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/* The copyright in this software is being made available under the BSD
* License, included below. This software may be subject to other third party
* and contributor rights, including patent rights, and no such rights are
* granted under this license.
*
* Copyright (c) 2010-2022, ITU/ISO/IEC
* 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 the ITU/ISO/IEC 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 HOLDER 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 __RUNTIMEERROR__
#define __RUNTIMEERROR__
#include <sstream>
#include <stdexcept>
/// This class serves the same purpose as std::runtime_error, but it can be more convenient to use
class RuntimeError: public std::runtime_error
{
public:
RuntimeError( ): std::runtime_error( "" ), m_firstWhat( true ) { }
virtual ~RuntimeError( ) throw ( ) { }
/// Implementation of the std::exception::what method
const char * what( ) const throw( )
{
if( m_firstWhat )
{
std::ostringstream o;
outputWhat( o );
m_what = o.str( );
m_firstWhat = false;
}
return m_what.c_str( );
}
protected:
/// The implementing class implements this method to customize the what output
/// \param o The what stream is outputted to this parameter
virtual void outputWhat( std::ostream & o ) const =0;
private:
mutable bool m_firstWhat; ///< True i.f.f. the what method has not yet been called
mutable std::string m_what; ///< Contains the what string. Populated by the first call to the what method.
};
/// Convenient formatted output operator that just outputs the what string
inline std::ostream& operator<<( std::ostream& left, const RuntimeError& right )
{
return left << right.what( );
}
#endif
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