/* parser.h
*
- * Copyright (c) 2006 Larry Wall and others
+ * Copyright (c) 2006, 2007, Larry Wall and others
*
* You may distribute under the terms of either the GNU General Public
* License or the Artistic License, as specified in the README file.
* and lexer (perly.c, toke,c).
*/
+#define YYEMPTY (-2)
+
typedef struct {
YYSTYPE val; /* semantic value */
short state;
} yy_stack_frame;
typedef struct yy_parser {
+
+ /* parser state */
+
struct yy_parser *old_parser; /* previous value of PL_parser */
- int yychar; /* The lookahead symbol. */
YYSTYPE yylval; /* value of lookahead symbol, set by yylex() */
+ int yychar; /* The lookahead symbol. */
/* Number of tokens to shift before error messages enabled. */
int yyerrstatus;
int yylen; /* length of active reduction */
yy_stack_frame *stack; /* base of stack */
yy_stack_frame *ps; /* current stack frame */
+
+ /* lexer state */
+
+ I32 lex_brackets; /* bracket count */
+ I32 lex_casemods; /* casemod count */
+ char *lex_brackstack;/* what kind of brackets to pop */
+ char *lex_casestack; /* what kind of case mods in effect */
+ U8 lex_defer; /* state after determined token */
+ bool lex_dojoin; /* doing an array interpolation */
+ U8 lex_expect; /* expect after determined token */
+ U8 expect; /* how to interpret ambiguous tokens */
+ I32 lex_formbrack; /* bracket count at outer format level */
+ OP *lex_inpat; /* in pattern $) and $| are special */
+ OP *lex_op; /* extra info to pass back on op */
+ SV *lex_repl; /* runtime replacement from s/// */
+ U16 lex_inwhat; /* what kind of quoting are we in */
+ OPCODE last_lop_op; /* last list operator */
+ I32 lex_starts; /* how many interps done on level */
+ SV *lex_stuff; /* runtime pattern from m// or s/// */
+ I32 multi_start; /* 1st line of multi-line string */
+ char multi_open; /* delimiter of said string */
+ char multi_close; /* delimiter of said string */
+ char pending_ident; /* pending identifier lookup */
+ bool preambled;
+ SUBLEXINFO sublex_info;
+ SV *linestr; /* current chunk of src text */
+ line_t copline; /* current line number */
+ char *bufptr;
+ char *oldbufptr;
+ char *oldoldbufptr;
+ char *bufend;
+ char *linestart; /* beginning of most recently read line */
+ char *last_uni; /* position of last named-unary op */
+ char *last_lop; /* position of last list operator */
+ U8 lex_state; /* next token is determined */
+ PerlIO *rsfp; /* current source file pointer */
+ AV *rsfp_filters; /* holds chain of active source filters */
+
+#ifdef PERL_MAD
+ SV *endwhite;
+ I32 faketokens;
+ I32 lasttoke;
+ SV *nextwhite;
+ I32 realtokenstart;
+ SV *skipwhite;
+ SV *thisclose;
+ MADPROP * thismad;
+ SV *thisopen;
+ SV *thisstuff;
+ SV *thistoken;
+ SV *thiswhite;
+
+/* What we know when we're in LEX_KNOWNEXT state. */
+ NEXTTOKE nexttoke[5]; /* value of next token, if any */
+ I32 curforce;
+#else
+ YYSTYPE nextval[5]; /* value of next token, if any */
+ I32 nexttype[5]; /* type of next token */
+ I32 nexttoke;
+#endif
+
+ COP *saved_curcop; /* the previous PL_curcop */
+
} yy_parser;