llex.h
上传用户:dzyhzl
上传日期:2019-04-29
资源大小:56270k
文件大小:2k
- /*
- ** $Id: llex.h,v 1.31 2000/09/27 17:41:58 roberto 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