X-Git-Url: https://perl5.git.perl.org/perl5.git/blobdiff_plain/1f0c31d794e9bf22a4693a68132831645e77e84d..8b12970a83017badfde9752dbd1480e612591839:/parser.h diff --git a/parser.h b/parser.h index 3cb3135..dc5e89d 100644 --- a/parser.h +++ b/parser.h @@ -1,12 +1,12 @@ /* parser.h * - * Copyright (c) 2006, 2007, Larry Wall and others + * Copyright (c) 2006, 2007, 2009, 2010, 2011 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. * * This file defines the layout of the parser object used by the parser - * and lexer (perly.c, toke,c). + * and lexer (perly.c, toke.c). */ #define YYEMPTY (-2) @@ -15,12 +15,23 @@ typedef struct { YYSTYPE val; /* semantic value */ short state; I32 savestack_ix; /* size of savestack at this state */ - AV *comppad; /* value of PL_comppad when this value was created */ + CV *compcv; /* value of PL_compcv when this value was created */ #ifdef DEBUGGING const char *name; /* token/rule name for -Dpv */ #endif } yy_stack_frame; +/* Fields that need to be shared with (i.e., visible to) inner lex- + ing scopes. */ +typedef struct yy_lexshared { + struct yy_lexshared *ls_prev; + SV *ls_linestr; /* mirrors PL_parser->linestr */ + char *ls_bufptr; /* mirrors PL_parser->bufptr */ + char *re_eval_start; /* start of "(?{..." text */ + SV *re_eval_str; /* "(?{...})" text */ + line_t herelines; /* number of lines in here-doc */ +} LEXSHARED; + typedef struct yy_parser { /* parser state */ @@ -39,7 +50,7 @@ typedef struct yy_parser { /* lexer state */ - I32 lex_brackets; /* bracket count */ + I32 lex_brackets; /* square and curly 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 */ @@ -52,32 +63,40 @@ typedef struct yy_parser { 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 */ + OPCODE last_lop_op; /* last named list or unary 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 */ I32 multi_end; /* last 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; - /* XXX I32 space */ + bool lex_re_reparsing; /* we're doing G_RE_REPARSING */ + I32 lex_allbrackets;/* (), [], {}, ?: bracket count */ SUBLEXINFO sublex_info; + LEXSHARED *lex_shared; SV *linestr; /* current chunk of src text */ - char *bufptr; - char *oldbufptr; - char *oldoldbufptr; + char *bufptr; /* carries the cursor (current parsing + position) from one invocation of yylex + to the next */ + char *oldbufptr; /* in yylex, beginning of current token */ + char *oldoldbufptr; /* in yylex, beginning of previous token */ 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 */ - line_t copline; /* current line number */ + /* copline is used to pass a specific line number to newSTATEOP. It + is a one-time line number, as newSTATEOP invalidates it (sets it to + NOLINE) after using it. The purpose of this is to report line num- + bers in multiline constructs using the number of the first line. */ + line_t copline; U16 in_my; /* we're compiling a "my"/"our" declaration */ U8 lex_state; /* next token is determined */ U8 error_count; /* how many compile errors so far, max 10 */ HV *in_my_stash; /* declared class of this "my" declaration */ PerlIO *rsfp; /* current source file pointer */ AV *rsfp_filters; /* holds chain of active source filters */ + U8 form_lex_state; /* remember lex_state when parsing fmt */ #ifdef PERL_MAD SV *endwhite; @@ -105,6 +124,53 @@ typedef struct yy_parser { COP *saved_curcop; /* the previous PL_curcop */ char tokenbuf[256]; + U8 lex_fakeeof; /* precedence at which to fake EOF */ + U8 lex_flags; + PERL_BITFIELD16 in_pod:1; /* lexer is within a =pod section */ + PERL_BITFIELD16 filtered:1; /* source filters in evalbytes */ + PERL_BITFIELD16 saw_infix_sigil:1; /* saw & or * or % operator */ } yy_parser; - +/* flags for lexer API */ +#define LEX_STUFF_UTF8 0x00000001 +#define LEX_KEEP_PREVIOUS 0x00000002 + +#ifdef PERL_CORE +# define LEX_START_SAME_FILTER 0x00000001 +# define LEX_IGNORE_UTF8_HINTS 0x00000002 +# define LEX_EVALBYTES 0x00000004 +# define LEX_START_COPIED 0x00000008 +# define LEX_DONT_CLOSE_RSFP 0x00000010 +# define LEX_START_FLAGS \ + (LEX_START_SAME_FILTER|LEX_START_COPIED \ + |LEX_IGNORE_UTF8_HINTS|LEX_EVALBYTES|LEX_DONT_CLOSE_RSFP) +#endif + +/* flags for parser API */ +#define PARSE_OPTIONAL 0x00000001 + +/* values for lex_fakeeof */ +enum { + LEX_FAKEEOF_NEVER, /* don't fake EOF */ + LEX_FAKEEOF_CLOSING, /* fake EOF at unmatched closing punctuation */ + LEX_FAKEEOF_NONEXPR, /* ... and at token that can't be in expression */ + LEX_FAKEEOF_LOWLOGIC, /* ... and at low-precedence logic operator */ + LEX_FAKEEOF_COMMA, /* ... and at comma */ + LEX_FAKEEOF_ASSIGN, /* ... and at assignment operator */ + LEX_FAKEEOF_IFELSE, /* ... and at ?: operator */ + LEX_FAKEEOF_RANGE, /* ... and at range operator */ + LEX_FAKEEOF_LOGIC, /* ... and at logic operator */ + LEX_FAKEEOF_BITWISE, /* ... and at bitwise operator */ + LEX_FAKEEOF_COMPARE, /* ... and at comparison operator */ + LEX_FAKEEOF_MAX +}; + +/* + * Local variables: + * c-indentation-style: bsd + * c-basic-offset: 4 + * indent-tabs-mode: nil + * End: + * + * ex: set ts=8 sts=4 sw=4 et: + */