ast.hpp
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	#pragma once

	#include <stack>
	#include <string>

	#include "astnode.hpp"

	class yy_extra_type {
	public:
	yy_extra_type() {
	first_lineno = 0;
	lineno = 1;
	terminated = false;
	last_token = -1;
	insert_token = -1;
	heredoc_yyleng = -1;
	short_tags = true;
	asp_tags = false;
	idx_expr = false;
	list_size = 0;
	pushStack();
	}

	bool short_tags; // `short_open_tag` in php.ini
	bool asp_tags; // `asp_tags` in php.ini
	bool idx_expr; // allow code like `foo()['bar']`
	size_t first_lineno; // line number before scanning the current token
	size_t lineno; // current line number being scanned.
	std::string error; // description of error (if terminated true)
	bool terminated; // becomes true when the parser terminates with an error
	int last_token; // the last token to be returned by the scanner
	int insert_token; // insert this token without reading from buffer
	size_t heredoc_yyleng; // last length of yytext while scanning
	std::string heredoc_label; // heredoc sentinel label
	std::stack<int> curly_stack; // tokens appearing before a {
	unsigned int list_size;

	xhpast::token_list_t token_list;

	/* Utility functions for checking proper tag closing */
	bool haveTag() {
	return !tag_stack.front().empty();
	}
	const std::string &peekTag() {
	return tag_stack.front().front();
	}
	void pushTag(const std::string &tag) {
	tag_stack.front().push_front(tag);
	}
	void popTag() {
	tag_stack.front().pop_front();
	}
	void pushStack() {
	tag_stack.push_front(std::deque<std::string>());
	}
	void popStack() {
	tag_stack.pop_front();
	}

	protected:
	std::deque<std::deque<std::string> > tag_stack;
	};

	#define YYSTYPE xhpast::Node *
	#define YY_HEADER_EXPORT_START_CONDITIONS
	#define YY_EXTRA_TYPE yy_extra_type*

	#include "parser.yacc.hpp"
	#ifndef FLEX_SCANNER
	#include "scanner.lex.hpp"
	#endif

	int xhpparse(void, YYSTYPE );
	void xhp_new_push_state(int s, struct yyguts_t* yyg);
	void xhp_new_pop_state(struct yyguts_t* yyg);
	void xhp_set_state(int s, struct yyguts_t* yyg);

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