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