+2015-08-13 Ville Voutilainen <ville.voutilainen@gmail.com>
+
+ Implement std::experimental::fundamentals_v2::make_array and
+ std::experimental::fundamentals_v2::to_array.
+ * include/Makefile.am: Add array.
+ * include/Makefile.in: Add array.
+ * include/experimental/array: New.
+ * testsuite/experimental/array/make_array.cc: Likewise.
+ * testsuite/experimental/array/neg.cc: Likewise.
+ * doc/html/manual/status.html: Mark make_array as Y.
+ * doc/xml/manual/status_cxx2017.xml: Likewise.
+
2015-08-13 Jonathan Wakely <jwakely@redhat.com>
* include/bits/alloc_traits.h: Add feature-test macro.
<a class="link" href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2015/n4391.html" target="_top">
N4391
</a>
- </td><td align="left"> <code class="code">make_array</code>, revision 4 </td><td align="left">Y (not committed yet)</td><td align="left">Library Fundamentals 2 TS</td></tr><tr><td align="left">
+ </td><td align="left"> <code class="code">make_array</code>, revision 4 </td><td align="left">Y</td><td align="left">Library Fundamentals 2 TS</td></tr><tr><td align="left">
<a class="link" href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2015/n4502.pdf" target="_top">
N4502
</a>
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Introduction
- </td><td width="20%" align="center"><a accesskey="h" href="../index.html">Home</a></td><td width="40%" align="right" valign="top"> License</td></tr></table></div></body></html>
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+ </td><td width="20%" align="center"><a accesskey="h" href="../index.html">Home</a></td><td width="40%" align="right" valign="top"> License</td></tr></table></div></body></html>
</link>
</entry>
<entry> <code>make_array</code>, revision 4 </entry>
- <entry>Y (not committed yet)</entry>
+ <entry>Y</entry>
<entry>Library Fundamentals 2 TS</entry>
</row>
experimental_headers = \
${experimental_srcdir}/algorithm \
${experimental_srcdir}/any \
+ ${experimental_srcdir}/array \
${experimental_srcdir}/chrono \
${experimental_srcdir}/deque \
${experimental_srcdir}/erase_if.h \
experimental_headers = \
${experimental_srcdir}/algorithm \
${experimental_srcdir}/any \
+ ${experimental_srcdir}/array \
${experimental_srcdir}/chrono \
${experimental_srcdir}/deque \
${experimental_srcdir}/erase_if.h \
--- /dev/null
+// <experimental/array> -*- C++ -*-
+
+// Copyright (C) 2015 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.
+
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+// <http://www.gnu.org/licenses/>.
+
+/** @file experimental/array
+ * This is a TS C++ Library header.
+ */
+
+#ifndef _GLIBCXX_EXPERIMENTAL_ARRAY
+#define _GLIBCXX_EXPERIMENTAL_ARRAY 1
+
+#pragma GCC system_header
+
+#if __cplusplus <= 201103L
+# include <bits/c++14_warning.h>
+#else
+
+#include <array>
+#include <functional>
+#include <experimental/type_traits>
+
+namespace std _GLIBCXX_VISIBILITY(default)
+{
+namespace experimental
+{
+inline namespace fundamentals_v2
+{
+_GLIBCXX_BEGIN_NAMESPACE_VERSION
+
+ /**
+ * @defgroup make_array Array creation functions
+ * @ingroup experimental
+ *
+ * Array creation functions as described in N4529,
+ * Working Draft, C++ Extensions for Library Fundamentals, Version 2
+ *
+ * @{
+ */
+
+template <typename _Up>
+ struct __is_reference_wrapper : false_type
+ {};
+
+template <typename _Up>
+ struct __is_reference_wrapper<reference_wrapper<_Up>> : true_type
+ {};
+
+template <typename _Dest = void, typename... _Types>
+ constexpr auto
+ make_array(_Types&&... __t)
+ -> array<conditional_t<is_void_v<_Dest>,
+ common_type_t<_Types...>,
+ _Dest>,
+ sizeof...(_Types)>
+ {
+ static_assert(__or_<
+ __not_<is_void<_Dest>>,
+ __and_<__not_<__is_reference_wrapper<decay_t<_Types>>>...>>
+ ::value,
+ "make_array cannot be used without an explicit target type "
+ "if any of the types given is a reference_wrapper");
+ return {{forward<_Types>(__t)...}};
+ }
+
+template <typename _Tp, size_t _Nm, size_t... _Idx>
+ constexpr array<remove_cv_t<_Tp>, _Nm>
+ __to_array(_Tp (&__a)[_Nm],
+ index_sequence<_Idx...>)
+ {
+ return {{__a[_Idx]...}};
+ }
+
+template <typename _Tp, size_t _Nm>
+ constexpr array<remove_cv_t<_Tp>, _Nm>
+ to_array(_Tp (&__a)[_Nm])
+ {
+ return __to_array(__a, make_index_sequence<_Nm>{});
+ }
+
+ // @} group make_array
+ _GLIBCXX_END_NAMESPACE_VERSION
+} // namespace fundamentals_v2
+} // namespace experimental
+
+} // namespace std
+
+#endif // C++14
+
+#endif // _GLIBCXX_EXPERIMENTAL_ARRAY
--- /dev/null
+// { dg-options "-std=gnu++14" }
+// { dg-do compile }
+
+// Copyright (C) 2015 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 moved_to of the GNU General Public License along
+// with this library; see the file COPYING3. If not see
+// <http://www.gnu.org/licenses/>.
+
+#include <experimental/array>
+
+struct MoveOnly
+{
+ MoveOnly() = default;
+ MoveOnly(MoveOnly&&) = default;
+ MoveOnly& operator=(MoveOnly&&) = default;
+};
+
+int main()
+{
+ char x[42];
+ std::array<char, 42> y = std::experimental::to_array(x);
+ std::array<int, 5> z = std::experimental::make_array(1,2,3,4,5);
+ std::array<long, 3> zz = std::experimental::make_array(1,2L, 3);
+ std::array<MoveOnly, 1> zzz = std::experimental::make_array(MoveOnly{});
+ int dummy;
+ auto good = std::experimental::make_array<
+ std::reference_wrapper<int>>(std::ref(dummy));
+ constexpr char x2[42]{};
+ constexpr std::array<char, 42> y2 = std::experimental::to_array(x2);
+ constexpr std::array<int, 5> z2 =
+ std::experimental::make_array(1,2,3,4,5);
+ constexpr std::array<long, 3> zz2
+ = std::experimental::make_array(1,2L, 3);
+ constexpr std::array<MoveOnly, 1> zzz2 = std::experimental::make_array(MoveOnly{});
+}
--- /dev/null
+// { dg-options "-std=gnu++14" }
+// { dg-do compile }
+
+// Copyright (C) 2015 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 moved_to of the GNU General Public License along
+// with this library; see the file COPYING3. If not see
+// <http://www.gnu.org/licenses/>.
+
+#include <experimental/array>
+
+int main()
+{
+ int dummy;
+ auto bad = std::experimental::make_array(std::ref(dummy));
+ // { dg-error "make_array cannot be used without an explicit target type if any of the types given is a reference_wrapper" "" { target *-*-* } 76 }
+}
--- /dev/null
+ .file "neg.cc"
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