Handle C++03

ldionne · ldionne · commit ddb387b9bc40 · 2025-01-13T14:14:58.000-05:00
diff --git a/libcxx/include/__vector/vector.h b/libcxx/include/__vector/vector.h
@@ -781,11 +781,13 @@ class _LIBCPP_TEMPLATE_VIS vector {
   _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI void __move_assign_alloc(vector&, false_type) _NOEXCEPT {}
 
   static _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI pointer __add_alignment_assumption(pointer __p) _NOEXCEPT {
+#ifndef _LIBCPP_CXX03_LANG
     if constexpr (is_pointer<pointer>::value) {
       if (!__libcpp_is_constant_evaluated()) {
         return static_cast<pointer>(__builtin_assume_aligned(__p, alignof(decltype(*__p))));
       }
     }
+#endif
     return __p;
   }
 };

Original file line number	Diff line number	Diff line change
`@@ -781,11 +781,13 @@ class _LIBCPP_TEMPLATE_VIS vector {`
`781`	`781`	`_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI void __move_assign_alloc(vector&, false_type) _NOEXCEPT {}`
`782`	`782`
`783`	`783`	`static _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI pointer __add_alignment_assumption(pointer __p) _NOEXCEPT {`
	`784`	`+#ifndef _LIBCPP_CXX03_LANG`
`784`	`785`	`if constexpr (is_pointer<pointer>::value) {`
`785`	`786`	`if (!__libcpp_is_constant_evaluated()) {`
`786`	`787`	`return static_cast<pointer>(__builtin_assume_aligned(__p, alignof(decltype(*__p))));`
`787`	`788`	`}`
`788`	`789`	`}`
	`790`	`+#endif`
`789`	`791`	`return __p;`
`790`	`792`	`}`
`791`	`793`	`};`