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78 lines
2.1 KiB
78 lines
2.1 KiB
#ifndef ABAKUS_RESULT_H
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#define ABAKUS_RESULT_H
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/*
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* result.h - part of abakus
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* Copyright (C) 2004, 2005 Michael Pyne <michael.pyne@kdemail.net>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <tqstring.h>
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#include "node.h"
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#include "sharedptr.h"
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/**
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* A conceptual result from an expression parse. Used to determine if the
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* parse succeeded or failed. If it succeeded it will have a node value you
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* can query as the answer.
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*/
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class Result
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{
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public:
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typedef enum { Error, Null, Value } Type;
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/**
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* Default constructor, which constructs a "failed" Result.
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*/
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Result(const TQString &message = "");
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/**
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* Node constructor, which constructs a "succeeded" result.
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*/
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Result(NodePtr node);
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/**
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* Constructor, constructs a "null" result. This means that the
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* operation was successful, but did not result in a normal value.
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*/
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Result(Type type);
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bool failed() const { return m_type == Error; }
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Type type() const { return m_type; }
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TQString message() const { return m_message; }
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const NodePtr result() const { return m_node; }
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NodePtr result() { return m_node; }
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static Result *lastResult() { return m_lastResult; }
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static void setLastResult(const Result &result)
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{
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*m_lastResult = result;
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}
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private:
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NodePtr m_node;
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Type m_type;
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TQString m_message;
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static Result *m_lastResult;
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};
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#endif /* ABAKUS_RESULT_H */
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// vim: set et ts=8 sw=4:
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