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Add test/variant_value_construct(_cx)

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Peter Dimov
2017-05-30 16:05:55 +03:00
parent 5aa16c5bf7
commit a99b5f8e2e
3 changed files with 235 additions and 0 deletions
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124
test/variant_value_construct.cpp Normal file
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// 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;
struct X
{
operator int() const { return 2; }
};
int main()
{
{
variant<int> v( 1 );
BOOST_TEST_EQ( v.index(), 0 );
BOOST_TEST_EQ( get<0>(v), 1 );
}
{
variant<int> v( 'a' );
BOOST_TEST_EQ( v.index(), 0 );
BOOST_TEST_EQ( get<0>(v), 'a' );
}
{
variant<int> v( X{} );
BOOST_TEST_EQ( v.index(), 0 );
BOOST_TEST_EQ( get<0>(v), 2 );
}
{
variant<int const> v( 1 );
BOOST_TEST_EQ( v.index(), 0 );
BOOST_TEST_EQ( get<0>(v), 1 );
}
{
variant<int const> v( 'a' );
BOOST_TEST_EQ( v.index(), 0 );
BOOST_TEST_EQ( get<0>(v), 'a' );
}
{
variant<int const> v( X{} );
BOOST_TEST_EQ( v.index(), 0 );
BOOST_TEST_EQ( get<0>(v), 2 );
}
{
variant<int, float, std::string> v( 1 );
BOOST_TEST_EQ( v.index(), 0 );
BOOST_TEST( holds_alternative<int>(v) );
BOOST_TEST_EQ( get<0>(v), 1 );
}
{
variant<int, float, std::string> v( 'a' );
BOOST_TEST_EQ( v.index(), 0 );
BOOST_TEST( holds_alternative<int>(v) );
BOOST_TEST_EQ( get<0>(v), 'a' );
}
{
variant<int, float, std::string> v( X{} );
BOOST_TEST_EQ( v.index(), 0 );
BOOST_TEST( holds_alternative<int>(v) );
BOOST_TEST_EQ( get<0>(v), 2 );
}
{
variant<int, float, std::string> v( 3.14f );
BOOST_TEST_EQ( v.index(), 1 );
BOOST_TEST( holds_alternative<float>(v) );
BOOST_TEST_EQ( get<1>(v), 3.14f );
}
{
variant<int, float, std::string> v( "text" );
BOOST_TEST_EQ( v.index(), 2 );
BOOST_TEST( holds_alternative<std::string>(v) );
BOOST_TEST_EQ( get<2>(v), std::string("text") );
}
{
variant<int, int, float, std::string> v( 3.14f );
BOOST_TEST_EQ( v.index(), 2 );
BOOST_TEST( holds_alternative<float>(v) );
BOOST_TEST_EQ( get<2>(v), 3.14f );
}
{
variant<int, int, float, std::string> v( "text" );
BOOST_TEST_EQ( v.index(), 3 );
BOOST_TEST( holds_alternative<std::string>(v) );
BOOST_TEST_EQ( get<3>(v), std::string("text") );
}
return boost::report_errors();
}