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Commit	Line	Data
	1	/*
	2	** $Id: llex.h,v 1.72 2011/11/30 12:43:51 roberto Exp $
	3	** Lexical Analyzer
	4	** See Copyright Notice in lua.h
	5	*/
	6
	7	#ifndef llex_h
	8	#define llex_h
	9
	10	#include "lobject.h"
	11	#include "lzio.h"
	12
	13
	14	#define FIRST_RESERVED 257
	15
	16
	17
	18	/*
	19	* WARNING: if you change the order of this enumeration,
	20	* grep "ORDER RESERVED"
	21	*/
	22	enum RESERVED {
	23	/* terminal symbols denoted by reserved words */
	24	TK_AND = FIRST_RESERVED, TK_BREAK,
	25	TK_DO, TK_ELSE, TK_ELSEIF, TK_END, TK_FALSE, TK_FOR, TK_FUNCTION,
	26	TK_GOTO, TK_IF, TK_IN, TK_LOCAL, TK_NIL, TK_NOT, TK_OR, TK_REPEAT,
	27	TK_RETURN, TK_THEN, TK_TRUE, TK_UNTIL, TK_WHILE,
	28	/* other terminal symbols */
	29	TK_CONCAT, TK_DOTS, TK_EQ, TK_GE, TK_LE, TK_NE, TK_DBCOLON, TK_EOS,
	30	TK_NUMBER, TK_NAME, TK_STRING
	31	};
	32
	33	/* number of reserved words */
	34	#define NUM_RESERVED (cast(int, TK_WHILE-FIRST_RESERVED+1))
	35
	36
	37	typedef union {
	38	lua_Number r;
	39	TString *ts;
	40	} SemInfo; /* semantics information */
	41
	42
	43	typedef struct Token {
	44	int token;
	45	SemInfo seminfo;
	46	} Token;
	47
	48
	49	/* state of the lexer plus state of the parser when shared by all
	50	functions */
	51	typedef struct LexState {
	52	int current; /* current character (charint) */
	53	int linenumber; /* input line counter */
	54	int lastline; /* line of last token `consumed' */
	55	Token t; /* current token */
	56	Token lookahead; /* look ahead token */
	57	struct FuncState fs; / current function (parser) */
	58	struct lua_State *L;
	59	ZIO z; / input stream */
	60	Mbuffer buff; / buffer for tokens */
	61	struct Dyndata dyd; / dynamic structures used by the parser */
	62	TString source; / current source name */
	63	TString envn; / environment variable name */
	64	char decpoint; /* locale decimal point */
	65	} LexState;
	66
	67
	68	LUAI_FUNC void luaX_init (lua_State *L);
	69	LUAI_FUNC void luaX_setinput (lua_State L, LexState ls, ZIO *z,
	70	TString *source, int firstchar);
	71	LUAI_FUNC TString luaX_newstring (LexState ls, const char *str, size_t l);
	72	LUAI_FUNC void luaX_next (LexState *ls);
	73	LUAI_FUNC int luaX_lookahead (LexState *ls);
	74	LUAI_FUNC l_noret luaX_syntaxerror (LexState ls, const char s);
	75	LUAI_FUNC const char luaX_token2str (LexState ls, int token);
	76
	77
	78	#endif