Author: marshall
Date: Tue Mar 20 16:02:53 2018
New Revision: 328059
URL: http://llvm.org/viewvc/llvm-project?rev=328059&view=rev
Log:
Implement LWG3035: std::allocator's constructors should be constexpr.
Added:
libcxx/trunk/test/std/utilities/memory/default.allocator/allocator.ctor.pass.cpp
Modified:
libcxx/trunk/include/memory
Modified: libcxx/trunk/include/memory
URL:
http://llvm.org/viewvc/llvm-project/libcxx/trunk/include/memory?rev=328059&r1=328058&r2=328059&view=diff
==============================================================================
--- libcxx/trunk/include/memory (original)
+++ libcxx/trunk/include/memory Tue Mar 20 16:02:53 2018
@@ -126,9 +126,10 @@ public:
template <class U> struct rebind {typedef allocator<U> other;};
- allocator() noexcept;
- allocator(const allocator&) noexcept;
- template <class U> allocator(const allocator<U>&) noexcept;
+ constexpr allocator() noexcept; // constexpr in C++20
+ constexpr allocator(const allocator&) noexcept; // constexpr in C++20
+ template <class U>
+ constexpr allocator(const allocator<U>&) noexcept; // constexpr in C++20
~allocator();
pointer address(reference x) const noexcept;
const_pointer address(const_reference x) const noexcept;
@@ -1778,8 +1779,13 @@ public:
template <class _Up> struct rebind {typedef allocator<_Up> other;};
- _LIBCPP_INLINE_VISIBILITY allocator() _NOEXCEPT {}
- template <class _Up> _LIBCPP_INLINE_VISIBILITY allocator(const
allocator<_Up>&) _NOEXCEPT {}
+ _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
+ allocator() _NOEXCEPT {}
+
+ template <class _Up>
+ _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
+ allocator(const allocator<_Up>&) _NOEXCEPT {}
+
_LIBCPP_INLINE_VISIBILITY pointer address(reference __x) const _NOEXCEPT
{return _VSTD::addressof(__x);}
_LIBCPP_INLINE_VISIBILITY const_pointer address(const_reference __x) const
_NOEXCEPT
@@ -1877,8 +1883,13 @@ public:
template <class _Up> struct rebind {typedef allocator<_Up> other;};
- _LIBCPP_INLINE_VISIBILITY allocator() _NOEXCEPT {}
- template <class _Up> _LIBCPP_INLINE_VISIBILITY allocator(const
allocator<_Up>&) _NOEXCEPT {}
+ _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
+ allocator() _NOEXCEPT {}
+
+ template <class _Up>
+ _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
+ allocator(const allocator<_Up>&) _NOEXCEPT {}
+
_LIBCPP_INLINE_VISIBILITY const_pointer address(const_reference __x) const
_NOEXCEPT
{return _VSTD::addressof(__x);}
_LIBCPP_INLINE_VISIBILITY pointer allocate(size_type __n,
allocator<void>::const_pointer = 0)
Added:
libcxx/trunk/test/std/utilities/memory/default.allocator/allocator.ctor.pass.cpp
URL:
http://llvm.org/viewvc/llvm-project/libcxx/trunk/test/std/utilities/memory/default.allocator/allocator.ctor.pass.cpp?rev=328059&view=auto
==============================================================================
---
libcxx/trunk/test/std/utilities/memory/default.allocator/allocator.ctor.pass.cpp
(added)
+++
libcxx/trunk/test/std/utilities/memory/default.allocator/allocator.ctor.pass.cpp
Tue Mar 20 16:02:53 2018
@@ -0,0 +1,50 @@
+//===----------------------------------------------------------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// <memory>
+// UNSUPPORTED: c++98, c++03, c++11, c++14, c++17
+//
+// template <class T>
+// class allocator
+// {
+// public: // All of these are constexpr after C++17
+// constexpr allocator() noexcept;
+// constexpr allocator(const allocator&) noexcept;
+// template<class U> constexpr allocator(const allocator<U>&) noexcept;
+// ...
+// };
+
+#include <memory>
+#include <cstddef>
+
+#include "test_macros.h"
+
+
+int main()
+{
+ {
+ typedef std::allocator<char> AC;
+ typedef std::allocator<long> AL;
+
+ constexpr AC a1;
+ constexpr AC a2{a1};
+ constexpr AL a3{a2};
+ (void) a3;
+ }
+ {
+ typedef std::allocator<const char> AC;
+ typedef std::allocator<const long> AL;
+
+ constexpr AC a1;
+ constexpr AC a2{a1};
+ constexpr AL a3{a2};
+ (void) a3;
+ }
+
+}
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