file compiled by Perl. The same is also true for C<eval>ed strings
that contain subroutines, or which are currently being executed.
The $filename for C<eval>ed strings looks like C<(eval 34)>.
-Code assertions in regexes look like C<(re_eval 19)>.
Values in this array are magical in numeric context: they compare
equal to zero only if the line is not breakable.
The same holds for evaluated strings that contain subroutines, or
which are currently being executed. The $filename for C<eval>ed strings
-looks like C<(eval 34)> or C<(re_eval 19)>.
+looks like C<(eval 34)>.
=item *
Each scalar C<${"_<$filename"}> contains C<"_<$filename">. This is
also the case for evaluated strings that contain subroutines, or
which are currently being executed. The $filename for C<eval>ed
-strings looks like C<(eval 34)> or C<(re_eval 19)>.
+strings looks like C<(eval 34)>.
=item *
A hash C<%DB::sub> is maintained, whose keys are subroutine names
and whose values have the form C<filename:startline-endline>.
C<filename> has the form C<(eval 34)> for subroutines defined inside
-C<eval>s, or C<(re_eval 19)> for those within regex code assertions.
+C<eval>s.
=item *
Here are the possible types, with short descriptions:
+=for comment
+This table is generated by regen/regcomp.pl. Any changes made here
+will be lost.
+
+=for regcomp.pl begin
+
# TYPE arg-description [num-args] [longjump-len] DESCRIPTION
# Exit points
- END no End of program.
- SUCCEED no Return from a subroutine, basically.
+
+ 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
- GPOS no Matches where last m//g left off.
+ 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
+ GPOS no Matches where last m//g left off.
# [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, single char
- match only
- ANYOFV sv Match character in (or not in) this class, can
- match-multiple chars
- ALNUM no Match any alphanumeric character using native charset
- semantics for non-utf8
- ALNUML no Match any alphanumeric char in locale
- ALNUMU no Match any alphanumeric char using Unicode semantics
- ALNUMA no Match [A-Za-z_0-9]
- NALNUM no Match any non-alphanumeric character using native charset
- semantics for non-utf8
- NALNUML no Match any non-alphanumeric char in locale
- NALNUMU no Match any non-alphanumeric char using Unicode semantics
- NALNUMA no Match [^A-Za-z_0-9]
- SPACE no Match any whitespace character using native charset
- semantics for non-utf8
- SPACEL no Match any whitespace char in locale
- SPACEU no Match any whitespace char using Unicode semantics
- SPACEA no Match [ \t\n\f\r]
- NSPACE no Match any non-whitespace character using native charset
- semantics for non-utf8
- NSPACEL no Match any non-whitespace char in locale
- NSPACEU no Match any non-whitespace char using Unicode semantics
- NSPACEA no Match [^ \t\n\f\r]
- DIGIT no Match any numeric character using native charset semantics
- for non-utf8
- DIGITL no Match any numeric character in locale
- DIGITA no Match [0-9]
- NDIGIT no Match any non-numeric character using native charset
- i semantics for non-utf8
- NDIGITL no Match any non-numeric character in locale
- NDIGITA no Match [^0-9]
- CLUMP no Match any extended grapheme cluster sequence
+ 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, single char match only
+ ANYOF_WARN_SUPER sv Match character in (or not in) this
+ class, warn (if enabled) upon matching a
+ char above Unicode max;
+ ANYOF_SYNTHETIC sv Synthetic start class
+
+ POSIXD none Some [[:class:]] under /d; the FLAGS
+ field gives which one
+ POSIXL none Some [[:class:]] under /l; the FLAGS
+ field gives which one
+ POSIXU none Some [[:class:]] under /u; the FLAGS
+ field gives which one
+ POSIXA none Some [[:class:]] under /a; the FLAGS
+ field gives which one
+ NPOSIXD none complement of POSIXD, [[:^class:]]
+ NPOSIXL none complement of POSIXL, [[:^class:]]
+ NPOSIXU none complement of POSIXU, [[:^class:]]
+ NPOSIXA none complement of POSIXA, [[:^class:]]
+
+ CLUMP no Match any extended grapheme cluster
+ sequence
# Alternation
- # BRANCH The set of branches constituting a single choice are hooked
- # together with their "next" pointers, since precedence prevents
- # anything being concatenated to any individual branch. The
- # "next" pointer of the last BRANCH in a choice points to the
- # thing following the whole choice. This is also where the
- # final "next" pointer of each individual branch points; each
- # branch starts with the operand node of a BRANCH node.
