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Extract commonly used Parser code to new Parser component
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40
src/Parser/Parsing/Matcher/MatcherAnd.h
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40
src/Parser/Parsing/Matcher/MatcherAnd.h
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#pragma once
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#include <iterator>
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#include <memory>
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#include "Parsing/IParserValue.h"
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#include "AbstractMatcher.h"
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template <typename TokenType>
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class MatcherAnd final : public AbstractMatcher<TokenType>
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{
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// TokenType must inherit IParserValue
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static_assert(std::is_base_of<IParserValue, TokenType>::value);
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std::vector<std::unique_ptr<AbstractMatcher<TokenType>>> m_matchers;
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protected:
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MatcherResult<TokenType> CanMatch(ILexer<TokenType>* lexer, const unsigned tokenOffset) override
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{
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auto matchResult = MatcherResult<TokenType>::Match(0);
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for (const std::unique_ptr<AbstractMatcher<TokenType>>& matcher : m_matchers)
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{
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MatcherResult<TokenType> result = matcher->Match(lexer, tokenOffset + matchResult.m_consumed_token_count);
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if (!result.m_matches)
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return MatcherResult<TokenType>::NoMatch();
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matchResult.Absorb(std::move(result));
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}
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return matchResult;
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}
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public:
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MatcherAnd(std::initializer_list<Movable<std::unique_ptr<AbstractMatcher<TokenType>>>> matchers)
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: m_matchers(std::make_move_iterator(matchers.begin()), std::make_move_iterator(matchers.end()))
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{
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}
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};
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