43 lines
1.0 KiB
C++
43 lines
1.0 KiB
C++
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// Copyright David Abrahams 2003.
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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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#include <boost/implicit_cast.hpp>
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#include <boost/detail/lightweight_test.hpp>
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#include <boost/type.hpp>
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using boost::implicit_cast;
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using boost::type;
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template <class T>
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type<T> check_return(T) { return type<T>(); }
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struct foo
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{
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foo(char const*) {}
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operator long() const { return 0; }
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};
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typedef type<long> long_type;
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typedef type<foo> foo_type;
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int main()
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{
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type<long> x = check_return(boost::implicit_cast<long>(1));
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BOOST_TEST(boost::implicit_cast<long>(1) == 1L);
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type<foo> f = check_return(boost::implicit_cast<foo>("hello"));
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type<long> z = check_return(boost::implicit_cast<long>(foo("hello")));
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// warning suppression:
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(void)x;
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(void)f;
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(void)z;
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BOOST_CONSTEXPR long value = boost::implicit_cast<long>(42);
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BOOST_TEST(value == 42L);
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return boost::report_errors();
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}
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