76 lines
2.1 KiB
C++
76 lines
2.1 KiB
C++
// This file is distributed under the BSD License.
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// See LICENSE.TXT for details.
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#ifndef LANGKIT_PARSER_HPP_
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#define LANGKIT_PARSER_HPP_
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#include <boost/function.hpp>
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#include "langkit_lexer.hpp"
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typedef std::vector<TokenPtr>::iterator Token_Iterator;
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typedef std::tr1::shared_ptr<struct RuleImpl> RuleImplPtr;
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typedef boost::function<std::pair<Token_Iterator, bool>(Token_Iterator iter, Token_Iterator end, TokenPtr parent)> RuleFun;
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struct RuleImpl {
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int identifier;
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RuleFun rule;
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RuleImpl() : identifier(-1) {}
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RuleImpl(int id) : identifier(id) {}
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RuleImpl(RuleFun fun) : rule(fun) {}
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};
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std::pair<Token_Iterator, bool> String_Rule
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(Token_Iterator iter, Token_Iterator end, TokenPtr parent, const std::string &val, bool keep);
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std::pair<Token_Iterator, bool> Type_Rule
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(Token_Iterator iter, Token_Iterator end, TokenPtr parent, const int val, bool keep);
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std::pair<Token_Iterator, bool> Or_Rule
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(Token_Iterator iter, Token_Iterator end, TokenPtr parent, struct Rule lhs, struct Rule rhs);
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std::pair<Token_Iterator, bool> And_Rule
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(Token_Iterator iter, Token_Iterator end, TokenPtr parent, struct Rule lhs, struct Rule rhs);
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struct Rule {
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Rule() : impl(new RuleImpl(-1)) {}
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Rule(int id) : impl(new RuleImpl(id)) {}
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Rule(RuleFun fun) : impl(new RuleImpl(fun)) {}
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std::pair<Token_Iterator, bool> operator()(Token_Iterator iter, Token_Iterator end, TokenPtr parent);
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Rule &operator=(const Rule &rule) {
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impl->identifier = rule.get_impl()->identifier;
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impl->rule = rule.get_impl()->rule;
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return *this;
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}
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Rule operator|(const Rule &rhs) {
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return Rule(boost::bind(Or_Rule, _1, _2, _3, *this, rhs));
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}
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Rule operator&(const Rule &rhs) {
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return Rule(boost::bind(And_Rule, _1, _2, _3, *this, rhs));
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}
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void set_rule(RuleFun fun) {
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impl->rule = fun;
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}
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const RuleImplPtr get_impl() const { return impl; }
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private:
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RuleImplPtr impl;
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};
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Rule Str(const std::string &text, bool keep);
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Rule Id(int id, bool keep);
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Rule Str(const std::string &text);
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Rule Id(int id);
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#endif /* LANGKIT_PARSER_HPP_ */
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