#ifndef TPARSER_INCLUDED
#define TPARSER_INCLUDED
 
#include "tcommon.h"
#include "tgrammar.h"
 
#undef DVAPI
#undef DVVAR
#ifdef TNZBASE_EXPORTS
#define DVAPI DV_EXPORT_API
#define DVVAR DV_EXPORT_VAR
#else
#define DVAPI DV_IMPORT_API
#define DVVAR DV_IMPORT_VAR
#endif
 
namespace TSyntax
{
 
struct DVAPI SyntaxToken {
	int m_pos, m_length;
	TokenType m_type;
};
 
class DVAPI Parser
{
	class Imp;
	Imp *m_imp;
 
public:
	Parser(const Grammar *grammar);
	~Parser();
 
	//! parse the input string and create the corresponding calculator
	//! (returns 0 if the text contains mistakes)
	Calculator *parse(string text);
 
	//! return true if the last parsed string was correct
	bool isValid() const;
 
	//! return the last parsed string
	string getText() const;
 
	//! return the last error code (if the last parsed string was correct then returns "")
	string getError() const;
 
	//! if getError() != "" returns the position of the last parsed token
	//! the pair contains the indices of the first and the last characters of the token
	std::pair<int, int> getErrorPos() const;
 
	enum SyntaxStatus {
		Correct,
		Incomplete,
		Error,
		ExtraIgnored
	};
	SyntaxStatus checkSyntax(std::vector<SyntaxToken> &tokens, string text);
 
	void getSuggestions(Grammar::Suggestions &suggestions, string text);
	string getCurrentPatternString(string text);
 
private:
	// not implemented
	Parser(const Parser &);
	Parser &operator=(const Parser &);
};
 
} // namespace TSyntax
 
#endif