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* [gcc r11-3652] libstdc++: Test C++11 implementation of std::chrono::__detail::ceil
@ 2020-10-05 10:32 Jonathan Wakely
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From: Jonathan Wakely @ 2020-10-05 10:32 UTC (permalink / raw)
To: gcc-cvs, libstdc++-cvs
https://gcc.gnu.org/g:d5243c46266f92f8e5373c3f314aa2abc15c9db4
commit r11-3652-gd5243c46266f92f8e5373c3f314aa2abc15c9db4
Author: Mike Crowe <mac@mcrowe.com>
Date: Mon Oct 5 11:07:55 2020 +0100
libstdc++: Test C++11 implementation of std::chrono::__detail::ceil
Commit 53ad6b1979f4bd7121e977c4a44151b14d8a0147 split the implementation
of std::chrono::__detail::ceil so that when compiling for C++17 and
later std::chrono::ceil is used but when compiling for earlier versions
a separate implementation is used to comply with C++11's limited
constexpr rules. Let's run the equivalent of the existing
std::chrono::ceil test cases on std::chrono::__detail::ceil too to make
sure that it doesn't get broken.
libstdc++-v3/ChangeLog:
* testsuite/20_util/duration_cast/rounding_c++11.cc: Copy
rounding.cc and alter to support compilation for C++11 and to
test std::chrono::__detail::ceil.
Diff:
---
.../20_util/duration_cast/rounding_c++11.cc | 43 ++++++++++++++++++++++
1 file changed, 43 insertions(+)
diff --git a/libstdc++-v3/testsuite/20_util/duration_cast/rounding_c++11.cc b/libstdc++-v3/testsuite/20_util/duration_cast/rounding_c++11.cc
new file mode 100644
index 00000000000..f10d27fd082
--- /dev/null
+++ b/libstdc++-v3/testsuite/20_util/duration_cast/rounding_c++11.cc
@@ -0,0 +1,43 @@
+// Copyright (C) 2016-2020 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/>.
+
+// { dg-options "-std=gnu++11" }
+// { dg-do compile { target c++11 } }
+
+#include <chrono>
+
+using std::chrono::seconds;
+using std::chrono::milliseconds;
+
+using fp_seconds = std::chrono::duration<float>;
+
+static_assert( std::chrono::__detail::ceil<seconds>(milliseconds(1000))
+ == seconds(1) );
+static_assert( std::chrono::__detail::ceil<seconds>(milliseconds(1001))
+ == seconds(2) );
+static_assert( std::chrono::__detail::ceil<seconds>(milliseconds(1500))
+ == seconds(2) );
+static_assert( std::chrono::__detail::ceil<seconds>(milliseconds(1999))
+ == seconds(2) );
+static_assert( std::chrono::__detail::ceil<seconds>(milliseconds(2000))
+ == seconds(2) );
+static_assert( std::chrono::__detail::ceil<seconds>(milliseconds(2001))
+ == seconds(3) );
+static_assert( std::chrono::__detail::ceil<seconds>(milliseconds(2500))
+ == seconds(3) );
+static_assert( std::chrono::__detail::ceil<fp_seconds>(milliseconds(500))
+ == fp_seconds{0.5f} );
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