3 * Copyright (c) 2006, 2007, Larry Wall and others
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.
8 * This file defines the layout of the parser object used by the parser
9 * and lexer (perly.c, toke,c).
15 YYSTYPE val; /* semantic value */
17 AV *comppad; /* value of PL_comppad when this value was created */
19 const char *name; /* token/rule name for -Dpv */
23 typedef struct yy_parser {
27 struct yy_parser *old_parser; /* previous value of PL_parser */
28 YYSTYPE yylval; /* value of lookahead symbol, set by yylex() */
29 int yychar; /* The lookahead symbol. */
31 /* Number of tokens to shift before error messages enabled. */
35 int yylen; /* length of active reduction */
36 yy_stack_frame *stack; /* base of stack */
37 yy_stack_frame *ps; /* current stack frame */
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 U8 lex_defer; /* state after determined token */
46 bool lex_dojoin; /* doing an array interpolation */
47 U8 lex_expect; /* expect after determined token */
48 U8 expect; /* how to interpret ambiguous tokens */
49 I32 lex_formbrack; /* bracket count at outer format level */
50 OP *lex_inpat; /* in pattern $) and $| are special */
51 OP *lex_op; /* extra info to pass back on op */
52 SV *lex_repl; /* runtime replacement from s/// */
53 U16 lex_inwhat; /* what kind of quoting are we in */
54 OPCODE last_lop_op; /* last list operator */
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 */
58 I32 multi_end; /* last line of multi-line string */
59 char multi_open; /* delimiter of said string */
60 char multi_close; /* delimiter of said string */
61 char pending_ident; /* pending identifier lookup */
64 SUBLEXINFO sublex_info;
65 SV *linestr; /* current chunk of src text */
70 char *linestart; /* beginning of most recently read line */
71 char *last_uni; /* position of last named-unary op */
72 char *last_lop; /* position of last list operator */
73 line_t copline; /* current line number */
74 U16 in_my; /* we're compiling a "my"/"our" declaration */
75 U8 lex_state; /* next token is determined */
76 /* space for a U8 here */
77 HV *in_my_stash; /* declared class of this "my" declaration */
78 PerlIO *rsfp; /* current source file pointer */
79 AV *rsfp_filters; /* holds chain of active source filters */
80 U8 error_count; /* how many compile errors so far, max 10 */
96 /* What we know when we're in LEX_KNOWNEXT state. */
97 NEXTTOKE nexttoke[5]; /* value of next token, if any */
100 YYSTYPE nextval[5]; /* value of next token, if any */
101 I32 nexttype[5]; /* type of next token */
105 COP *saved_curcop; /* the previous PL_curcop */