libstdc++-v3/testsuite/libstdc++-prettyprinters/cxx20.cc

   1 // { dg-options "-g -O0 -std=gnu++2a" }
   2 // { dg-do run { target c++2a } }
   3
   4 // Copyright (C) 2014-2021 Free Software Foundation, Inc.
   5 //
   6 // This file is part of the GNU ISO C++ Library.  This library is free
   7 // software; you can redistribute it and/or modify it under the
   8 // terms of the GNU General Public License as published by the
   9 // Free Software Foundation; either version 3, or (at your option)
  10 // any later version.
  11
  12 // This library is distributed in the hope that it will be useful,
  13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 // GNU General Public License for more details.
  16
  17 // You should have received a copy of the GNU General Public License along
  18 // with this library; see the file COPYING3.  If not see
  19 // <http://www.gnu.org/licenses/>.
  20
  21 #include <compare>
  22 #include <iostream>
  23
  24 struct X
  25 {
  26   int i;
  27
  28   std::weak_ordering operator<=>(X x) const noexcept { return i <=> x.i; }
  29 };
  30
  31 int
  32 main()
  33 {
  34   auto c1 = 1 <=> 1;
  35 // { dg-final { note-test c1 "std::strong_ordering::equal" } }
  36   auto c2 = 1 <=> 2;
  37 // { dg-final { note-test c2 "std::strong_ordering::less" } }
  38   auto c3 = 4 <=> 3;
  39 // { dg-final { note-test c3 "std::strong_ordering::greater" } }
  40
  41   auto c4 = X{1} <=> X{1};
  42 // { dg-final { note-test c4 "std::weak_ordering::equivalent" } }
  43   auto c5 = X{2} <=> X{3};
  44 // { dg-final { note-test c5 "std::weak_ordering::less" } }
  45   auto c6 = X{2} <=> X{1};
  46 // { dg-final { note-test c6 "std::weak_ordering::greater" } }
  47
  48   auto c7 = 0.2 <=> 0.2;
  49 // { dg-final { note-test c7 "std::partial_ordering::equivalent" } }
  50   auto c8 = 2.5 <=> 5.5;
  51 // { dg-final { note-test c8 "std::partial_ordering::less" } }
  52   auto c9 = 7.5 <=> -2.2;
  53 // { dg-final { note-test c9 "std::partial_ordering::greater" } }
  54   auto c10 = 0.0 <=> __builtin_nan("");
  55 // { dg-final { note-test c10 "std::partial_ordering::unordered" } }
  56
  57   std::cout << "\n";
  58   return 0;                     // Mark SPOT
  59 }
  60
  61 // { dg-final { gdb-test SPOT } }