<_Rp(_ArgTypes...)>::reset()
 {
     if (!valid())
-        __throw_future_error<future_errc::no_state>();
+        __throw_future_error(future_errc::no_state);
     __p_ = promise<result_type>();
 }
 
@@ -2192,9 +2191,9 @@
 packaged_task<void(_ArgTypes...)>::operator()(_ArgTypes... __args)
 {
     if (__p_.__state_ == nullptr)
-        __throw_future_error<future_errc::no_state>();
+        __throw_future_error(future_errc::no_state);
     if (__p_.__state_->__has_value())
-        __throw_future_error<future_errc::promise_already_satisfied>();
+        __throw_future_error(future_errc::promise_already_satisfied);
 #ifndef _LIBCPP_NO_EXCEPTIONS
     try
     {
@@ -2215,9 +2214,9 @@
 packaged_task<void(_ArgTypes...)>::make_ready_at_thread_exit(_ArgTypes... __args)
 {
     if (__p_.__state_ == nullptr)
-        __throw_future_error<future_errc::no_state>();
+        __throw_future_error(future_errc::no_state);
     if (__p_.__state_->__has_value())
-        __throw_future_error<future_errc::promise_already_satisfied>();
+        __throw_future_error(future_errc::promise_already_satisfied);
 #ifndef _LIBCPP_NO_EXCEPTIONS
     try
     {
@@ -2238,7 +2237,7 @@
 packaged_task<void(_ArgTypes...)>::reset()
 {
     if (!valid())
-        __throw_future_error<future_errc::no_state>();
+        __throw_future_error(future_errc::no_state);
     __p_ = promise<result_type>();
 }