When execution of the program reaches a subroutine call, a call to
C<&DB::sub>(I<args>) is made instead, with C<$DB::sub> holding the
-name of the called subroutine. (This doesn't happen if the subroutine
-was compiled in the C<DB> package.)
+name of the called subroutine. (This doesn't happen if the calling
+subroutine was compiled in the C<DB> package.)
X<&DB::lsub>If the call is to an lvalue subroutine, and C<&DB::lsub>
is defined C<&DB::lsub>(I<args>) is called instead, otherwise falling
=item 1
- entering main::BEGIN
- entering Config::BEGIN
- Package lib/Exporter.pm.
- Package lib/Carp.pm.
- Package lib/Config.pm.
- entering Config::TIEHASH
- entering Exporter::import
- entering Exporter::export
- entering Config::myconfig
- entering Config::FETCH
- entering Config::FETCH
- entering Config::FETCH
- entering Config::FETCH
+ entering main::BEGIN
+ entering Config::BEGIN
+ Package lib/Exporter.pm.
+ Package lib/Carp.pm.
+ Package lib/Config.pm.
+ entering Config::TIEHASH
+ entering Exporter::import
+ entering Exporter::export
+ entering Config::myconfig
+ entering Config::FETCH
+ entering Config::FETCH
+ entering Config::FETCH
+ entering Config::FETCH
=item 2
- entering main::BEGIN
- entering Config::BEGIN
- Package lib/Exporter.pm.
- Package lib/Carp.pm.
- exited Config::BEGIN
- Package lib/Config.pm.
- entering Config::TIEHASH
- exited Config::TIEHASH
- entering Exporter::import
- entering Exporter::export
- exited Exporter::export
- exited Exporter::import
- exited main::BEGIN
- entering Config::myconfig
- entering Config::FETCH
- exited Config::FETCH
- entering Config::FETCH
- exited Config::FETCH
- entering Config::FETCH
+ entering main::BEGIN
+ entering Config::BEGIN
+ Package lib/Exporter.pm.
+ Package lib/Carp.pm.
+ exited Config::BEGIN
+ Package lib/Config.pm.
+ entering Config::TIEHASH
+ exited Config::TIEHASH
+ entering Exporter::import
+ entering Exporter::export
+ exited Exporter::export
+ exited Exporter::import
+ exited main::BEGIN
+ entering Config::myconfig
+ entering Config::FETCH
+ exited Config::FETCH
+ entering Config::FETCH
+ exited Config::FETCH
+ entering Config::FETCH
=item 3
- in $=main::BEGIN() from /dev/null:0
- in $=Config::BEGIN() from lib/Config.pm:2
- Package lib/Exporter.pm.
- Package lib/Carp.pm.
- Package lib/Config.pm.
- in $=Config::TIEHASH('Config') from lib/Config.pm:644
- in $=Exporter::import('Config', 'myconfig', 'config_vars') from /dev/null:0
- in $=Exporter::export('Config', 'main', 'myconfig', 'config_vars') from li
- in @=Config::myconfig() from /dev/null:0
- in $=Config::FETCH(ref(Config), 'package') from lib/Config.pm:574
- in $=Config::FETCH(ref(Config), 'baserev') from lib/Config.pm:574
- in $=Config::FETCH(ref(Config), 'PERL_VERSION') from lib/Config.pm:574
- in $=Config::FETCH(ref(Config), 'PERL_SUBVERSION') from lib/Config.pm:574
- in $=Config::FETCH(ref(Config), 'osname') from lib/Config.pm:574
- in $=Config::FETCH(ref(Config), 'osvers') from lib/Config.pm:574
+ in $=main::BEGIN() from /dev/null:0
+ in $=Config::BEGIN() from lib/Config.pm:2
+ Package lib/Exporter.pm.
+ Package lib/Carp.pm.
+ Package lib/Config.pm.
+ in $=Config::TIEHASH('Config') from lib/Config.pm:644
+ in $=Exporter::import('Config', 'myconfig', 'config_vars') from /dev/null:0
+ in $=Exporter::export('Config', 'main', 'myconfig', 'config_vars') from li
+ in @=Config::myconfig() from /dev/null:0
+ in $=Config::FETCH(ref(Config), 'package') from lib/Config.pm:574
+ in $=Config::FETCH(ref(Config), 'baserev') from lib/Config.pm:574
+ in $=Config::FETCH(ref(Config), 'PERL_VERSION') from lib/Config.pm:574
+ in $=Config::FETCH(ref(Config), 'PERL_SUBVERSION') from lib/Config.pm:574
+ in $=Config::FETCH(ref(Config), 'osname') from lib/Config.pm:574
+ in $=Config::FETCH(ref(Config), 'osvers') from lib/Config.pm:574
=item 4
- in $=main::BEGIN() from /dev/null:0
- in $=Config::BEGIN() from lib/Config.pm:2
- Package lib/Exporter.pm.
