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Add tests for holds_alternative

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This commit is contained in:
Peter Dimov
2017-05-29 20:07:42 +03:00
parent 6f0a3029f4
commit 99747c7807
5 changed files with 123 additions and 2 deletions
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2
test/Jamfile
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@ -13,3 +13,5 @@ REQ = ; #[ requires cxx11_variadic_templates cxx11_template_aliases cxx11_declty
run variant_size.cpp : : : $(REQ) ;
run variant_alternative.cpp : : : $(REQ) ;
run holds_alternative.cpp : : : $(REQ) ;
run holds_alternative_cx.cpp : : : $(REQ) ;

78
test/holds_alternative.cpp Normal file
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@ -0,0 +1,78 @@
// 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 <string>
using namespace boost::variant2;
int main()
{
{
variant<int> v;
BOOST_TEST( holds_alternative<int>( v ) );
}
{
variant<int, float> v;
BOOST_TEST( holds_alternative<int>( v ) );
BOOST_TEST( !holds_alternative<float>( v ) );
}
{
variant<int, float> v( 3.14f );
BOOST_TEST( !holds_alternative<int>( v ) );
BOOST_TEST( holds_alternative<float>( v ) );
}
{
variant<int, float, float> v;
BOOST_TEST( holds_alternative<int>( v ) );
}
{
variant<int, int, float> v( 3.14f );
BOOST_TEST( holds_alternative<float>( v ) );
}
{
variant<int, float, std::string> v;
BOOST_TEST( holds_alternative<int>( v ) );
BOOST_TEST( !holds_alternative<float>( v ) );
BOOST_TEST( !holds_alternative<std::string>( v ) );
}
{
variant<int, float, std::string> v( 3.14f );
BOOST_TEST( !holds_alternative<int>( v ) );
BOOST_TEST( holds_alternative<float>( v ) );
BOOST_TEST( !holds_alternative<std::string>( v ) );
}
{
variant<int, float, std::string> v( "text" );
BOOST_TEST( !holds_alternative<int>( v ) );
BOOST_TEST( !holds_alternative<float>( v ) );
BOOST_TEST( holds_alternative<std::string>( v ) );
}
{
variant<int, int, float, std::string> v( 3.14f );
BOOST_TEST( holds_alternative<float>( v ) );
BOOST_TEST( !holds_alternative<std::string>( v ) );
}
{
variant<int, int, float, std::string> v( "text" );
BOOST_TEST( !holds_alternative<float>( v ) );
BOOST_TEST( holds_alternative<std::string>( v ) );
}
return boost::report_errors();
}

43
test/holds_alternative_cx.cpp Normal file
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@ -0,0 +1,43 @@
// 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>
using namespace boost::variant2;
#define STATIC_ASSERT(...) static_assert(__VA_ARGS__, #__VA_ARGS__)
int main()
{
{
constexpr variant<int> v;
STATIC_ASSERT( holds_alternative<int>( v ) );
}
{
constexpr variant<int, float> v;
STATIC_ASSERT( holds_alternative<int>( v ) );
STATIC_ASSERT( !holds_alternative<float>( v ) );
}
{
constexpr variant<int, float> v( 3.14f );
STATIC_ASSERT( !holds_alternative<int>( v ) );
STATIC_ASSERT( holds_alternative<float>( v ) );
}
{
constexpr variant<int, float, float> v;
STATIC_ASSERT( holds_alternative<int>( v ) );
}
{
constexpr variant<int, int, float> v( 3.14f );
STATIC_ASSERT( holds_alternative<float>( v ) );
}
}

1
test/variant_alternative.cpp
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@ -20,7 +20,6 @@ template<class I, class T> using var_alt_t = variant_alternative_t<I::value, T>;
int main()
{
BOOST_TEST_TRAIT_TRUE((std::is_same<variant_alternative_t<0, variant<void>>, void>));
BOOST_TEST_TRAIT_TRUE((std::is_same<variant_alternative_t<0, variant<void> const>, void const>));
BOOST_TEST_TRAIT_TRUE((std::is_same<variant_alternative_t<0, variant<void> volatile>, void volatile>));

1
test/variant_size.cpp
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@ -20,7 +20,6 @@ template<class T> using var_size_t = mp_size_t<variant_size<T>::value>;
int main()
{
BOOST_TEST_EQ( (variant_size<variant<>>::value), 0 );
BOOST_TEST_EQ( (variant_size<variant<> const>::value), 0 );
BOOST_TEST_EQ( (variant_size<variant<> volatile>::value), 0 );