Added boost header

test/external/boost/xpressive/detail/utility/literals.hpp

@@ -0,0 +1,85 @@
+///////////////////////////////////////////////////////////////////////////////
+// literals.hpp
+//
+//  Copyright 2008 Eric Niebler. Distributed under the Boost
+//  Software License, Version 1.0. (See accompanying file
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+#ifndef BOOST_XPRESSIVE_DETAIL_UTILITY_LITERALS_HPP_EAN_10_04_2005
+#define BOOST_XPRESSIVE_DETAIL_UTILITY_LITERALS_HPP_EAN_10_04_2005
+
+// MS compatible compilers support #pragma once
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+#include <boost/config.hpp> // for BOOST_STATIC_CONSTANT
+#include <boost/cstdint.hpp> // for BOOST_STATIC_CONSTANT
+#include <boost/detail/workaround.hpp>
+
+namespace boost { namespace xpressive { namespace detail
+{
+
+///////////////////////////////////////////////////////////////////////////////
+// char_literal
+//
+template<typename Char, boost::intmax_t Ch, boost::intmax_t Wch>
+struct char_literal;
+
+template<typename Char, boost::intmax_t Ch>
+struct char_literal<Char, Ch, Ch>
+{
+    BOOST_STATIC_CONSTANT(boost::intmax_t, value = Ch);
+};
+
+#ifndef BOOST_NO_INCLASS_MEMBER_INITIALIZATION
+template<typename Char, boost::intmax_t Ch>
+boost::intmax_t const char_literal<Char, Ch, Ch>::value;
+#endif
+
+template<typename Ch>
+struct string_literal;
+
+template<>
+struct string_literal<char>
+{
+    static char const *pick(char const *cstr, wchar_t const *)
+    {
+        return cstr;
+    }
+
+    static char pick(char ch, wchar_t)
+    {
+        return ch;
+    }
+};
+
+template<>
+struct string_literal<wchar_t>
+{
+    static wchar_t const *pick(char const *, wchar_t const *cstr)
+    {
+        return cstr;
+    }
+
+    static wchar_t pick(char, wchar_t ch)
+    {
+        return ch;
+    }
+};
+
+#if BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3206))
+
+# define BOOST_XPR_CHAR_(Char, ch) ch
+# define BOOST_XPR_CSTR_(Char, st) boost::xpressive::detail::string_literal<Char>::pick(st, L##st)
+
+#else
+
+# define BOOST_XPR_CHAR_(Char, ch) boost::xpressive::detail::char_literal<Char, ch, L##ch>::value
+# define BOOST_XPR_CSTR_(Char, st) boost::xpressive::detail::string_literal<Char>::pick(st, L##st)
+
+#endif
+
+}}} // namespace boost::xpressive::detail
+
+#endif