- Package lib/Carp.pm.
- out $=Config::BEGIN() from lib/Config.pm:0
- Package lib/Config.pm.
- in $=Config::TIEHASH('Config') from lib/Config.pm:644
- out $=Config::TIEHASH('Config') from lib/Config.pm:644
- in $=Exporter::import('Config', 'myconfig', 'config_vars') from /dev/null:0
- in $=Exporter::export('Config', 'main', 'myconfig', 'config_vars') from lib/
- out $=Exporter::export('Config', 'main', 'myconfig', 'config_vars') from lib/
- out $=Exporter::import('Config', 'myconfig', 'config_vars') from /dev/null:0
- out $=main::BEGIN() from /dev/null:0
- in @=Config::myconfig() from /dev/null:0
- in $=Config::FETCH(ref(Config), 'package') from lib/Config.pm:574
- out $=Config::FETCH(ref(Config), 'package') from lib/Config.pm:574
- in $=Config::FETCH(ref(Config), 'baserev') from lib/Config.pm:574
- out $=Config::FETCH(ref(Config), 'baserev') from lib/Config.pm:574
- in $=Config::FETCH(ref(Config), 'PERL_VERSION') from lib/Config.pm:574
- out $=Config::FETCH(ref(Config), 'PERL_VERSION') from lib/Config.pm:574
- in $=Config::FETCH(ref(Config), 'PERL_SUBVERSION') from lib/Config.pm:574
+ in $=main::BEGIN() from /dev/null:0
+ in $=Config::BEGIN() from lib/Config.pm:2
+ Package lib/Exporter.pm.
+ Package lib/Carp.pm.
+ out $=Config::BEGIN() from lib/Config.pm:0
+ Package lib/Config.pm.
+ in $=Config::TIEHASH('Config') from lib/Config.pm:644
+ out $=Config::TIEHASH('Config') from lib/Config.pm:644
+ in $=Exporter::import('Config', 'myconfig', 'config_vars') from /dev/null:0
+ in $=Exporter::export('Config', 'main', 'myconfig', 'config_vars') from lib/
+ out $=Exporter::export('Config', 'main', 'myconfig', 'config_vars') from lib/
+ out $=Exporter::import('Config', 'myconfig', 'config_vars') from /dev/null:0
+ out $=main::BEGIN() from /dev/null:0
+ in @=Config::myconfig() from /dev/null:0
+ in $=Config::FETCH(ref(Config), 'package') from lib/Config.pm:574
+ out $=Config::FETCH(ref(Config), 'package') from lib/Config.pm:574
+ in $=Config::FETCH(ref(Config), 'baserev') from lib/Config.pm:574
+ out $=Config::FETCH(ref(Config), 'baserev') from lib/Config.pm:574
+ in $=Config::FETCH(ref(Config), 'PERL_VERSION') from lib/Config.pm:574
+ out $=Config::FETCH(ref(Config), 'PERL_VERSION') from lib/Config.pm:574
+ in $=Config::FETCH(ref(Config), 'PERL_SUBVERSION') from lib/Config.pm:574
=item 5
- in $=main::BEGIN() from /dev/null:0
- in $=Config::BEGIN() from lib/Config.pm:2
- Package lib/Exporter.pm.
- Package lib/Carp.pm.
- out $=Config::BEGIN() from lib/Config.pm:0
- Package lib/Config.pm.
- in $=Config::TIEHASH('Config') from lib/Config.pm:644
- out $=Config::TIEHASH('Config') from lib/Config.pm:644
- in $=Exporter::import('Config', 'myconfig', 'config_vars') from /dev/null:0
- in $=Exporter::export('Config', 'main', 'myconfig', 'config_vars') from lib/E
- out $=Exporter::export('Config', 'main', 'myconfig', 'config_vars') from lib/E
- out $=Exporter::import('Config', 'myconfig', 'config_vars') from /dev/null:0
- out $=main::BEGIN() from /dev/null:0
- in @=Config::myconfig() from /dev/null:0
- in $=Config::FETCH('Config=HASH(0x1aa444)', 'package') from lib/Config.pm:574
- out $=Config::FETCH('Config=HASH(0x1aa444)', 'package') from lib/Config.pm:574
- in $=Config::FETCH('Config=HASH(0x1aa444)', 'baserev') from lib/Config.pm:574
- out $=Config::FETCH('Config=HASH(0x1aa444)', 'baserev') from lib/Config.pm:574
+ in $=main::BEGIN() from /dev/null:0
+ in $=Config::BEGIN() from lib/Config.pm:2
+ Package lib/Exporter.pm.
