1 files changed, 60 insertions, 0 deletions
diff --git a/libstdc++-v3/testsuite/20_util/ratio/comparisons/comp2.cc b/libstdc++-v3/testsuite/20_util/ratio/comparisons/comp2.cc
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index 000000000..20da30cbe
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+++ b/libstdc++-v3/testsuite/20_util/ratio/comparisons/comp2.cc
@@ -0,0 +1,60 @@
+// { dg-options "-std=gnu++0x" }
+// { dg-require-cstdint "" }
+
+// Copyright (C) 2008, 2009, 2010, 2011 Free Software Foundation
+//
+// 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 <ratio>
+#include <testsuite_hooks.h>
+
+static const std::intmax_t M = INTMAX_MAX;
+
+void
+test01()
+{
+  bool test __attribute__((unused)) = true;
+ 
+  // No overflow with same denominator
+  VERIFY( (std::ratio_less<std::ratio<M - 2, M>,
+           std::ratio<M - 1, M>>::value == 1) );
+  
+  VERIFY( (std::ratio_less<std::ratio<M - 1, M>,
+           std::ratio<M - 2, M>>::value == 0) );
+     
+  // No overflow if signs differ
+  VERIFY( (std::ratio_less<std::ratio<-M, M - 1>,
+           std::ratio<M - 1, M - 2>>::value == 1) );
+  
+  VERIFY( (std::ratio_less<std::ratio<M - 1, M - 2>,
+           std::ratio<-M, M - 1>>::value == 0) );
+
+  // No overflow
+  VERIFY( (std::ratio_less<std::ratio<M, M - 1>,
+           std::ratio<M, M - 2>>::value == 1) );
+
+  VERIFY( (std::ratio_less<std::ratio<-M, M - 1>,
+           std::ratio<-M, M - 2>>::value == 0) );
+
+  VERIFY( (std::ratio_less<std::ratio<M - 2, M - 1>,
+           std::ratio<M - 1, M>>::value == 1) );
+}
+
+int main()
+{
+  test01();
+  return 0;
+}