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- // Copyright 2017, 2019 Peter Dimov
- //
- // Distributed under the Boost Software License, Version 1.0.
- //
- // See accompanying file LICENSE_1_0.txt or copy at
- // http://www.boost.org/LICENSE_1_0.txt
- #include <boost/variant2/variant.hpp>
- using namespace boost::variant2;
- #if !defined(BOOST_MP11_HAS_CXX14_CONSTEXPR)
- #include <boost/config/pragma_message.hpp>
- BOOST_PRAGMA_MESSAGE("Skipping constexpr op<, op<= test because BOOST_MP11_HAS_CXX14_CONSTEXPR is not defined")
- int main() {}
- #else
- struct X
- {
- };
- inline constexpr bool operator<( X const&, X const& ) { return false; }
- inline constexpr bool operator>( X const&, X const& ) { return false; }
- inline constexpr bool operator<=( X const&, X const& ) { return false; }
- inline constexpr bool operator>=( X const&, X const& ) { return false; }
- #define STATIC_ASSERT(...) static_assert(__VA_ARGS__, #__VA_ARGS__)
- #define TEST_EQ( v1, v2 ) \
- STATIC_ASSERT( !(v1 < v2) ); \
- STATIC_ASSERT( !(v1 > v2) ); \
- STATIC_ASSERT( v1 <= v2 ); \
- STATIC_ASSERT( v1 >= v2 );
- #define TEST_LE( v1, v3 ) \
- STATIC_ASSERT( v1 < v3 ); \
- STATIC_ASSERT( v3 > v1 ); \
- STATIC_ASSERT( !(v1 > v3) ); \
- STATIC_ASSERT( !(v3 < v1) ); \
- STATIC_ASSERT( v1 <= v3 ); \
- STATIC_ASSERT( v3 >= v1 ); \
- STATIC_ASSERT( !(v1 >= v3) ); \
- STATIC_ASSERT( !(v3 <= v1) );
- int main()
- {
- {
- constexpr variant<int> v1, v2, v3( 1 ), v4( 1 );
- TEST_EQ( v1, v2 )
- TEST_LE( v1, v3 )
- TEST_EQ( v3, v4 )
- }
- {
- constexpr variant<int, float> v1, v2, v3( 1 ), v4( 1 ), v5( 3.14f ), v6( 3.14f );
- TEST_EQ( v1, v2 )
- TEST_LE( v1, v3 )
- TEST_EQ( v3, v4 )
- TEST_LE( v1, v5 )
- TEST_LE( v3, v5 )
- TEST_EQ( v5, v6 )
- }
- {
- 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 );
- TEST_EQ( v1, v2 )
- TEST_LE( v1, v3 )
- TEST_EQ( v3, v4 )
- TEST_LE( v1, v5 )
- TEST_LE( v3, v5 )
- TEST_EQ( v5, v6 )
- }
- {
- constexpr variant<X> v1, v2;
- STATIC_ASSERT( !(v1 < v2) );
- STATIC_ASSERT( !(v1 > v2) );
- STATIC_ASSERT( !(v1 <= v2) );
- STATIC_ASSERT( !(v1 >= v2) );
- }
- }
- #endif
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