mirror of
https://github.com/GothenburgBitFactory/taskwarrior.git
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74 lines
3.5 KiB
C++
74 lines
3.5 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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//
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// Copyright 2013 - 2017, Paul Beckingham, Federico Hernandez.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included
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// in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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//
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// http://www.opensource.org/licenses/mit-license.php
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//
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////////////////////////////////////////////////////////////////////////////////
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#ifndef INCLUDED_EVAL
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#define INCLUDED_EVAL
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#include <vector>
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#include <string>
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#include <Lexer.h>
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#include <Variant.h>
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class Eval
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{
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public:
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Eval ();
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void addSource (bool (*fn)(const std::string&, Variant&));
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void evaluateInfixExpression (const std::string&, Variant&) const;
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void evaluatePostfixExpression (const std::string&, Variant&) const;
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void compileExpression (const std::vector <std::pair <std::string, Lexer::Type>>&);
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void evaluateCompiledExpression (Variant&);
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void debug (bool);
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static std::vector <std::string> getOperators ();
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static std::vector <std::string> getBinaryOperators ();
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private:
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void evaluatePostfixStack (const std::vector <std::pair <std::string, Lexer::Type>>&, Variant&) const;
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void infixToPostfix (std::vector <std::pair <std::string, Lexer::Type>>&) const;
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void infixParse (std::vector <std::pair <std::string, Lexer::Type>>&) const;
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bool parseLogical (std::vector <std::pair <std::string, Lexer::Type>>&, unsigned int &) const;
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bool parseRegex (std::vector <std::pair <std::string, Lexer::Type>>&, unsigned int &) const;
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bool parseEquality (std::vector <std::pair <std::string, Lexer::Type>>&, unsigned int &) const;
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bool parseComparative (std::vector <std::pair <std::string, Lexer::Type>>&, unsigned int &) const;
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bool parseArithmetic (std::vector <std::pair <std::string, Lexer::Type>>&, unsigned int &) const;
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bool parseGeometric (std::vector <std::pair <std::string, Lexer::Type>>&, unsigned int &) const;
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bool parseTag (std::vector <std::pair <std::string, Lexer::Type>>&, unsigned int &) const;
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bool parseUnary (std::vector <std::pair <std::string, Lexer::Type>>&, unsigned int &) const;
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bool parseExponent (std::vector <std::pair <std::string, Lexer::Type>>&, unsigned int &) const;
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bool parsePrimitive (std::vector <std::pair <std::string, Lexer::Type>>&, unsigned int &) const;
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bool identifyOperator (const std::string&, char&, unsigned int&, char&) const;
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std::string dump (std::vector <std::pair <std::string, Lexer::Type>>&) const;
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private:
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std::vector <bool (*)(const std::string&, Variant&)> _sources {};
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bool _debug {false};
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std::vector <std::pair <std::string, Lexer::Type>> _compiled {};
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};
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#endif
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