ceph/src/civetweb/src/third_party/lua-5.3.3/src/llex.h

   1 /*
   2 ** $Id: llex.h,v 1.79 2016/05/02 14:02:12 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
  17 #if !defined(LUA_ENV)
  18 #define LUA_ENV         "_ENV"
  19 #endif
  20
  21
  22 /*
  23 * WARNING: if you change the order of this enumeration,
  24 * grep "ORDER RESERVED"
  25 */
  26 enum RESERVED {
  27   /* terminal symbols denoted by reserved words */
  28   TK_AND = FIRST_RESERVED, TK_BREAK,
  29   TK_DO, TK_ELSE, TK_ELSEIF, TK_END, TK_FALSE, TK_FOR, TK_FUNCTION,
  30   TK_GOTO, TK_IF, TK_IN, TK_LOCAL, TK_NIL, TK_NOT, TK_OR, TK_REPEAT,
  31   TK_RETURN, TK_THEN, TK_TRUE, TK_UNTIL, TK_WHILE,
  32   /* other terminal symbols */
  33   TK_IDIV, TK_CONCAT, TK_DOTS, TK_EQ, TK_GE, TK_LE, TK_NE,
  34   TK_SHL, TK_SHR,
  35   TK_DBCOLON, TK_EOS,
  36   TK_FLT, TK_INT, TK_NAME, TK_STRING
  37 };
  38
  39 /* number of reserved words */
  40 #define NUM_RESERVED    (cast(int, TK_WHILE-FIRST_RESERVED+1))
  41
  42
  43 typedef union {
  44   lua_Number r;
  45   lua_Integer i;
  46   TString *ts;
  47 } SemInfo;  /* semantics information */
  48
  49
  50 typedef struct Token {
  51   int token;
  52   SemInfo seminfo;
  53 } Token;
  54
  55
  56 /* state of the lexer plus state of the parser when shared by all
  57    functions */
  58 typedef struct LexState {
  59   int current;  /* current character (charint) */
  60   int linenumber;  /* input line counter */
  61   int lastline;  /* line of last token 'consumed' */
  62   Token t;  /* current token */
  63   Token lookahead;  /* look ahead token */
  64   struct FuncState *fs;  /* current function (parser) */
  65   struct lua_State *L;
  66   ZIO *z;  /* input stream */
  67   Mbuffer *buff;  /* buffer for tokens */
  68   Table *h;  /* to avoid collection/reuse strings */
  69   struct Dyndata *dyd;  /* dynamic structures used by the parser */
  70   TString *source;  /* current source name */
  71   TString *envn;  /* environment variable name */
  72 } LexState;
  73
  74
  75 LUAI_FUNC void luaX_init (lua_State *L);
  76 LUAI_FUNC void luaX_setinput (lua_State *L, LexState *ls, ZIO *z,
  77                               TString *source, int firstchar);
  78 LUAI_FUNC TString *luaX_newstring (LexState *ls, const char *str, size_t l);
  79 LUAI_FUNC void luaX_next (LexState *ls);
  80 LUAI_FUNC int luaX_lookahead (LexState *ls);
  81 LUAI_FUNC l_noret luaX_syntaxerror (LexState *ls, const char *s);
  82 LUAI_FUNC const char *luaX_token2str (LexState *ls, int token);
  83
  84
  85 #endif