mirror of https://github.com/lua/lua.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
73 lines
1.9 KiB
73 lines
1.9 KiB
/*
|
|
** $Id: llex.h,v 1.37 2001/07/22 00:59:36 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 */
|
|
#define TOKEN_LEN (sizeof(l_s("function"))/sizeof(l_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_FOR, TK_FUNCTION, TK_GLOBAL, TK_IF,
|
|
TK_IN, 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 (cast(int, TK_WHILE-FIRST_RESERVED+1))
|
|
|
|
|
|
typedef union {
|
|
lua_Number r;
|
|
TString *ts;
|
|
} SemInfo; /* semantics information */
|
|
|
|
|
|
typedef struct Token {
|
|
int token;
|
|
SemInfo seminfo;
|
|
} Token;
|
|
|
|
|
|
typedef struct LexState {
|
|
l_charint 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 l_char *msg);
|
|
void luaX_syntaxerror (LexState *ls, const l_char *s, const l_char *token);
|
|
void luaX_error (LexState *ls, const l_char *s, int token);
|
|
void luaX_token2str (int token, l_char *s);
|
|
|
|
|
|
#endif
|
|
|