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/*
Please use git log for copyright holder and year information
This file is part of libbash.
libbash is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.
libbash is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with libbash. If not, see <http://www.gnu.org/licenses/>.
*/
///
/// \file builtin_exceptions.h
/// \brief implementations for builtin exceptions
///
#ifndef LIBBASH_BUILTINS_BUILTIN_EXCEPTIONS_H_
#define LIBBASH_BUILTINS_BUILTIN_EXCEPTIONS_H_
#include <stdexcept>
#include "exceptions.h"
///
/// \class return_exception
/// \brief thrown when executing the return builtin
///
class return_exception: public std::runtime_error
{
public:
explicit return_exception():
runtime_error("return exception"){}
};
///
/// \class loop_control_exception
/// \brief base class used by break and continue
///
class loop_control_exception
{
int count;
virtual void rethrow() = 0;
protected:
virtual ~loop_control_exception() {}
public:
/// \brief the construtor
/// \param c the nested block counter
explicit loop_control_exception(int c): count(c) {}
/// \brief rethrow the exception if the counter is greater than 1
void rethrow_unless_correct_frame()
{
if(count != 1)
{
--count;
rethrow();
}
}
};
///
/// \class continue_exception
/// \brief thrown when executing the continue builtin
///
class continue_exception: public loop_control_exception
{
protected:
/// \brief rethrow the exception itself
virtual void rethrow()
{
throw *this;
}
public:
/// \brief the constructor of the exception
/// \param c the nested block counter
explicit continue_exception(int c): loop_control_exception(c) {
if(c < 1)
throw libbash::illegal_argument_exception("continue: argument should be greater than or equal to 1");
}
};
///
/// \class break_exception
/// \brief thrown when executing the break builtin
///
class break_exception: public loop_control_exception
{
protected:
/// \brief rethrow the exception itself
virtual void rethrow()
{
throw *this;
}
public:
/// \brief the constructor of the exception
/// \param c the nested block counter
explicit break_exception(int c): loop_control_exception(c) {
if(c < 1)
throw libbash::illegal_argument_exception("break: argument should be greater than or equal to 1");
}
};
class suppress_output: public std::exception
{
};
#endif
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