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/*
* Copyright (c) 2003-2009, John Wiegley. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of New Artisans LLC nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _ERROR_H
#define _ERROR_H
namespace ledger {
extern std::ostringstream _desc_buffer;
template <typename T>
inline void throw_func(const string& message) {
_desc_buffer.str("");
throw T(message);
}
#define throw_(cls, msg) \
((_desc_buffer << msg), throw_func<cls>(_desc_buffer.str()))
extern std::ostringstream _ctxt_buffer;
#define add_error_context(msg) \
((long(_ctxt_buffer.tellp()) == 0) ? \
(_ctxt_buffer << msg) : (_ctxt_buffer << std::endl << msg))
inline string error_context() {
string context = _ctxt_buffer.str();
_ctxt_buffer.str("");
return context;
}
inline string file_context(const path& file, std::size_t line) {
std::ostringstream buf;
buf << "\"" << file << "\", line " << line << ": ";
return buf.str();
}
inline string line_context(const string& line,
istream_pos_type pos = istream_pos_type(0),
istream_pos_type end_pos = istream_pos_type(0))
{
std::ostringstream buf;
buf << " " << line << "\n";
if (pos != istream_pos_type(0)) {
buf << " ";
if (end_pos == istream_pos_type(0)) {
for (istream_pos_type i = 0; i < pos; i += 1)
buf << " ";
buf << "^\n";
} else {
for (istream_pos_type i = 0; i < end_pos; i += 1) {
if (i >= pos)
buf << "^";
else
buf << " ";
}
buf << '\n';
}
}
return buf.str();
}
#define DECLARE_EXCEPTION(name, kind) \
class name : public kind { \
public: \
explicit name(const string& why) throw() : kind(why) {} \
virtual ~name() throw() {} \
}
} // namespace ledger
#endif // _ERROR_H
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