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119 lines
3.9 KiB
C
119 lines
3.9 KiB
C
/* parser.h
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*
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* Copyright (c) 2006, 2007, Larry Wall and others
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*
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* You may distribute under the terms of either the GNU General Public
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* License or the Artistic License, as specified in the README file.
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*
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* This file defines the layout of the parser object used by the parser
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* and lexer (perly.c, toke,c).
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*/
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#define YYEMPTY (-2)
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typedef struct {
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YYSTYPE val; /* semantic value */
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short state;
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I32 savestack_ix; /* size of savestack at this state */
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AV *comppad; /* value of PL_comppad when this value was created */
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#ifdef DEBUGGING
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const char *name; /* token/rule name for -Dpv */
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#endif
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} yy_stack_frame;
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typedef struct yy_parser {
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/* parser state */
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struct yy_parser *old_parser; /* previous value of PL_parser */
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YYSTYPE yylval; /* value of lookahead symbol, set by yylex() */
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int yychar; /* The lookahead symbol. */
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/* Number of tokens to shift before error messages enabled. */
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int yyerrstatus;
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int stack_size;
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int yylen; /* length of active reduction */
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yy_stack_frame *stack; /* base of stack */
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yy_stack_frame *ps; /* current stack frame */
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/* lexer state */
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I32 lex_brackets; /* bracket count */
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I32 lex_casemods; /* casemod count */
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char *lex_brackstack;/* what kind of brackets to pop */
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char *lex_casestack; /* what kind of case mods in effect */
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U8 lex_defer; /* state after determined token */
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bool lex_dojoin; /* doing an array interpolation */
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U8 lex_expect; /* expect after determined token */
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U8 expect; /* how to interpret ambiguous tokens */
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I32 lex_formbrack; /* bracket count at outer format level */
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OP *lex_inpat; /* in pattern $) and $| are special */
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OP *lex_op; /* extra info to pass back on op */
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SV *lex_repl; /* runtime replacement from s/// */
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U16 lex_inwhat; /* what kind of quoting are we in */
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OPCODE last_lop_op; /* last list operator */
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I32 lex_starts; /* how many interps done on level */
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SV *lex_stuff; /* runtime pattern from m// or s/// */
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I32 multi_start; /* 1st line of multi-line string */
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I32 multi_end; /* last line of multi-line string */
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char multi_open; /* delimiter of said string */
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char multi_close; /* delimiter of said string */
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char pending_ident; /* pending identifier lookup */
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bool preambled;
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/* XXX I32 space */
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SUBLEXINFO sublex_info;
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SV *linestr; /* current chunk of src text */
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char *bufptr;
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char *oldbufptr;
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char *oldoldbufptr;
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char *bufend;
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char *linestart; /* beginning of most recently read line */
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char *last_uni; /* position of last named-unary op */
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char *last_lop; /* position of last list operator */
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line_t copline; /* current line number */
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U16 in_my; /* we're compiling a "my"/"our" declaration */
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U8 lex_state; /* next token is determined */
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U8 error_count; /* how many compile errors so far, max 10 */
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HV *in_my_stash; /* declared class of this "my" declaration */
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PerlIO *rsfp; /* current source file pointer */
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AV *rsfp_filters; /* holds chain of active source filters */
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#ifdef PERL_MAD
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SV *endwhite;
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I32 faketokens;
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I32 lasttoke;
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SV *nextwhite;
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I32 realtokenstart;
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SV *skipwhite;
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SV *thisclose;
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MADPROP * thismad;
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SV *thisopen;
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SV *thisstuff;
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SV *thistoken;
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SV *thiswhite;
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/* What we know when we're in LEX_KNOWNEXT state. */
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NEXTTOKE nexttoke[5]; /* value of next token, if any */
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I32 curforce;
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#else
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YYSTYPE nextval[5]; /* value of next token, if any */
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I32 nexttype[5]; /* type of next token */
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I32 nexttoke;
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#endif
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COP *saved_curcop; /* the previous PL_curcop */
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char tokenbuf[256];
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} yy_parser;
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/*
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* Local variables:
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* c-indentation-style: bsd
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* c-basic-offset: 4
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* indent-tabs-mode: t
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* End:
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*
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* ex: set ts=8 sts=4 sw=4 noet:
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*/
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