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69 lines
1.6 KiB
C++
69 lines
1.6 KiB
C++
#ifndef BOOST_MATH_S__HPP
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#define BOOST_MATH_S__HPP
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// Copyright (c) 2006 Johan Rade
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// Copyright (c) 2012 Paul A. Bristow
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE_1_0.txt
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// or copy at http://www.boost.org/LICENSE_1_0.txt)
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// The macro S_ lets you write
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//
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// basic_string<CharType> s = S_("foo");
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// and
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// CharType c = S_('a');
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//
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// provided that CharType is either char or wchar_t.
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// Used by tests of output of signed zero and others.
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#ifdef _MSC_VER
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# pragma warning(push)
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# pragma warning(disable : 4512) // conditional expression is constant.
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#endif
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#include <string>
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//------------------------------------------------------------------------------
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#define S_(a) make_literal_helper(a, L##a)
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class char_literal_helper {
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public:
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char_literal_helper(char c, wchar_t wc) : c_(c), wc_(wc) {}
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operator char() { return c_; }
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operator wchar_t() { return wc_; }
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private:
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const char c_;
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const wchar_t wc_;
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};
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class string_literal_helper {
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public:
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string_literal_helper(const char* s, const wchar_t* ws) : s_(s), ws_(ws) {}
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operator std::string() { return s_; }
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operator std::wstring() { return ws_; }
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private:
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const char* s_;
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const wchar_t* ws_;
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};
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inline char_literal_helper make_literal_helper(char c, wchar_t wc)
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{
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return char_literal_helper(c, wc);
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}
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inline string_literal_helper make_literal_helper(const char* s, const wchar_t* ws)
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{
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return string_literal_helper(s, ws);
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}
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//------------------------------------------------------------------------------
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#ifdef _MSC_VER
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# pragma warning(pop)
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#endif
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#endif // BOOST_MATH_S__HPP
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