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/*
** $Id: llex.h,v 1.3 2001/11/26 23:00:24 darkgod Exp $
** Lexical Analyzer
** See Copyright Notice in lua.h
*/
#ifndef llex_h
#define llex_h
#include "lobject.h"
#include "lzio.h"
#define FIRST_RESERVED 257
/* maximum length of a reserved word (+1 for final 0) */
#define TOKEN_LEN 15
/*
* WARNING: if you change the order of this enumeration,
* grep "ORDER RESERVED"
*/
enum RESERVED {
/* terminal symbols denoted by reserved words */
TK_AND = FIRST_RESERVED, TK_BREAK,
TK_DO, TK_ELSE, TK_ELSEIF, TK_END, TK_FOR, TK_FUNCTION, TK_IF, TK_LOCAL,
TK_NIL, TK_NOT, TK_OR, TK_REPEAT, TK_RETURN, TK_THEN, TK_UNTIL, TK_WHILE,
/* other terminal symbols */
TK_NAME, TK_CONCAT, TK_DOTS, TK_EQ, TK_GE, TK_LE, TK_NE, TK_NUMBER,
TK_STRING, TK_EOS
};
/* number of reserved words */
#define NUM_RESERVED ((int)(TK_WHILE-FIRST_RESERVED+1))
typedef union {
Number r;
TString *ts;
} SemInfo; /* semantics information */
typedef struct Token {
int token;
SemInfo seminfo;
} Token;
typedef struct LexState {
int current; /* current character */
Token t; /* current token */
Token lookahead; /* look ahead token */
struct FuncState *fs; /* `FuncState' is private to the parser */
struct lua_State *L;
struct zio *z; /* input stream */
int linenumber; /* input line counter */
int lastline; /* line of last token `consumed' */
TString *source; /* current source name */
} LexState;
void luaX_init (lua_State *L);
void luaX_setinput (lua_State *L, LexState *LS, ZIO *z, TString *source);
int luaX_lex (LexState *LS, SemInfo *seminfo);
void luaX_checklimit (LexState *ls, int val, int limit, const char *msg);
void luaX_syntaxerror (LexState *ls, const char *s, const char *token);
void luaX_error (LexState *ls, const char *s, int token);
void luaX_token2str (int token, char *s);
#endif
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