69 lines
1.3 KiB
C++
69 lines
1.3 KiB
C++
/*
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* Copyright 2006-2009 Haiku, Inc. All Rights Reserved.
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* Distributed under the terms of the MIT License.
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*
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* Authors:
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* Ingo Weinhold <bonefish@cs.tu-berlin.de>
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* Stephan Aßmus <superstippi@gmx.de>
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*/
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#ifndef EXPRESSION_PARSER_H
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#define EXPRESSION_PARSER_H
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#include <String.h>
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class Tokenizer;
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class ParseException {
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public:
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ParseException(const char* message, int32 position)
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: message(message),
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position(position)
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{
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}
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ParseException(const ParseException& other)
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: message(other.message),
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position(other.position)
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{
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}
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BString message;
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int32 position;
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};
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struct Function;
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struct Token;
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class MAPM;
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class ExpressionParser {
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public:
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ExpressionParser();
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~ExpressionParser();
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void SetSupportHexInput(bool enabled);
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BString Evaluate(const char* expressionString);
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int64 EvaluateToInt64(const char* expressionString);
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double EvaluateToDouble(const char* expressionString);
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private:
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MAPM _ParseBinary();
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MAPM _ParseSum();
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MAPM _ParseProduct();
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MAPM _ParsePower();
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MAPM _ParseUnary();
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void _InitArguments(MAPM values[],
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int32 argumentCount);
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MAPM _ParseFunction(const Token& token);
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MAPM _ParseAtom();
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void _EatToken(int32 type);
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Tokenizer* fTokenizer;
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};
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#endif // EXPRESSION_PARSER_H
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