+ # BRANCH The set of branches constituting a single choice are
+ # hooked together with their "next" pointers, since
+ # precedence prevents anything being concatenated to
+ # any individual branch. The "next" pointer of the last
+ # BRANCH in a choice points to the thing following the
+ # whole choice. This is also where the final "next"
+ # pointer of each individual branch points; each branch
+ # starts with the operand node of a BRANCH node.
#
- BRANCH node Match this alternative, or the next...
+ 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.
+ # BACK Normal "next" pointers all implicitly point forward;
+ # BACK exists to make loop structures possible.
# not used
- BACK no Match "", "next" ptr points backward.
+ BACK no Match "", "next" ptr points backward.
# Literals
- EXACT str Match this string (preceded by length).
- EXACTF str Match this string, folded, native charset semantics for
- non-utf8 (prec. by length).
- EXACTFL str Match this string, folded in locale (w/len).
- EXACTFU str Match this string, folded, Unicode semantics for non-utf8
- (prec. by length).
- EXACTFA str Match this string, folded, Unicode semantics for non-utf8,
- but no ASCII-range character matches outside ASCII (prec.
- by length),.
+ EXACT str Match this string (preceded by length).
+ 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
+ folded) using /il rules (w/len).
+ EXACTFU str Match this string (folded iff in UTF-8,
+ length in folding doesn't change if not
+ in 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).
+ EXACTFU_TRICKYFOLD str Match this folded UTF-8 string using /iu
+ rules
# Do nothing types
- NOTHING no Match empty string.
+ NOTHING no Match empty string.
# A variant of above which delimits a group, thus stops optimizations
- TAIL no Match empty string. Can jump here from outside.
+ TAIL no Match empty string. Can jump here from
+ outside.
# Loops
- # STAR,PLUS '?', and complex '*' and '+', are implemented as circular
- # BRANCH structures using BACK. Simple cases (one character
- # per match) are implemented with STAR and PLUS for speed
- # and to minimize recursive plunges.
+ # STAR,PLUS '?', and complex '*' and '+', are implemented as
+ # circular BRANCH structures using BACK. Simple cases
+ # (one character per match) are implemented with STAR
+ # and PLUS for speed and to minimize recursive plunges.
#
- STAR node Match this (simple) thing 0 or more times.
- PLUS node Match this (simple) thing 1 or more times.
+ STAR node Match this (simple) thing 0 or more
+ times.
+ PLUS node Match this (simple) thing 1 or more
+ times.
- CURLY sv 2 Match this simple thing {n,m} times.
- CURLYN no 2 Capture next-after-this simple thing
- CURLYM no 2 Capture this medium-complex thing {n,m} times.
- CURLYX sv 2 Match this complex thing {n,m} times.
+ CURLY sv 2 Match this simple thing {n,m} times.
+ CURLYN no 2 Capture next-after-this simple thing
+ CURLYM no 2 Capture this medium-complex thing {n,m}
+ times.
+ CURLYX sv 2 Match this complex thing {n,m} times.
# This terminator creates a loop structure for CURLYX
- WHILEM no Do curly processing and see if rest matches.
+ WHILEM no Do curly processing and see if rest
+ matches.
# Buffer related
# 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.
-
- REF num 1 Match some already matched string
- REFF num 1 Match already matched string, folded using native charset
- semantics 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
- REFFA num 1 Match already matched string, folded using unicode
- semantics 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
- 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
- NREFFA num 1 Match already matched string, folded using unicode
- semantics for non-utf8, no mixing ASCII, non-ASCII
-
- 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.
+ OPEN num 1 Mark this point in input as start of #n.
+ CLOSE num 1 Analogous to OPEN.
+
+ REF num 1 Match some already matched string
+ REFF num 1 Match already matched string, folded
+ using native charset semantics 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
+ REFFA num 1 Match already matched string, folded
+ using unicode semantics 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
+ 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
+ NREFFA num 1 Match already matched string, folded
+ using unicode semantics for non-utf8, no
+ mixing ASCII, non-ASCII
+
+ 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.
+ 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 1 Execute some Perl code.
# Modifiers
- MINMOD no Next operator is not greedy.
- LOGICAL no Next opcode should set the flag only.
+ MINMOD no Next operator is not greedy.
+ LOGICAL no Next opcode should set the flag only.
# This is not used yet
- RENUM off 1 1 Group with independently numbered parens.
+ RENUM off 1 1 Group with independently numbered parens.
