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Member "memcached-1.6.15/vendor/lua/src/llex.h" (1 Oct 2021, 2402 Bytes) of package /linux/www/memcached-1.6.15.tar.gz:


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    1 /*
    2 ** $Id: llex.h $
    3 ** Lexical Analyzer
    4 ** See Copyright Notice in lua.h
    5 */
    6 
    7 #ifndef llex_h
    8 #define llex_h
    9 
   10 #include <limits.h>
   11 
   12 #include "lobject.h"
   13 #include "lzio.h"
   14 
   15 
   16 /*
   17 ** Single-char tokens (terminal symbols) are represented by their own
   18 ** numeric code. Other tokens start at the following value.
   19 */
   20 #define FIRST_RESERVED  (UCHAR_MAX + 1)
   21 
   22 
   23 #if !defined(LUA_ENV)
   24 #define LUA_ENV     "_ENV"
   25 #endif
   26 
   27 
   28 /*
   29 * WARNING: if you change the order of this enumeration,
   30 * grep "ORDER RESERVED"
   31 */
   32 enum RESERVED {
   33   /* terminal symbols denoted by reserved words */
   34   TK_AND = FIRST_RESERVED, TK_BREAK,
   35   TK_DO, TK_ELSE, TK_ELSEIF, TK_END, TK_FALSE, TK_FOR, TK_FUNCTION,
   36   TK_GOTO, TK_IF, TK_IN, TK_LOCAL, TK_NIL, TK_NOT, TK_OR, TK_REPEAT,
   37   TK_RETURN, TK_THEN, TK_TRUE, TK_UNTIL, TK_WHILE,
   38   /* other terminal symbols */
   39   TK_IDIV, TK_CONCAT, TK_DOTS, TK_EQ, TK_GE, TK_LE, TK_NE,
   40   TK_SHL, TK_SHR,
   41   TK_DBCOLON, TK_EOS,
   42   TK_FLT, TK_INT, TK_NAME, TK_STRING
   43 };
   44 
   45 /* number of reserved words */
   46 #define NUM_RESERVED    (cast_int(TK_WHILE-FIRST_RESERVED + 1))
   47 
   48 
   49 typedef union {
   50   lua_Number r;
   51   lua_Integer i;
   52   TString *ts;
   53 } SemInfo;  /* semantics information */
   54 
   55 
   56 typedef struct Token {
   57   int token;
   58   SemInfo seminfo;
   59 } Token;
   60 
   61 
   62 /* state of the lexer plus state of the parser when shared by all
   63    functions */
   64 typedef struct LexState {
   65   int current;  /* current character (charint) */
   66   int linenumber;  /* input line counter */
   67   int lastline;  /* line of last token 'consumed' */
   68   Token t;  /* current token */
   69   Token lookahead;  /* look ahead token */
   70   struct FuncState *fs;  /* current function (parser) */
   71   struct lua_State *L;
   72   ZIO *z;  /* input stream */
   73   Mbuffer *buff;  /* buffer for tokens */
   74   Table *h;  /* to avoid collection/reuse strings */
   75   struct Dyndata *dyd;  /* dynamic structures used by the parser */
   76   TString *source;  /* current source name */
   77   TString *envn;  /* environment variable name */
   78 } LexState;
   79 
   80 
   81 LUAI_FUNC void luaX_init (lua_State *L);
   82 LUAI_FUNC void luaX_setinput (lua_State *L, LexState *ls, ZIO *z,
   83                               TString *source, int firstchar);
   84 LUAI_FUNC TString *luaX_newstring (LexState *ls, const char *str, size_t l);
   85 LUAI_FUNC void luaX_next (LexState *ls);
   86 LUAI_FUNC int luaX_lookahead (LexState *ls);
   87 LUAI_FUNC l_noret luaX_syntaxerror (LexState *ls, const char *s);
   88 LUAI_FUNC const char *luaX_token2str (LexState *ls, int token);
   89 
   90 
   91 #endif