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1 | /* parser.h |
| 2 | * |
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3 | * Copyright (c) 2006, 2007, Larry Wall and others |
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4 | * |
| 5 | * You may distribute under the terms of either the GNU General Public |
| 6 | * License or the Artistic License, as specified in the README file. |
| 7 | * |
| 8 | * This file defines the layout of the parser object used by the parser |
| 9 | * and lexer (perly.c, toke,c). |
| 10 | */ |
| 11 | |
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12 | #define YYEMPTY (-2) |
| 13 | |
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14 | typedef struct { |
| 15 | YYSTYPE val; /* semantic value */ |
| 16 | short state; |
| 17 | AV *comppad; /* value of PL_comppad when this value was created */ |
| 18 | #ifdef DEBUGGING |
| 19 | const char *name; /* token/rule name for -Dpv */ |
| 20 | #endif |
| 21 | } yy_stack_frame; |
| 22 | |
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23 | typedef struct yy_parser { |
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24 | |
| 25 | /* parser state */ |
| 26 | |
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27 | struct yy_parser *old_parser; /* previous value of PL_parser */ |
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28 | int yychar; /* The lookahead symbol. */ |
| 29 | YYSTYPE yylval; /* value of lookahead symbol, set by yylex() */ |
| 30 | |
| 31 | /* Number of tokens to shift before error messages enabled. */ |
| 32 | int yyerrstatus; |
| 33 | |
| 34 | int stack_size; |
| 35 | int yylen; /* length of active reduction */ |
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36 | yy_stack_frame *stack; /* base of stack */ |
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37 | yy_stack_frame *ps; /* current stack frame */ |
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38 | |
| 39 | /* lexer state */ |
| 40 | |
| 41 | I32 lex_brackets; /* bracket count */ |
| 42 | I32 lex_casemods; /* casemod count */ |
| 43 | char *lex_brackstack;/* what kind of brackets to pop */ |
| 44 | char *lex_casestack; /* what kind of case mods in effect */ |
| 45 | U32 lex_defer; /* state after determined token */ |
| 46 | I32 lex_dojoin; /* doing an array interpolation */ |
| 47 | int lex_expect; /* expect after determined token */ |
| 48 | I32 lex_formbrack; /* bracket count at outer format level */ |
| 49 | OP *lex_inpat; /* in pattern $) and $| are special */ |
| 50 | I32 lex_inwhat; /* what kind of quoting are we in */ |
| 51 | OP *lex_op; /* extra info to pass back on op */ |
| 52 | SV *lex_repl; /* runtime replacement from s/// */ |
| 53 | I32 lex_starts; /* how many interps done on level */ |
| 54 | SV *lex_stuff; /* runtime pattern from m// or s/// */ |
| 55 | I32 multi_start; /* 1st line of multi-line string */ |
| 56 | I32 multi_open; /* delimiter of said string */ |
| 57 | I32 multi_close; /* delimiter of said string */ |
| 58 | char pending_ident; /* pending identifier lookup */ |
| 59 | bool preambled; |
| 60 | SUBLEXINFO sublex_info; |
| 61 | |
| 62 | #ifdef PERL_MAD |
| 63 | SV *endwhite; |
| 64 | I32 faketokens; |
| 65 | I32 lasttoke; |
| 66 | SV *nextwhite; |
| 67 | I32 realtokenstart; |
| 68 | SV *skipwhite; |
| 69 | SV *thisclose; |
| 70 | MADPROP * thismad; |
| 71 | SV *thisopen; |
| 72 | SV *thisstuff; |
| 73 | SV *thistoken; |
| 74 | SV *thiswhite; |
| 75 | #endif |
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76 | } yy_parser; |
| 77 | |
| 78 | |
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