C++17 GB50 resolution (P0505R0)

2017-02-19  Dinka Ranns  <dinka.ranns@googlemail.com>

	C++17 GB50 resolution
	* include/std/chrono (duration::operator++()): Add
	_GLIBCXX17_CONSTEXPR.
	(duration::operator++(int)): Likewise.
	(duration::operator--()): Likewise.
	(duration::operator--(int)): Likewise.
	(duration::operator+=(const duration&)): Likewise.
	(duration::operator-=(const duration&)): Likewise.
	(duration::operator*=(const rep&)): Likewise.
	(duration::operator/=(const rep&)): Likewise.
	(duration::operator%=(const rep&)): Likewise.
	(duration::operator%=(const duration&)): Likewise.
	(time_point::operator+=(const duration&)): Likewise.
	(time_point::operator-=(const duration&)): Likewise.
	* testsuite/20_util/duration/arithmetic/constexpr_c++17.cc: New test.
	* testsuite/20_util/duration/literals/range.cc: Adjust dg-error.
	* testsuite/20_util/time_point/arithmetic/constexpr.cc: New test.

From-SVN: r245575

libstdc++-v3/ChangeLog

+2017-02-19  Dinka Ranns  <dinka.ranns@googlemail.com>
+
+	C++17 GB50 resolution
+	* include/std/chrono (duration::operator++()): Add
+	_GLIBCXX17_CONSTEXPR.
+	(duration::operator++(int)): Likewise.
+	(duration::operator--()): Likewise.
+	(duration::operator--(int)): Likewise.
+	(duration::operator+=(const duration&)): Likewise.
+	(duration::operator-=(const duration&)): Likewise.
+	(duration::operator*=(const rep&)): Likewise.
+	(duration::operator/=(const rep&)): Likewise.
+	(duration::operator%=(const rep&)): Likewise.
+	(duration::operator%=(const duration&)): Likewise.
+	(time_point::operator+=(const duration&)): Likewise.
+	(time_point::operator-=(const duration&)): Likewise.
+	* testsuite/20_util/duration/arithmetic/constexpr_c++17.cc: New test.
+	* testsuite/20_util/duration/literals/range.cc: Adjust dg-error.
+	* testsuite/20_util/time_point/arithmetic/constexpr.cc: New test.
+
 2017-02-19  Gerald Pfeifer  <gerald@pfeifer.com>
 
 	* doc/xml/manual/debug.xml: Adjust link to ThreadSanitizer.

libstdc++-v3/include/std/chrono

@@ -349,50 +349,50 @@ _GLIBCXX_END_NAMESPACE_VERSION
 	operator-() const
 	{ return duration(-__r); }
 
-	duration&
+	_GLIBCXX17_CONSTEXPR duration&
 	operator++()
 	{
 	  ++__r;
 	  return *this;
 	}
 
-	duration
+	_GLIBCXX17_CONSTEXPR duration
 	operator++(int)
 	{ return duration(__r++); }
 
-	duration&
+	_GLIBCXX17_CONSTEXPR duration&
 	operator--()
 	{
 	  --__r;
 	  return *this;
 	}
 
-	duration
+	_GLIBCXX17_CONSTEXPR duration
 	operator--(int)
 	{ return duration(__r--); }
 
-	duration&
+	_GLIBCXX17_CONSTEXPR duration&
 	operator+=(const duration& __d)
 	{
 	  __r += __d.count();
 	  return *this;
 	}
 
-	duration&
+	_GLIBCXX17_CONSTEXPR duration&
 	operator-=(const duration& __d)
 	{
 	  __r -= __d.count();
 	  return *this;
 	}
 
-	duration&
+	_GLIBCXX17_CONSTEXPR duration&
 	operator*=(const rep& __rhs)
 	{
 	  __r *= __rhs;
 	  return *this;
 	}
 
-	duration&
+	_GLIBCXX17_CONSTEXPR duration&
 	operator/=(const rep& __rhs)
 	{
 	  __r /= __rhs;
@@ -401,6 +401,7 @@ _GLIBCXX_END_NAMESPACE_VERSION
 
 	// DR 934.
 	template<typename _Rep2 = rep>
+	  _GLIBCXX17_CONSTEXPR
 	  typename enable_if<!treat_as_floating_point<_Rep2>::value,
 			     duration&>::type
 	  operator%=(const rep& __rhs)
@@ -410,6 +411,7 @@ _GLIBCXX_END_NAMESPACE_VERSION
 	  }
 
 	template<typename _Rep2 = rep>
+	  _GLIBCXX17_CONSTEXPR
 	  typename enable_if<!treat_as_floating_point<_Rep2>::value,
 			     duration&>::type
 	  operator%=(const duration& __d)
@@ -631,14 +633,14 @@ _GLIBCXX_END_NAMESPACE_VERSION
 	{ return __d; }
 
 	// arithmetic
-	time_point&
+	_GLIBCXX17_CONSTEXPR time_point&
 	operator+=(const duration& __dur)
 	{
 	  __d += __dur;
 	  return *this;
 	}
 
-	time_point&
+	_GLIBCXX17_CONSTEXPR time_point&
 	operator-=(const duration& __dur)
 	{
 	  __d -= __dur;

libstdc++-v3/testsuite/20_util/duration/arithmetic/constexpr_c++17.cc

+// { dg-options "-std=gnu++17" }
+// { dg-do compile { target c++1z } }
+
+// Copyright (C) 2011-2017 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library.  This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3.  If not see
+// <http://www.gnu.org/licenses/>.
+
+#include <chrono>
+#include <testsuite_common_types.h>
+constexpr auto test_operators()
+{
+  std::chrono::nanoseconds d1 { 1 };
+  d1++;
+  ++d1;
+  d1--;
+  --d1;
+
+  auto d2(d1);
+
+  d1+=d2;
+  d1-=d2;
+
+  d1*=1;
+  d1/=1;
+  d1%=1;
+  d1%=d2;
+
+  return d1;
+}
+
+constexpr auto d4 = test_operators();
+

libstdc++-v3/testsuite/20_util/duration/literals/range.cc

@@ -26,6 +26,6 @@ test01()
 
   // std::numeric_limits<int64_t>::max() == 9223372036854775807;
   auto h = 9223372036854775808h;
-  // { dg-error "cannot be represented" "" { target *-*-* } 890 }
+  // { dg-error "cannot be represented" "" { target *-*-* } 892 }
 }
 // { dg-prune-output "in constexpr expansion" } // needed for -O0

libstdc++-v3/testsuite/20_util/time_point/arithmetic/constexpr.cc

+// { dg-options "-std=gnu++17" }
+// { dg-do compile { target c++1z } }
+
+// Copyright (C) 2011-2016 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library.  This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3.  If not see
+// <http://www.gnu.org/licenses/>.
+
+#include <chrono>
+#include <testsuite_common_types.h>
+constexpr auto test_operators()
+{
+  using namespace std::chrono;
+  nanoseconds d1 { };
+  time_point<system_clock> c1 { };
+
+  c1+=d1;
+  c1-=d1;
+
+
+  return 11;
+}
+
+constexpr auto a = test_operators();