+ Package lib/Carp.pm.
+ out $=Config::BEGIN() from lib/Config.pm:0
+ Package lib/Config.pm.
+ in $=Config::TIEHASH('Config') from lib/Config.pm:644
+ out $=Config::TIEHASH('Config') from lib/Config.pm:644
+ in $=Exporter::import('Config', 'myconfig', 'config_vars') from /dev/null:0
+ in $=Exporter::export('Config', 'main', 'myconfig', 'config_vars') from lib/E
+ out $=Exporter::export('Config', 'main', 'myconfig', 'config_vars') from lib/E
+ out $=Exporter::import('Config', 'myconfig', 'config_vars') from /dev/null:0
+ out $=main::BEGIN() from /dev/null:0
+ in @=Config::myconfig() from /dev/null:0
+ in $=Config::FETCH('Config=HASH(0x1aa444)', 'package') from lib/Config.pm:574
+ out $=Config::FETCH('Config=HASH(0x1aa444)', 'package') from lib/Config.pm:574
+ in $=Config::FETCH('Config=HASH(0x1aa444)', 'baserev') from lib/Config.pm:574
+ out $=Config::FETCH('Config=HASH(0x1aa444)', 'baserev') from lib/Config.pm:574
=item 6
- in $=CODE(0x15eca4)() from /dev/null:0
- in $=CODE(0x182528)() from lib/Config.pm:2
- Package lib/Exporter.pm.
- out $=CODE(0x182528)() from lib/Config.pm:0
- scalar context return from CODE(0x182528): undef
- Package lib/Config.pm.
- in $=Config::TIEHASH('Config') from lib/Config.pm:628
- out $=Config::TIEHASH('Config') from lib/Config.pm:628
- scalar context return from Config::TIEHASH: empty hash
- in $=Exporter::import('Config', 'myconfig', 'config_vars') from /dev/null:0
- in $=Exporter::export('Config', 'main', 'myconfig', 'config_vars') from lib/Exporter.pm:171
- out $=Exporter::export('Config', 'main', 'myconfig', 'config_vars') from lib/Exporter.pm:171
- scalar context return from Exporter::export: ''
- out $=Exporter::import('Config', 'myconfig', 'config_vars') from /dev/null:0
- scalar context return from Exporter::import: ''
+ in $=CODE(0x15eca4)() from /dev/null:0
+ in $=CODE(0x182528)() from lib/Config.pm:2
+ Package lib/Exporter.pm.
+ out $=CODE(0x182528)() from lib/Config.pm:0
+ scalar context return from CODE(0x182528): undef
+ Package lib/Config.pm.
+ in $=Config::TIEHASH('Config') from lib/Config.pm:628
+ out $=Config::TIEHASH('Config') from lib/Config.pm:628
+ scalar context return from Config::TIEHASH: empty hash
+ in $=Exporter::import('Config', 'myconfig', 'config_vars') from /dev/null:0
+ in $=Exporter::export('Config', 'main', 'myconfig', 'config_vars') from lib/Exporter.pm:171
+ out $=Exporter::export('Config', 'main', 'myconfig', 'config_vars') from lib/Exporter.pm:171
+ scalar context return from Exporter::export: ''
+ out $=Exporter::import('Config', 'myconfig', 'config_vars') from /dev/null:0
+ scalar context return from Exporter::import: ''
=back
=item C<anchored(TYPE)>
If the pattern may match only at a handful of places, with C<TYPE>
-being C<BOL>, C<MBOL>, or C<GPOS>. See the table below.
+being C<SBOL>, C<MBOL>, or C<GPOS>. See the table below.
=back
=head2 Types of Nodes
-Here are the possible types, with short descriptions:
+Here are the current possible types, with short descriptions:
=for comment
This table is generated by regen/regcomp.pl. Any changes made here
END no End of program.
SUCCEED no Return from a subroutine, basically.
- # Anchors:
-
- BOL no Match "" at beginning of line.
- MBOL no Same, assuming multiline.
- SBOL no Same, assuming singleline.
- EOS no Match "" at end of string.
- EOL no Match "" at end of line.
- MEOL no Same, assuming multiline.
- SEOL no Same, assuming singleline.
