| 1 | /* |
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| 2 | * Copyright Andrey Semashev 2007 - 2013. |
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| 3 | * Distributed under the Boost Software License, Version 1.0. |
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| 4 | * (See accompanying file LICENSE_1_0.txt or copy at |
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| 5 | * http://www.boost.org/LICENSE_1_0.txt) |
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| 6 | */ |
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| 7 | /*! |
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| 8 | * \file explicit_operator_bool.cpp |
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| 9 | * \author Andrey Semashev |
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| 10 | * \date 17.07.2010 |
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| 11 | * |
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| 12 | * \brief This test checks that explicit operator bool can be used in |
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| 13 | * the valid contexts. |
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| 14 | */ |
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| 15 | |
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| 16 | #define BOOST_TEST_MODULE explicit_operator_bool |
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| 17 | |
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| 18 | #include <boost/utility/explicit_operator_bool.hpp> |
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| 19 | |
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| 20 | namespace { |
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| 21 | |
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| 22 | // A test object that has the operator of explicit conversion to bool |
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| 23 | struct checkable1 |
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| 24 | { |
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| 25 | BOOST_EXPLICIT_OPERATOR_BOOL() |
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| 26 | bool operator! () const |
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| 27 | { |
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| 28 | return false; |
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| 29 | } |
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| 30 | }; |
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| 31 | |
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| 32 | struct checkable2 |
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| 33 | { |
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| 34 | BOOST_CONSTEXPR_EXPLICIT_OPERATOR_BOOL() |
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| 35 | BOOST_CONSTEXPR bool operator! () const |
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| 36 | { |
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| 37 | return false; |
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| 38 | } |
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| 39 | }; |
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| 40 | |
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| 41 | } // namespace |
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| 42 | |
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| 43 | int main(int, char*[]) |
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| 44 | { |
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| 45 | checkable1 val1; |
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| 46 | if (val1) |
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| 47 | { |
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| 48 | checkable2 val2; |
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| 49 | if (val2) |
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| 50 | return 0; |
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| 51 | } |
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| 52 | |
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| 53 | return 1; |
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| 54 | } |
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| 55 | |
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