ceph/src/boost/libs/variant2/test/variant_lt_gt_cx.cpp

   1
   2 // Copyright 2017, 2019 Peter Dimov
   3 //
   4 // Distributed under the Boost Software License, Version 1.0.
   5 //
   6 // See accompanying file LICENSE_1_0.txt or copy at
   7 // http://www.boost.org/LICENSE_1_0.txt
   8
   9 #include <boost/variant2/variant.hpp>
  10 using namespace boost::variant2;
  11
  12 #if !defined(BOOST_MP11_HAS_CXX14_CONSTEXPR)
  13
  14 #include <boost/config/pragma_message.hpp>
  15
  16 BOOST_PRAGMA_MESSAGE("Skipping constexpr op<, op<= test because BOOST_MP11_HAS_CXX14_CONSTEXPR is not defined")
  17
  18 int main() {}
  19
  20 #else
  21
  22 struct X
  23 {
  24 };
  25
  26 inline constexpr bool operator<( X const&, X const& ) { return false; }
  27 inline constexpr bool operator>( X const&, X const& ) { return false; }
  28 inline constexpr bool operator<=( X const&, X const& ) { return false; }
  29 inline constexpr bool operator>=( X const&, X const& ) { return false; }
  30
  31 #define STATIC_ASSERT(...) static_assert(__VA_ARGS__, #__VA_ARGS__)
  32
  33 #define TEST_EQ( v1, v2 ) \
  34     STATIC_ASSERT( !(v1 < v2) ); \
  35     STATIC_ASSERT( !(v1 > v2) ); \
  36     STATIC_ASSERT( v1 <= v2 ); \
  37     STATIC_ASSERT( v1 >= v2 );
  38
  39 #define TEST_LE( v1, v3 ) \
  40     STATIC_ASSERT( v1 < v3 ); \
  41     STATIC_ASSERT( v3 > v1 ); \
  42     STATIC_ASSERT( !(v1 > v3) ); \
  43     STATIC_ASSERT( !(v3 < v1) ); \
  44     STATIC_ASSERT( v1 <= v3 ); \
  45     STATIC_ASSERT( v3 >= v1 ); \
  46     STATIC_ASSERT( !(v1 >= v3) ); \
  47     STATIC_ASSERT( !(v3 <= v1) );
  48
  49 int main()
  50 {
  51     {
  52         constexpr variant<int> v1, v2, v3( 1 ), v4( 1 );
  53
  54         TEST_EQ( v1, v2 )
  55         TEST_LE( v1, v3 )
  56         TEST_EQ( v3, v4 )
  57     }
  58
  59     {
  60         constexpr variant<int, float> v1, v2, v3( 1 ), v4( 1 ), v5( 3.14f ), v6( 3.14f );
  61
  62         TEST_EQ( v1, v2 )
  63         TEST_LE( v1, v3 )
  64         TEST_EQ( v3, v4 )
  65         TEST_LE( v1, v5 )
  66         TEST_LE( v3, v5 )
  67         TEST_EQ( v5, v6 )
  68     }
  69
  70     {
  71         constexpr variant<int, int, float> v1, v2, v3( in_place_index_t<1>{} ), v4( in_place_index_t<1>{} ), v5( 3.14f ), v6( 3.14f );
  72
  73         TEST_EQ( v1, v2 )
  74         TEST_LE( v1, v3 )
  75         TEST_EQ( v3, v4 )
  76         TEST_LE( v1, v5 )
  77         TEST_LE( v3, v5 )
  78         TEST_EQ( v5, v6 )
  79     }
  80
  81     {
  82         constexpr variant<X> v1, v2;
  83
  84         STATIC_ASSERT( !(v1 < v2) );
  85         STATIC_ASSERT( !(v1 > v2) );
  86         STATIC_ASSERT( !(v1 <= v2) );
  87         STATIC_ASSERT( !(v1 >= v2) );
  88     }
  89 }
  90
  91 #endif