** 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 */

#define TOKEN_LEN (sizeof("function")/sizeof(char))

/*

* 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_FALSE, TK_FOR, TK_FUNCTION,

TK_IF, TK_IN, TK_LOCAL, TK_NIL, TK_NOT, TK_OR, TK_REPEAT,

TK_RETURN, TK_THEN, TK_TRUE, TK_UNTIL, TK_WHILE,

TK_CONCAT, TK_DOTS, TK_EQ, TK_GE, TK_LE, TK_NE, TK_NUMBER,

TK_NAME, TK_STRING, TK_EOS

};

/* number of reserved words */

#define NUM_RESERVED (cast(int, TK_WHILE-FIRST_RESERVED+1))

/* array with token `names' */

LUAI_DATA const char *const luaX_tokens [];

typedef union {

lua_Number r;

TString *ts;

} SemInfo; /* semantics information */

typedef struct Token {

int token;

SemInfo seminfo;

} Token;

typedef struct LexState {

int current; /* current character (charint) */

int linenumber; /* input line counter */

int lastline; /* line of last token `consumed' */

Token t; /* current token */

Token lookahead; /* look ahead token */

struct FuncState *fs; /* `FuncState' is private to the parser */

struct lua_State *L;

ZIO *z; /* input stream */

Mbuffer *buff; /* buffer for tokens */

TString *source; /* current source name */

char decpoint; /* locale decimal point */

} LexState;

LUAI_FUNC void luaX_init (lua_State *L);

LUAI_FUNC void luaX_setinput (lua_State *L, LexState *ls, ZIO *z,

TString *source);

LUAI_FUNC TString *luaX_newstring (LexState *ls, const char *str, size_t l);

LUAI_FUNC void luaX_next (LexState *ls);

LUAI_FUNC void luaX_lookahead (LexState *ls);

LUAI_FUNC void luaX_lexerror (LexState *ls, const char *msg, int token);

LUAI_FUNC void luaX_syntaxerror (LexState *ls, const char *s);

LUAI_FUNC const char *luaX_token2str (LexState *ls, int token);