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/*
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/>.
*/
/**
* @author Christian <chris@ethereum.org>
* @date 2016
* Utilities to handle semantic versioning.
*/
#pragma once
#include <vector>
#include <libsolidity/parsing/Token.h>
namespace dev
{
namespace solidity
{
class SemVerError: dev::Exception
{
};
struct SemVerVersion
{
unsigned numbers[3];
std::string prerelease;
std::string build;
explicit SemVerVersion(std::string const& _versionString = "0.0.0");
};
struct SemVerMatchExpression
{
bool matches(SemVerVersion const& _version) const;
bool isValid() const { return !m_disjunction.empty(); }
struct MatchComponent
{
/// Prefix from < > <= >= ~ ^
Token::Value prefix = Token::Illegal;
/// Version, where unsigned(-1) in major, minor or patch denotes '*', 'x' or 'X'
SemVerVersion version;
/// Whether we have 1, 1.2 or 1.2.4
unsigned levelsPresent = 1;
bool matches(SemVerVersion const& _version) const;
};
struct Conjunction
{
std::vector<MatchComponent> components;
bool matches(SemVerVersion const& _version) const;
};
std::vector<Conjunction> m_disjunction;
};
class SemVerMatchExpressionParser
{
public:
SemVerMatchExpressionParser(std::vector<Token::Value> const& _tokens, std::vector<std::string> const& _literals):
m_tokens(_tokens), m_literals(_literals)
{}
SemVerMatchExpression parse();
private:
void reset();
void parseMatchExpression();
SemVerMatchExpression::MatchComponent parseMatchComponent();
unsigned parseVersionPart();
char currentChar() const;
char nextChar();
Token::Value currentToken() const;
void nextToken();
std::vector<Token::Value> m_tokens;
std::vector<std::string> m_literals;
unsigned m_pos = 0;
unsigned m_posInside = 0;
SemVerMatchExpression m_expression;
};
}
}
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