66c5cd4427
This makes it possible to internationalize strings while still using
I/O streams. For example:
std::cout << ACCUM(_("Hello to %1 and %2!") << "me" << "you")
<< std::endl;
100 lines
2.4 KiB
C++
100 lines
2.4 KiB
C++
/*
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* Copyright (c) 2003-2009, John Wiegley. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* - Neither the name of New Artisans LLC nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* @addtogroup util
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*/
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/**
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* @file accum.h
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* @author John Wiegley
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*
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* @ingroup util
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*
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* @brief Brief
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*
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* Full.
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*/
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#ifndef _ACCUM_H
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#define _ACCUM_H
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namespace ledger {
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/**
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* @brief Brief
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*
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* Full.
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*/
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class straccbuf : public std::streambuf
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{
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protected:
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std::string str; // accumulator
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std::size_t index;
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public:
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straccbuf() : index(0) {}
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protected:
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virtual std::streamsize xsputn(const char * s, std::streamsize num);
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friend class straccstream;
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};
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/**
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* @brief Brief
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*
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* Full.
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*/
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class straccstream : public std::ostream
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{
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protected:
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straccbuf buf;
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public:
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straccstream() : std::ostream(0) {
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rdbuf(&buf);
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}
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void clear() {
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buf.str.clear();
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buf.index = 0;
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}
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std::string str() const {
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return buf.str;
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}
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};
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#define ACCUM(obj) (static_cast<straccstream&>(obj).str())
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} // namespace ledger
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#endif // _ACCUM_H
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