/*** $Id: llex.h,v 1.78 2014/10/29 15:38:24 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  #if !defined(LUA_ENV)#define LUA_ENV		"_ENV"#endif  /** 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_FALSE, TK_FOR, TK_FUNCTION,  TK_GOTO, TK_IF, TK_IN, TK_LOCAL, TK_NIL, TK_NOT, TK_OR, TK_REPEAT,  TK_RETURN, TK_THEN, TK_TRUE, TK_UNTIL, TK_WHILE,  /* other terminal symbols */  TK_IDIV, TK_CONCAT, TK_DOTS, TK_EQ, TK_GE, TK_LE, TK_NE,  TK_SHL, TK_SHR,  TK_DBCOLON, TK_EOS,  TK_FLT, TK_INT, TK_NAME, TK_STRING}; /* number of reserved words */#define NUM_RESERVED	(cast(int, TK_WHILE-FIRST_RESERVED+1))  typedef union {  lua_Number r;  lua_Integer i;  TString *ts;} SemInfo;  /* semantics information */  typedef struct Token {  int token;  SemInfo seminfo;} Token;  /* state of the lexer plus state of the parser when shared by all   functions */typedef struct LexState {  int current;  /* current character (charint) */  int linenumber;  /* input line counter */  int lastline;  /* line of last token 'consumed' */  Token t;  /* current token */  Token lookahead;  /* look ahead token */  struct FuncState *fs;  /* current function (parser) */  struct lua_State *L;  ZIO *z;  /* input stream */  Mbuffer *buff;  /* buffer for tokens */  Table *h;  /* to avoid collection/reuse strings */  struct Dyndata *dyd;  /* dynamic structures used by the parser */  TString *source;  /* current source name */  TString *envn;  /* environment variable name */  char decpoint;  /* locale decimal point */} LexState;  LUAI_FUNC void luaX_init (lua_State *L);LUAI_FUNC void luaX_setinput (lua_State *L, LexState *ls, ZIO *z,                              TString *source, int firstchar);LUAI_FUNC TString *luaX_newstring (LexState *ls, const char *str, size_t l);LUAI_FUNC void luaX_next (LexState *ls);LUAI_FUNC int luaX_lookahead (LexState *ls);LUAI_FUNC l_noret luaX_syntaxerror (LexState *ls, const char *s);LUAI_FUNC const char *luaX_token2str (LexState *ls, int token);  #endif