64 lines
1.8 KiB
C++
64 lines
1.8 KiB
C++
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// Copyright (c) 2017
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// Mikhail Maximov
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//
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// Distributed under the Boost Software License, Version 1.0. (See
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// 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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// The test is base on https://svn.boost.org/trac/boost/ticket/8554
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// variant was not able to extract types from mpl::joint_view
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#include <string>
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#include "boost/config.hpp"
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#include "boost/test/minimal.hpp"
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#include "boost/variant.hpp"
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#include "boost/mpl/joint_view.hpp"
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#include "boost/mpl/insert_range.hpp"
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#include "boost/mpl/set.hpp"
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template<class T, class Variant>
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void check_exception_on_get(Variant& v) {
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try {
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boost::get<T>(v);
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BOOST_FAIL("Expected exception boost::bad_get, but got nothing.");
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} catch (boost::bad_get&) { //okay it is expected behaviour
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} catch (...) { BOOST_FAIL("Expected exception boost::bad_get, but got something else."); }
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}
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void test_joint_view() {
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typedef boost::variant<int> v1;
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typedef boost::variant<std::string> v2;
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typedef boost::make_variant_over<boost::mpl::joint_view<v1::types, v2::types>::type>::type v3;
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v1 a = 1;
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v2 b = "2";
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v3 c = a;
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BOOST_CHECK(boost::get<int>(c) == 1);
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BOOST_CHECK(c.which() == 0);
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v3 d = b;
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BOOST_CHECK(boost::get<std::string>(d) == "2");
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BOOST_CHECK(d.which() == 1);
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check_exception_on_get<std::string>(c);
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check_exception_on_get<int>(d);
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}
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void test_set() {
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typedef boost::mpl::set2< std::string, int > types;
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typedef boost::make_variant_over< types >::type v;
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v a = 1;
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BOOST_CHECK(boost::get<int>(a) == 1);
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check_exception_on_get<std::string>(a);
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a = "2";
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BOOST_CHECK(boost::get<std::string>(a) == "2");
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check_exception_on_get<int>(a);
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}
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int test_main(int , char* [])
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{
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test_joint_view();
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test_set();
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return 0;
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}
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