stringize.h
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- /**
- * @file stringize.h
- * @author Nat Goodspeed
- * @date 2008-12-17
- * @brief stringize(item) template function and STRINGIZE(expression) macro
- *
- * $LicenseInfo:firstyear=2008&license=viewergpl$
- *
- * Copyright (c) 2008-2010, Linden Research, Inc.
- *
- * Second Life Viewer Source Code
- * The source code in this file ("Source Code") is provided by Linden Lab
- * to you under the terms of the GNU General Public License, version 2.0
- * ("GPL"), unless you have obtained a separate licensing agreement
- * ("Other License"), formally executed by you and Linden Lab. Terms of
- * the GPL can be found in doc/GPL-license.txt in this distribution, or
- * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
- *
- * There are special exceptions to the terms and conditions of the GPL as
- * it is applied to this Source Code. View the full text of the exception
- * in the file doc/FLOSS-exception.txt in this software distribution, or
- * online at
- * http://secondlifegrid.net/programs/open_source/licensing/flossexception
- *
- * By copying, modifying or distributing this software, you acknowledge
- * that you have read and understood your obligations described above,
- * and agree to abide by those obligations.
- *
- * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
- * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
- * COMPLETENESS OR PERFORMANCE.
- * $/LicenseInfo$
- */
- #if ! defined(LL_STRINGIZE_H)
- #define LL_STRINGIZE_H
- #include <sstream>
- #include <boost/lambda/lambda.hpp>
- /**
- * stringize(item) encapsulates an idiom we use constantly, using
- * operator<<(std::ostringstream&, TYPE) followed by std::ostringstream::str()
- * to render a string expressing some item.
- */
- template <typename T>
- std::string stringize(const T& item)
- {
- std::ostringstream out;
- out << item;
- return out.str();
- }
- /**
- * stringize_f(functor)
- */
- template <typename Functor>
- std::string stringize_f(Functor const & f)
- {
- std::ostringstream out;
- f(out);
- return out.str();
- }
- /**
- * STRINGIZE(item1 << item2 << item3 ...) effectively expands to the
- * following:
- * @code
- * std::ostringstream out;
- * out << item1 << item2 << item3 ... ;
- * return out.str();
- * @endcode
- */
- #define STRINGIZE(EXPRESSION) (stringize_f(boost::lambda::_1 << EXPRESSION))
- /**
- * destringize(str)
- * defined for symmetry with stringize
- * *NOTE - this has distinct behavior from boost::lexical_cast<T> regarding
- * leading/trailing whitespace and handling of bad_lexical_cast exceptions
- */
- template <typename T>
- T destringize(std::string const & str)
- {
- T val;
- std::istringstream in(str);
- in >> val;
- return val;
- }
- /**
- * destringize_f(str, functor)
- */
- template <typename Functor>
- void destringize_f(std::string const & str, Functor const & f)
- {
- std::istringstream in(str);
- f(in);
- }
- /**
- * DESTRINGIZE(str, item1 >> item2 >> item3 ...) effectively expands to the
- * following:
- * @code
- * std::istringstream in(str);
- * in >> item1 >> item2 >> item3 ... ;
- * @endcode
- */
- #define DESTRINGIZE(STR, EXPRESSION) (destringize_f((STR), (boost::lambda::_1 >> EXPRESSION)))
- #endif /* ! defined(LL_STRINGIZE_H) */