2 ** $Id: llex.h,v 1.47 2003/02/28 17:19:47 roberto Exp $
4 ** See Copyright Notice in lua.h
14 #define FIRST_RESERVED 257
16 /* maximum length of a reserved word */
17 #define TOKEN_LEN (sizeof("function")/sizeof(char))
21 * WARNING: if you change the order of this enumeration,
22 * grep "ORDER RESERVED"
25 /* terminal symbols denoted by reserved words */
26 TK_AND = FIRST_RESERVED, TK_BREAK,
27 TK_DO, TK_ELSE, TK_ELSEIF, TK_END, TK_FALSE, TK_FOR, TK_FUNCTION,
28 TK_IF, TK_IN, TK_LOCAL, TK_NIL, TK_NOT, TK_OR, TK_REPEAT,
29 TK_RETURN, TK_THEN, TK_TRUE, TK_UNTIL, TK_WHILE,
30 /* other terminal symbols */
31 TK_NAME, TK_CONCAT, TK_DOTS, TK_EQ, TK_GE, TK_LE, TK_NE, TK_NUMBER,
35 /* number of reserved words */
36 #define NUM_RESERVED (cast(int, TK_WHILE-FIRST_RESERVED+1))
42 } SemInfo; /* semantics information */
45 typedef struct Token {
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; /* `FuncState' is private to the parser */
59 ZIO *z; /* input stream */
60 Mbuffer *buff; /* buffer for tokens */
61 TString *source; /* current source name */
62 int nestlevel; /* level of nested non-terminals */
66 void luaX_init (lua_State *L);
67 void luaX_setinput (lua_State *L, LexState *LS, ZIO *z, TString *source);
68 int luaX_lex (LexState *LS, SemInfo *seminfo);
69 void luaX_checklimit (LexState *ls, int val, int limit, const char *msg);
70 void luaX_syntaxerror (LexState *ls, const char *s);
71 void luaX_errorline (LexState *ls, const char *s, const char *token, int line);
72 const char *luaX_token2str (LexState *ls, int token);