- BOUND no Match "" at any word boundary using native
- charset semantics for non-utf8
- BOUNDL no Match "" at any locale word boundary
- BOUNDU no Match "" at any word boundary using Unicode
- semantics
- BOUNDA no Match "" at any word boundary using ASCII
- semantics
- NBOUND no Match "" at any word non-boundary using
- native charset semantics for non-utf8
- NBOUNDL no Match "" at any locale word non-boundary
- NBOUNDU no Match "" at any word non-boundary using
- Unicode semantics
- NBOUNDA no Match "" at any word non-boundary using
- ASCII semantics
+ # Line Start Anchors:
+ SBOL no Match "" at beginning of line: /^/, /\A/
+ MBOL no Same, assuming multiline: /^/m
+
+ # Line End Anchors:
+ SEOL no Match "" at end of line: /$/
+ MEOL no Same, assuming multiline: /$/m
+ EOS no Match "" at end of string: /\z/
+
+ # Match Start Anchors:
GPOS no Matches where last m//g left off.
- # [Special] alternatives:
+ # Word Boundary Opcodes:
+ BOUND no Like BOUNDA for non-utf8, otherwise match ""
+ between any Unicode \w\W or \W\w
+ BOUNDL no Like BOUND/BOUNDU, but \w and \W are defined
+ by current locale
+ BOUNDU no Match "" at any boundary of a given type
+ using Unicode rules
+ BOUNDA no Match "" at any boundary between \w\W or
+ \W\w, where \w is [_a-zA-Z0-9]
+ NBOUND no Like NBOUNDA for non-utf8, otherwise match
+ "" between any Unicode \w\w or \W\W
+ NBOUNDL no Like NBOUND/NBOUNDU, but \w and \W are
+ defined by current locale
+ NBOUNDU no Match "" at any non-boundary of a given type
+ using using Unicode rules
+ NBOUNDA no Match "" betweeen any \w\w or \W\W, where \w
+ is [_a-zA-Z0-9]
+ # [Special] alternatives:
REG_ANY no Match any one character (except newline).
SANY no Match any one character.
- CANY no Match any one byte.
- ANYOF sv Match character in (or not in) this class,
+ ANYOF sv 1 Match character in (or not in) this class,
single char match only
+ ANYOFD sv 1 Like ANYOF, but /d is in effect
+ ANYOFL sv 1 Like ANYOF, but /l is in effect
+ # POSIX Character Classes:
POSIXD none Some [[:class:]] under /d; the FLAGS field
gives which one
POSIXL none Some [[:class:]] under /l; the FLAGS field
#
BRANCH node Match this alternative, or the next...
- # Back pointer
-
- # BACK Normal "next" pointers all implicitly point forward;
- # BACK exists to make loop structures possible.
- # not used
- BACK no Match "", "next" ptr points backward.
-
# Literals
EXACT str Match this string (preceded by length).
+ EXACTL str Like EXACT, but /l is in effect (used so
+ locale-related warnings can be checked for).
EXACTF str Match this non-UTF-8 string (not guaranteed
to be folded) using /id rules (w/len).
EXACTFL str Match this string (not guaranteed to be
UTF-8) using /iu rules (w/len).
EXACTFA str Match this string (not guaranteed to be
folded) using /iaa rules (w/len).
+
EXACTFU_SS str Match this string (folded iff in UTF-8,
length in folding may change even if not in
UTF-8) using /iu rules (w/len).
+ EXACTFLU8 str Rare cirucmstances: like EXACTFU, but is
+ under /l, UTF-8, folded, and everything in
+ it is above 255.
EXACTFA_NO_TRIE str Match this string (which is not trie-able;
not guaranteed to be folded) using /iaa
rules (w/len).
# Loops
# STAR,PLUS '?', and complex '*' and '+', are implemented as
- # circular BRANCH structures using BACK. Simple cases
+ # circular BRANCH structures. Simple cases
# (one character per match) are implemented with STAR
# and PLUS for speed and to minimize recursive plunges.
#
# OPEN,CLOSE,GROUPP ...are numbered at compile time.
OPEN num 1 Mark this point in input as start of #n.
- CLOSE num 1 Analogous to OPEN.
+ CLOSE num 1 Close corresponding OPEN of #n.
+ SROPEN none Same as OPEN, but for script run
+ SRCLOSE none Close preceding SROPEN
REF num 1 Match some already matched string
REFF num 1 Match already matched string, folded using
- native charset semantics for non-utf8
+ native charset rules for non-utf8
REFFL num 1 Match already matched string, folded in loc.
