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Tweak change 30841 so that B works on maint too.
[perl5.git] / parser.h
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1/* parser.h
2 *
bc641c27 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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14typedef 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
22735491 23typedef struct yy_parser {
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24
25 /* parser state */
26
22735491 27 struct yy_parser *old_parser; /* previous value of PL_parser */
5912531f 28 YYSTYPE yylval; /* value of lookahead symbol, set by yylex() */
9bd87817 29 int yychar; /* The lookahead symbol. */
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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 */
22735491 36 yy_stack_frame *stack; /* base of stack */
5912531f 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 */
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45 U8 lex_defer; /* state after determined token */
46 bool lex_dojoin; /* doing an array interpolation */
47 U8 lex_expect; /* expect after determined token */
53a7735b 48 U8 expect; /* how to interpret ambiguous tokens */
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49 I32 lex_formbrack; /* bracket count at outer format level */
50 OP *lex_inpat; /* in pattern $) and $| are special */
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51 OP *lex_op; /* extra info to pass back on op */
52 SV *lex_repl; /* runtime replacement from s/// */
651b5b28 53 U16 lex_inwhat; /* what kind of quoting are we in */
f06b5848 54 OPCODE last_lop_op; /* last list operator */
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55 I32 lex_starts; /* how many interps done on level */
56 SV *lex_stuff; /* runtime pattern from m// or s/// */
57 I32 multi_start; /* 1st line of multi-line string */
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58 char multi_open; /* delimiter of said string */
59 char multi_close; /* delimiter of said string */
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60 char pending_ident; /* pending identifier lookup */
61 bool preambled;
62 SUBLEXINFO sublex_info;
bdc0bf6f 63 SV *linestr; /* current chunk of src text */
53a7735b 64 line_t copline; /* current line number */
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65 char *bufptr;
66 char *oldbufptr;
67 char *oldoldbufptr;
68 char *bufend;
69 char *linestart; /* beginning of most recently read line */
70 char *last_uni; /* position of last named-unary op */
71 char *last_lop; /* position of last list operator */
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72
73#ifdef PERL_MAD
74 SV *endwhite;
75 I32 faketokens;
76 I32 lasttoke;
77 SV *nextwhite;
78 I32 realtokenstart;
79 SV *skipwhite;
80 SV *thisclose;
81 MADPROP * thismad;
82 SV *thisopen;
83 SV *thisstuff;
84 SV *thistoken;
85 SV *thiswhite;
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86
87/* What we know when we're in LEX_KNOWNEXT state. */
88 NEXTTOKE nexttoke[5]; /* value of next token, if any */
89 I32 curforce;
90#else
91 YYSTYPE nextval[5]; /* value of next token, if any */
92 I32 nexttype[5]; /* type of next token */
93 I32 nexttoke;
199e78b7 94#endif
fb205e7a 95
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96} yy_parser;
97
98