module/lua/llex.h

   1 /* BEGIN CSTYLED */
   2 /*
   3 ** $Id: llex.h,v 1.72.1.1 2013/04/12 18:48:47 roberto Exp $
   4 ** Lexical Analyzer
   5 ** See Copyright Notice in lua.h
   6 */
   7
   8 #ifndef llex_h
   9 #define llex_h
  10
  11 #include "lobject.h"
  12 #include "lzio.h"
  13
  14
  15 #define FIRST_RESERVED  257
  16
  17
  18
  19 /*
  20 * WARNING: if you change the order of this enumeration,
  21 * grep "ORDER RESERVED"
  22 */
  23 enum RESERVED {
  24   /* terminal symbols denoted by reserved words */
  25   TK_AND = FIRST_RESERVED, TK_BREAK,
  26   TK_DO, TK_ELSE, TK_ELSEIF, TK_END, TK_FALSE, TK_FOR, TK_FUNCTION,
  27   TK_GOTO, TK_IF, TK_IN, TK_LOCAL, TK_NIL, TK_NOT, TK_OR, TK_REPEAT,
  28   TK_RETURN, TK_THEN, TK_TRUE, TK_UNTIL, TK_WHILE,
  29   /* other terminal symbols */
  30   TK_CONCAT, TK_DOTS, TK_EQ, TK_GE, TK_LE, TK_NE, TK_DBCOLON, TK_EOS,
  31   TK_NUMBER, TK_NAME, TK_STRING
  32 };
  33
  34 /* number of reserved words */
  35 #define NUM_RESERVED    (cast(int, TK_WHILE-FIRST_RESERVED+1))
  36
  37
  38 typedef union {
  39   lua_Number r;
  40   TString *ts;
  41 } SemInfo;  /* semantics information */
  42
  43
  44 typedef struct Token {
  45   int token;
  46   SemInfo seminfo;
  47 } Token;
  48
  49 #ifdef current
  50 #undef current
  51 #endif
  52
  53 /* state of the lexer plus state of the parser when shared by all
  54    functions */
  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;  /* current function (parser) */
  62   struct lua_State *L;
  63   ZIO *z;  /* input stream */
  64   Mbuffer *buff;  /* buffer for tokens */
  65   struct Dyndata *dyd;  /* dynamic structures used by the parser */
  66   TString *source;  /* current source name */
  67   TString *envn;  /* environment variable name */
  68   char decpoint;  /* locale decimal point */
  69 } LexState;
  70
  71
  72 LUAI_FUNC void luaX_init (lua_State *L);
  73 LUAI_FUNC void luaX_setinput (lua_State *L, LexState *ls, ZIO *z,
  74                               TString *source, int firstchar);
  75 LUAI_FUNC TString *luaX_newstring (LexState *ls, const char *str, size_t l);
  76 LUAI_FUNC void luaX_next (LexState *ls);
  77 LUAI_FUNC int luaX_lookahead (LexState *ls);
  78 LUAI_FUNC l_noret luaX_syntaxerror (LexState *ls, const char *s);
  79 LUAI_FUNC const char *luaX_token2str (LexState *ls, int token);
  80
  81
  82 #endif
  83 /* END CSTYLED */