cpp-ethereum/libdevcore/Exceptions.h

/*
	This file is part of cpp-ethereum.

	cpp-ethereum 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 3 of the License, or
	(at your option) any later version.

	cpp-ethereum 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 cpp-ethereum.  If not, see <http://www.gnu.org/licenses/>.
*/
/** @file Exceptions.h
 * @author Gav Wood <i@gavwood.com>
 * @date 2014
 */

#pragma once

#include <exception>
#include <string>
#include <boost/exception/exception.hpp>
#include <boost/exception/info.hpp>
#include <boost/exception/info_tuple.hpp>
#include <boost/exception/diagnostic_information.hpp>
#include <boost/throw_exception.hpp>
#include <boost/tuple/tuple.hpp>
#include "CommonData.h"
#include "FixedHash.h"

namespace dev
{

/// Base class for all exceptions.
struct Exception: virtual std::exception, virtual boost::exception
{
	Exception(std::string _message = std::string()): m_message(std::move(_message)) {}
	const char* what() const noexcept override { return m_message.empty() ? std::exception::what() : m_message.c_str(); }

private:
	std::string m_message;
};

#define DEV_SIMPLE_EXCEPTION(X) struct X: virtual Exception { const char* what() const noexcept override { return #X; } }

/// Base class for all RLP exceptions.
struct RLPException: virtual Exception { RLPException(std::string _message = std::string()): Exception(_message) {} };
#define DEV_SIMPLE_EXCEPTION_RLP(X) struct X: virtual RLPException { const char* what() const noexcept override { return #X; } }

DEV_SIMPLE_EXCEPTION_RLP(BadCast);
DEV_SIMPLE_EXCEPTION_RLP(BadRLP);
DEV_SIMPLE_EXCEPTION_RLP(OversizeRLP);
DEV_SIMPLE_EXCEPTION_RLP(UndersizeRLP);

DEV_SIMPLE_EXCEPTION(BadHexCharacter);
DEV_SIMPLE_EXCEPTION(NoNetworking);
DEV_SIMPLE_EXCEPTION(NoUPnPDevice);
DEV_SIMPLE_EXCEPTION(RootNotFound);
struct BadRoot: virtual Exception { public: BadRoot(h256 const& _root): Exception("BadRoot " + _root.hex()), root(_root) {} h256 root; };
DEV_SIMPLE_EXCEPTION(FileError);
DEV_SIMPLE_EXCEPTION(Overflow);
DEV_SIMPLE_EXCEPTION(FailedInvariant);
DEV_SIMPLE_EXCEPTION(ValueTooLarge);

struct InterfaceNotSupported: virtual Exception { public: InterfaceNotSupported(std::string _f): Exception("Interface " + _f + " not supported.") {} };
struct ExternalFunctionFailure: virtual Exception { public: ExternalFunctionFailure(std::string _f): Exception("Function " + _f + "() failed.") {} };

// error information to be added to exceptions
using errinfo_invalidSymbol = boost::error_info<struct tag_invalidSymbol, char>;
using errinfo_wrongAddress = boost::error_info<struct tag_address, std::string>;
using errinfo_comment = boost::error_info<struct tag_comment, std::string>;
using errinfo_required = boost::error_info<struct tag_required, bigint>;
using errinfo_got = boost::error_info<struct tag_got, bigint>;
using errinfo_min = boost::error_info<struct tag_min, bigint>;
using errinfo_max = boost::error_info<struct tag_max, bigint>;
using RequirementError = boost::tuple<errinfo_required, errinfo_got>;
using errinfo_hash256 = boost::error_info<struct tag_hash, h256>;
using errinfo_required_h256 = boost::error_info<struct tag_required_h256, h256>;
using errinfo_got_h256 = boost::error_info<struct tag_get_h256, h256>;
using Hash256RequirementError = boost::tuple<errinfo_required_h256, errinfo_got_h256>;
using errinfo_extraData = boost::error_info<struct tag_extraData, bytes>;

}