# Trie Related
- # Behave the same as A|LIST|OF|WORDS would. The '..C' variants have
- # inline charclass data (ascii only), the 'C' store it in the structure.
- # NOTE: the relative order of the TRIE-like regops is significant
+ # Behave the same as A|LIST|OF|WORDS would. The '..C' variants
+ # have inline charclass data (ascii only), the 'C' store it in the
+ # structure.
- TRIE trie 1 Match many EXACT(F[ALU]?)? at once. flags==type
- TRIEC charclass Same as TRIE, but with embedded charclass data
+ TRIE trie 1 Match many EXACT(F[ALU]?)? at once.
+ flags==type
+ TRIEC trie Same as TRIE, but with embedded charclass
+ charclass data
- # For start classes, contains an added fail table.
- AHOCORASICK trie 1 Aho Corasick stclass. flags==type
- AHOCORASICKC charclass Same as AHOCORASICK, but with embedded charclass data
+ AHOCORASICK trie 1 Aho Corasick stclass. flags==type
+ AHOCORASICKC trie Same as AHOCORASICK, but with embedded
+ charclass charclass data
# Regex Subroutines
- GOSUB num/ofs 2L recurse to paren arg1 at (signed) ofs arg2
- GOSTART no recurse to start of pattern
+ 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.
- INSUBP num 1 Whether we are in a specific recurse.
- DEFINEP none 1 Never execute directly.
+ NGROUPP no-sv 1 Whether the group matched.
+ INSUBP num 1 Whether we are in a specific recurse.
+ DEFINEP none 1 Never execute directly.
# Backtracking Verbs
- ENDLIKE none Used only for the type field of verbs
- OPFAIL none Same as (?!)
- ACCEPT parno 1 Accepts the current matched string.
-
+ ENDLIKE none Used only for the type field of verbs
+ OPFAIL none Same as (?!)
+ ACCEPT parno 1 Accepts the current matched string.
# Verbs With Arguments
- VERB no-sv 1 Used only for the type field of verbs
- PRUNE no-sv 1 Pattern fails at this startpoint if no-backtracking through this
- MARKPOINT no-sv 1 Push the current location for rollback by cut.
- SKIP no-sv 1 On failure skip forward (to the mark) before retrying
- COMMIT no-sv 1 Pattern fails outright if backtracking through this
- CUTGROUP no-sv 1 On failure go to the next alternation in the group
+ VERB no-sv 1 Used only for the type field of verbs
+ PRUNE no-sv 1 Pattern fails at this startpoint if no-
+ backtracking through this
+ MARKPOINT no-sv 1 Push the current location for rollback by
+ cut.
+ SKIP no-sv 1 On failure skip forward (to the mark)
+ before retrying
+ COMMIT no-sv 1 Pattern fails outright if backtracking
+ through this
+ CUTGROUP no-sv 1 On failure go to the next alternation in
+ the group
# Control what to keep in $&.
- KEEPS no $& begins here.
+ KEEPS no $& begins here.
# New charclass like patterns
- LNBREAK none generic newline pattern
- VERTWS none vertical whitespace (Perl 6)
- NVERTWS none not vertical whitespace (Perl 6)
- HORIZWS none horizontal whitespace (Perl 6)
- NHORIZWS none not horizontal whitespace (Perl 6)
-
- FOLDCHAR codepoint 1 codepoint with tricky case folding properties.
+ LNBREAK none generic newline pattern
# SPECIAL REGOPS
- # This is not really a node, but an optimized away piece of a "long" node.
- # To simplify debugging output, we mark it as if it were a node
- OPTIMIZED off Placeholder for dump.
+ # This is not really a node, but an optimized away piece of a "long"
+ # node. To simplify debugging output, we mark it as if it were a node
+ OPTIMIZED off Placeholder for dump.
# Special opcode with the property that no opcode in a compiled program
# will ever be of this type. Thus it can be used as a flag value that
# no other opcode has been seen. END is used similarly, in that an END
- # node cant be optimized. So END implies "unoptimizable" and PSEUDO mean
- # "not seen anything to optimize yet".
- PSEUDO off Pseudo opcode for internal use.
+ # node cant be optimized. So END implies "unoptimizable" and PSEUDO
+ # mean "not seen anything to optimize yet".
+ PSEUDO off Pseudo opcode for internal use.
+
+=for regcomp.pl end
=for unprinted-credits
Next section M-J. Dominus (mjd-perl-patch+@plover.com) 20010421
https://perl5.git.perl.org / perl5.git / blobdiff