REFFU num 1 Match already matched string, folded using
- unicode semantics for non-utf8
+ unicode rules for non-utf8
REFFA num 1 Match already matched string, folded using
- unicode semantics for non-utf8, no mixing
- ASCII, non-ASCII
+ unicode rules for non-utf8, no mixing ASCII,
+ non-ASCII
# Named references. Code in regcomp.c assumes that these all are after
# the numbered references
NREF no-sv 1 Match some already matched string
NREFF no-sv 1 Match already matched string, folded using
- native charset semantics for non-utf8
+ native charset rules for non-utf8
NREFFL no-sv 1 Match already matched string, folded in loc.
NREFFU num 1 Match already matched string, folded using
- unicode semantics for non-utf8
+ unicode rules for non-utf8
NREFFA num 1 Match already matched string, folded using
- unicode semantics for non-utf8, no mixing
- ASCII, non-ASCII
+ unicode rules for non-utf8, no mixing ASCII,
+ non-ASCII
+
+ # Support for long RE
+ LONGJMP off 1 1 Jump far away.
+ BRANCHJ off 1 1 BRANCH with long offset.
+ # Special Case Regops
IFMATCH off 1 2 Succeeds if the following matches.
UNLESSM off 1 2 Fails if the following matches.
SUSPEND off 1 1 "Independent" sub-RE.
IFTHEN off 1 1 Switch, should be preceded by switcher.
GROUPP num 1 Whether the group matched.
- # Support for long RE
-
- LONGJMP off 1 1 Jump far away.
- BRANCHJ off 1 1 BRANCH with long offset.
-
# The heavy worker
- EVAL evl 1 Execute some Perl code.
+ EVAL evl/flags Execute some Perl code.
+ 2L
# Modifiers
# Regex Subroutines
GOSUB num/ofs 2L recurse to paren arg1 at (signed) ofs arg2
- GOSTART no recurse to start of pattern
# Special conditionals
NGROUPP no-sv 1 Whether the group matched.
# Backtracking Verbs
ENDLIKE none Used only for the type field of verbs
- OPFAIL none Same as (?!)
- ACCEPT parno 1 Accepts the current matched string.
+ OPFAIL no-sv 1 Same as (?!), but with verb arg
+ ACCEPT no-sv/num Accepts the current matched string, with
+ 2L verbar
# Verbs With Arguments
VERB no-sv 1 Used only for the type field of verbs
$ENV{PERL_DEBUG_MSTATS} >= 1 >>. The report format is similar to
the following example:
- $ PERL_DEBUG_MSTATS=2 perl -e "require Carp"
- Memory allocation statistics after compilation: (buckets 4(4)..8188(8192)
- 14216 free: 130 117 28 7 9 0 2 2 1 0 0
+ $ PERL_DEBUG_MSTATS=2 perl -e "require Carp"
+ Memory allocation statistics after compilation: (buckets 4(4)..8188(8192)
+ 14216 free: 130 117 28 7 9 0 2 2 1 0 0
437 61 36 0 5
- 60924 used: 125 137 161 55 7 8 6 16 2 0 1
+ 60924 used: 125 137 161 55 7 8 6 16 2 0 1
74 109 304 84 20
- Total sbrk(): 77824/21:119. Odd ends: pad+heads+chain+tail: 0+636+0+2048.
- Memory allocation statistics after execution: (buckets 4(4)..8188(8192)
- 30888 free: 245 78 85 13 6 2 1 3 2 0 1
+ Total sbrk(): 77824/21:119. Odd ends: pad+heads+chain+tail: 0+636+0+2048.
+ Memory allocation statistics after execution: (buckets 4(4)..8188(8192)
+ 30888 free: 245 78 85 13 6 2 1 3 2 0 1
315 162 39 42 11
- 175816 used: 265 176 1112 111 26 22 11 27 2 1 1
+ 175816 used: 265 176 1112 111 26 22 11 27 2 1 1
196 178 1066 798 39
- Total sbrk(): 215040/47:145. Odd ends: pad+heads+chain+tail: 0+2192+0+6144.
+ Total sbrk(): 215040/47:145. Odd ends: pad+heads+chain+tail: 0+2192+0+6144.
It is possible to ask for such a statistic at arbitrary points in
your execution using the mstat() function out of the standard
For example, suppose under the previous example, the memory footprints
were
- free: 8 16 32 64 128 256 512 1024 2048 4096 8192
+ free: 8 16 32 64 128 256 512 1024 2048 4096 8192
4 12 24 48 80
With a non-C<DEBUGGING> perl, the buckets starting from C<128> have
https://perl5.git.perl.org / perl5.git / blobdiff