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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; }
- #define STATIC_ASSERT(...) static_assert(__VA_ARGS__, #__VA_ARGS__)
- int main()
- {
- {
- constexpr variant<int> v1, v2, v3( 1 ), v4( 1 );
- STATIC_ASSERT( v1 == v2 );
- STATIC_ASSERT( !(v1 != v2) );
- STATIC_ASSERT( v1 != v3 );
- STATIC_ASSERT( !(v1 == v3) );
- STATIC_ASSERT( v3 == v4 );
- STATIC_ASSERT( !(v3 != v4) );
- }
- {
- constexpr variant<int, float> v1, v2, v3( 1 ), v4( 1 ), v5( 3.14f ), v6( 3.14f );
- STATIC_ASSERT( v1 == v2 );
- STATIC_ASSERT( !(v1 != v2) );
- STATIC_ASSERT( v1 != v3 );
- STATIC_ASSERT( !(v1 == v3) );
- STATIC_ASSERT( v3 == v4 );
- STATIC_ASSERT( !(v3 != v4) );
- STATIC_ASSERT( v1 != v5 );
- STATIC_ASSERT( !(v1 == v5) );
- STATIC_ASSERT( v3 != v5 );
- STATIC_ASSERT( !(v3 == v5) );
- STATIC_ASSERT( v5 == v6 );
- STATIC_ASSERT( !(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 );
- STATIC_ASSERT( v1 == v2 );
- STATIC_ASSERT( !(v1 != v2) );
- STATIC_ASSERT( v1 != v3 );
- STATIC_ASSERT( !(v1 == v3) );
- STATIC_ASSERT( v3 == v4 );
- STATIC_ASSERT( !(v3 != v4) );
- STATIC_ASSERT( v1 != v5 );
- STATIC_ASSERT( !(v1 == v5) );
- STATIC_ASSERT( v3 != v5 );
- STATIC_ASSERT( !(v3 == v5) );
- STATIC_ASSERT( v5 == v6 );
- STATIC_ASSERT( !(v5 != v6) );
- }
- {
- constexpr variant<X> v1, v2;
- STATIC_ASSERT( !(v1 == v2) );
- STATIC_ASSERT( !(v1 != v2) );
- }
- }
- #endif
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