mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
b424446c5f
If ever you want to separate building analysis from scanning/parsing/ast, this will help.
110 lines
2.5 KiB
C++
110 lines
2.5 KiB
C++
/*
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This file is part of solidity.
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solidity 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 3 of the License, or
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(at your option) any later version.
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solidity 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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You should have received a copy of the GNU General Public License
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along with solidity. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @author Christian <chris@ethereum.org>
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* @date 2016
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* Utilities to handle semantic versioning.
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*/
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#pragma once
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#include <liblangutil/Token.h>
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#include <string>
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#include <vector>
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namespace langutil
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{
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class SemVerError: dev::Exception
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{
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};
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#undef major
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#undef minor
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struct SemVerVersion
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{
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unsigned numbers[3];
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std::string prerelease;
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std::string build;
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unsigned major() const { return numbers[0]; }
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unsigned minor() const { return numbers[1]; }
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unsigned patch() const { return numbers[2]; }
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bool isPrerelease() const { return !prerelease.empty(); }
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explicit SemVerVersion(std::string const& _versionString = "0.0.0");
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};
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struct SemVerMatchExpression
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{
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bool matches(SemVerVersion const& _version) const;
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bool isValid() const { return !m_disjunction.empty(); }
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struct MatchComponent
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{
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/// Prefix from < > <= >= ~ ^
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Token prefix = Token::Illegal;
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/// Version, where unsigned(-1) in major, minor or patch denotes '*', 'x' or 'X'
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SemVerVersion version;
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/// Whether we have 1, 1.2 or 1.2.4
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unsigned levelsPresent = 1;
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bool matches(SemVerVersion const& _version) const;
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};
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struct Conjunction
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{
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std::vector<MatchComponent> components;
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bool matches(SemVerVersion const& _version) const;
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};
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std::vector<Conjunction> m_disjunction;
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};
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class SemVerMatchExpressionParser
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{
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public:
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SemVerMatchExpressionParser(std::vector<Token> const& _tokens, std::vector<std::string> const& _literals):
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m_tokens(_tokens), m_literals(_literals)
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{}
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SemVerMatchExpression parse();
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private:
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void reset();
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void parseMatchExpression();
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SemVerMatchExpression::MatchComponent parseMatchComponent();
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unsigned parseVersionPart();
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char currentChar() const;
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char nextChar();
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Token currentToken() const;
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void nextToken();
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std::vector<Token> m_tokens;
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std::vector<std::string> m_literals;
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unsigned m_pos = 0;
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unsigned m_posInside = 0;
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SemVerMatchExpression m_expression;
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};
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}
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