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I often have the problem that when I change a std::wstring to boost::optional<std::wstring> and the variable is used as a parameter with Boost.Format, the result silently changes from the string contents to "1". This change prevents implicit conversion to bool if the compiler supports explicit conversion operators.
29 lines
693 B
C++
29 lines
693 B
C++
// Copyright (C) 2014, Andrzej Krzemienski.
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//
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// Use, modification, and distribution is subject to the Boost Software
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// License, Version 1.0. (See 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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//
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// See http://www.boost.org/lib/optional for documentation.
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//
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// You are welcome to contact the author at:
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// akrzemi1@gmail.com
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//
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#include "boost/optional.hpp"
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//
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// THIS TEST SHOULD FAIL TO COMPILE
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//
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#if !defined(BOOST_NO_CXX11_EXPLICIT_CONVERSION_OPERATORS)
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bool test_implicit_conversion_to_bool()
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{
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boost::optional<int> opt;
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return opt;
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}
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#else
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# error "Test skipped: this compiler does not support explicit conversion operators."
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#endif
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