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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 5205 | clevermous | 1 | /* |
| 2 | ** $Id: llex.h,v 1.72 2011/11/30 12:43:51 roberto Exp $ |
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| 3 | ** Lexical Analyzer |
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| 4 | ** See Copyright Notice in lua.h |
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| 5 | */ |
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| 6 | |||
| 7 | #ifndef llex_h |
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| 8 | #define llex_h |
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| 9 | |||
| 10 | #include "lobject.h" |
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| 11 | #include "lzio.h" |
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| 12 | |||
| 13 | |||
| 14 | #define FIRST_RESERVED 257 |
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| 15 | |||
| 16 | |||
| 17 | |||
| 18 | /* |
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| 19 | * WARNING: if you change the order of this enumeration, |
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| 20 | * grep "ORDER RESERVED" |
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| 21 | */ |
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| 22 | enum RESERVED { |
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| 23 | /* terminal symbols denoted by reserved words */ |
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| 24 | TK_AND = FIRST_RESERVED, TK_BREAK, |
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| 25 | TK_DO, TK_ELSE, TK_ELSEIF, TK_END, TK_FALSE, TK_FOR, TK_FUNCTION, |
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| 26 | TK_GOTO, TK_IF, TK_IN, TK_LOCAL, TK_NIL, TK_NOT, TK_OR, TK_REPEAT, |
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| 27 | TK_RETURN, TK_THEN, TK_TRUE, TK_UNTIL, TK_WHILE, |
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| 28 | /* other terminal symbols */ |
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| 29 | TK_CONCAT, TK_DOTS, TK_EQ, TK_GE, TK_LE, TK_NE, TK_DBCOLON, TK_EOS, |
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| 30 | TK_NUMBER, TK_NAME, TK_STRING |
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| 31 | }; |
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| 32 | |||
| 33 | /* number of reserved words */ |
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| 34 | #define NUM_RESERVED (cast(int, TK_WHILE-FIRST_RESERVED+1)) |
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| 35 | |||
| 36 | |||
| 37 | typedef union { |
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| 38 | lua_Number r; |
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| 39 | TString *ts; |
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| 40 | } SemInfo; /* semantics information */ |
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| 41 | |||
| 42 | |||
| 43 | typedef struct Token { |
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| 44 | int token; |
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| 45 | SemInfo seminfo; |
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| 46 | } Token; |
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| 47 | |||
| 48 | |||
| 49 | /* state of the lexer plus state of the parser when shared by all |
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| 50 | functions */ |
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| 51 | typedef struct LexState { |
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| 52 | int current; /* current character (charint) */ |
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| 53 | int linenumber; /* input line counter */ |
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| 54 | int lastline; /* line of last token `consumed' */ |
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| 55 | Token t; /* current token */ |
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| 56 | Token lookahead; /* look ahead token */ |
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| 57 | struct FuncState *fs; /* current function (parser) */ |
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| 58 | struct lua_State *L; |
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| 59 | ZIO *z; /* input stream */ |
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| 60 | Mbuffer *buff; /* buffer for tokens */ |
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| 61 | struct Dyndata *dyd; /* dynamic structures used by the parser */ |
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| 62 | TString *source; /* current source name */ |
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| 63 | TString *envn; /* environment variable name */ |
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| 64 | char decpoint; /* locale decimal point */ |
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| 65 | } LexState; |
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| 66 | |||
| 67 | |||
| 68 | LUAI_FUNC void luaX_init (lua_State *L); |
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| 69 | LUAI_FUNC void luaX_setinput (lua_State *L, LexState *ls, ZIO *z, |
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| 70 | TString *source, int firstchar); |
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| 71 | LUAI_FUNC TString *luaX_newstring (LexState *ls, const char *str, size_t l); |
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| 72 | LUAI_FUNC void luaX_next (LexState *ls); |
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| 73 | LUAI_FUNC int luaX_lookahead (LexState *ls); |
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| 74 | LUAI_FUNC l_noret luaX_syntaxerror (LexState *ls, const char *s); |
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| 75 | LUAI_FUNC const char *luaX_token2str (LexState *ls, int token); |
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| 76 | |||
| 77 | |||
| 78 | #endif |