Mercurial > vba-linux

     1 /*

     2 ** $Id: llex.h,v 1.58.1.1 2007/12/27 13:02:25 roberto Exp $

     3 ** Lexical Analyzer

     4 ** See Copyright Notice in lua.h

     5 */

     6 

     7 #ifndef llex_h

     8 #define llex_h

     9 

    10 #include "lobject.h"

    11 #include "lzio.h"

    12 

    13 

    14 #define FIRST_RESERVED	257

    15 

    16 /* maximum length of a reserved word */

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

    18 

    19 

    20 /*

    21 * WARNING: if you change the order of this enumeration,

    22 * grep "ORDER RESERVED"

    23 */

    24 enum 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_CONCAT, TK_DOTS, TK_EQ, TK_GE, TK_LE, TK_NE, TK_NUMBER,

    32   TK_NAME, TK_STRING, TK_EOS

    33 };

    34 

    35 /* number of reserved words */

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

    37 

    38 

    39 /* array with token `names' */

    40 LUAI_DATA const char *const luaX_tokens [];

    41 

    42 

    43 typedef union {

    44   lua_Number r;

    45   TString *ts;

    46 } SemInfo;  /* semantics information */

    47 

    48 

    49 typedef struct Token {

    50   int token;

    51   SemInfo seminfo;

    52 } Token;

    53 

    54 

    55 typedef struct LexState {

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

    57   int linenumber;  /* input line counter */

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

    59   Token t;  /* current token */

    60   Token lookahead;  /* look ahead token */

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

    62   struct lua_State *L;

    63   ZIO *z;  /* input stream */

    64   Mbuffer *buff;  /* buffer for tokens */

    65   TString *source;  /* current source name */

    66   char decpoint;  /* locale decimal point */

    67 } LexState;

    68 

    69 

    70 LUAI_FUNC void luaX_init (lua_State *L);

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

    72                               TString *source);

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

    74 LUAI_FUNC void luaX_next (LexState *ls);

    75 LUAI_FUNC void luaX_lookahead (LexState *ls);

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

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

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

    79 

    80 

    81 #endif
author	Robert McIntyre <rlm@mit.edu>
date	Sun, 04 Mar 2012 16:56:20 -0600
parents	27763b933818
children