123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175 |
- // Copyright 2017 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>
- #include <boost/core/lightweight_test.hpp>
- #include <boost/core/lightweight_test_trait.hpp>
- #include <type_traits>
- #include <utility>
- #include <string>
- using namespace boost::variant2;
- #define STATIC_ASSERT(...) static_assert(__VA_ARGS__, #__VA_ARGS__)
- struct X1
- {
- int v;
- X1(): v(0) {}
- explicit X1(int v): v(v) {}
- X1(X1 const& r): v(r.v) {}
- X1(X1&& r): v(r.v) {}
- X1& operator=( X1 const& r ) { v = r.v; return *this; }
- X1& operator=( X1&& r ) { v = r.v; return *this; }
- };
- inline bool operator==( X1 const& a, X1 const& b ) { return a.v == b.v; }
- STATIC_ASSERT( !std::is_nothrow_default_constructible<X1>::value );
- STATIC_ASSERT( !std::is_nothrow_copy_constructible<X1>::value );
- STATIC_ASSERT( !std::is_nothrow_move_constructible<X1>::value );
- STATIC_ASSERT( !std::is_nothrow_copy_assignable<X1>::value );
- STATIC_ASSERT( !std::is_nothrow_move_assignable<X1>::value );
- struct X2
- {
- int v;
- X2(): v(0) {}
- explicit X2(int v): v(v) {}
- X2(X2 const& r): v(r.v) {}
- X2(X2&& r): v(r.v) {}
- X2& operator=( X2 const& r ) { v = r.v; return *this; }
- X2& operator=( X2&& r ) { v = r.v; return *this; }
- };
- inline bool operator==( X2 const& a, X2 const& b ) { return a.v == b.v; }
- STATIC_ASSERT( !std::is_nothrow_default_constructible<X2>::value );
- STATIC_ASSERT( !std::is_nothrow_copy_constructible<X2>::value );
- STATIC_ASSERT( !std::is_nothrow_move_constructible<X2>::value );
- STATIC_ASSERT( !std::is_nothrow_copy_assignable<X2>::value );
- STATIC_ASSERT( !std::is_nothrow_move_assignable<X2>::value );
- int main()
- {
- {
- variant<int> v( 1 );
- variant<int, float> v2( v );
- BOOST_TEST( holds_alternative<int>( v2 ) );
- BOOST_TEST_EQ( get<int>( v ), get<int>( v2 ) );
- variant<int, float> v3( std::move(v) );
- BOOST_TEST( holds_alternative<int>( v3 ) );
- BOOST_TEST_EQ( get<int>( v2 ), get<int>( v3 ) );
- }
- {
- variant<int> const v( 1 );
- variant<int, float> v2( v );
- BOOST_TEST( holds_alternative<int>( v2 ) );
- BOOST_TEST_EQ( get<int>( v ), get<int>( v2 ) );
- variant<int, float> v3( std::move(v) );
- BOOST_TEST( holds_alternative<int>( v3 ) );
- BOOST_TEST_EQ( get<int>( v2 ), get<int>( v3 ) );
- }
- {
- variant<int const> v( 1 );
- variant<int const, float> v2( v );
- BOOST_TEST( holds_alternative<int const>( v2 ) );
- BOOST_TEST_EQ( get<int const>( v ), get<int const>( v2 ) );
- variant<int const, float> v3( std::move(v) );
- BOOST_TEST( holds_alternative<int const>( v3 ) );
- BOOST_TEST_EQ( get<int const>( v2 ), get<int const>( v3 ) );
- }
- {
- variant<int const> const v( 1 );
- variant<int const, float> v2( v );
- BOOST_TEST( holds_alternative<int const>( v2 ) );
- BOOST_TEST_EQ( get<int const>( v ), get<int const>( v2 ) );
- variant<int const, float> v3( std::move(v) );
- BOOST_TEST( holds_alternative<int const>( v3 ) );
- BOOST_TEST_EQ( get<int const>( v2 ), get<int const>( v3 ) );
- }
- {
- variant<float> v( 3.14f );
- variant<int, float> v2( v );
- BOOST_TEST( holds_alternative<float>( v2 ) );
- BOOST_TEST_EQ( get<float>( v ), get<float>( v2 ) );
- variant<int, float> v3( std::move(v) );
- BOOST_TEST( holds_alternative<float>( v3 ) );
- BOOST_TEST_EQ( get<float>( v2 ), get<float>( v3 ) );
- }
- {
- variant<float> v( 3.15f );
- variant<int, int, float> v2( v );
- BOOST_TEST( holds_alternative<float>( v2 ) );
- BOOST_TEST_EQ( get<float>( v ), get<float>( v2 ) );
- variant<int, int, float> v3( std::move(v) );
- BOOST_TEST( holds_alternative<float>( v3 ) );
- BOOST_TEST_EQ( get<float>( v2 ), get<float>( v3 ) );
- }
- {
- variant<float, std::string> v( "s1" );
- variant<int, int, float, std::string> v2( v );
- BOOST_TEST( holds_alternative<std::string>( v2 ) );
- BOOST_TEST_EQ( get<std::string>( v ), get<std::string>( v2 ) );
- variant<int, int, float, std::string> v3( std::move(v) );
- BOOST_TEST( holds_alternative<std::string>( v3 ) );
- BOOST_TEST_EQ( get<std::string>( v2 ), get<std::string>( v3 ) );
- }
- {
- variant<X1, X2> v{ X1{1} };
- variant<int, int, float, float, X1, X2> v2( v );
- BOOST_TEST( holds_alternative<X1>( v2 ) );
- BOOST_TEST_EQ( get<X1>( v ).v, get<X1>( v2 ).v );
- variant<int, int, float, float, X1, X2> v3( std::move(v) );
- BOOST_TEST( holds_alternative<X1>( v3 ) );
- BOOST_TEST_EQ( get<X1>( v2 ).v, get<X1>( v3 ).v );
- }
- return boost::report_errors();
- }
|