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tag: perl-5.9.1
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# Format:
# NAME \t TYPE, arg-description [num-args] [longjump-len] \t DESCRIPTION
# Empty rows and #-comment rows are ignored.
# Exit points
END END, no End of program.
SUCCEED END, no Return from a subroutine, basically.
# Anchors:
BOL BOL, no Match "" at beginning of line.
MBOL BOL, no Same, assuming multiline.
SBOL BOL, no Same, assuming singleline.
EOS EOL, no Match "" at end of string.
EOL EOL, no Match "" at end of line.
MEOL EOL, no Same, assuming multiline.
SEOL EOL, no Same, assuming singleline.
BOUND BOUND, no Match "" at any word boundary
BOUNDL BOUND, no Match "" at any word boundary
NBOUND NBOUND, no Match "" at any word non-boundary
NBOUNDL NBOUND, no Match "" at any word non-boundary
GPOS GPOS, no Matches where last m//g left off.
# [Special] alternatives
REG_ANY REG_ANY, no Match any one character (except newline).
SANY REG_ANY, no Match any one character.
CANY REG_ANY, no Match any one byte.
ANYOF ANYOF, sv Match character in (or not in) this class.
ALNUM ALNUM, no Match any alphanumeric character
ALNUML ALNUM, no Match any alphanumeric char in locale
NALNUM NALNUM, no Match any non-alphanumeric character
NALNUML NALNUM, no Match any non-alphanumeric char in locale
SPACE SPACE, no Match any whitespace character
SPACEL SPACE, no Match any whitespace char in locale
NSPACE NSPACE, no Match any non-whitespace character
NSPACEL NSPACE, no Match any non-whitespace char in locale
DIGIT DIGIT, no Match any numeric character
DIGITL DIGIT, no Match any numeric character in locale
NDIGIT NDIGIT, no Match any non-numeric character
NDIGITL NDIGIT, no Match any non-numeric character in locale
CLUMP CLUMP, no Match any combining character sequence
# 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 BRANCH, node Match this alternative, or the next...
# BACK Normal "next" pointers all implicitly point forward; BACK
# exists to make loop structures possible.
# not used
BACK BACK, no Match "", "next" ptr points backward.
# Literals
EXACT EXACT, sv Match this string (preceded by length).
EXACTF EXACT, sv Match this string, folded (prec. by length).
EXACTFL EXACT, sv Match this string, folded in locale (w/len).
# Do nothing
NOTHING NOTHING,no Match empty string.
# A variant of above which delimits a group, thus stops optimizations
TAIL NOTHING,no Match empty string. Can jump here from outside.
# 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 STAR, node Match this (simple) thing 0 or more times.
PLUS PLUS, node Match this (simple) thing 1 or more times.
CURLY CURLY, sv 2 Match this simple thing {n,m} times.
CURLYN CURLY, no 2 Match next-after-this simple thing
# {n,m} times, set parenths.
CURLYM CURLY, no 2 Match this medium-complex thing {n,m} times.
CURLYX CURLY, sv 2 Match this complex thing {n,m} times.
# This terminator creates a loop structure for CURLYX
WHILEM WHILEM, no Do curly processing and see if rest matches.
# OPEN,CLOSE,GROUPP ...are numbered at compile time.
OPEN OPEN, num 1 Mark this point in input as start of #n.
CLOSE CLOSE, num 1 Analogous to OPEN.
REF REF, num 1 Match some already matched string
REFF REF, num 1 Match already matched string, folded
REFFL REF, num 1 Match already matched string, folded in loc.
# grouping assertions
IFMATCH BRANCHJ,off 1 2 Succeeds if the following matches.
UNLESSM BRANCHJ,off 1 2 Fails if the following matches.
SUSPEND BRANCHJ,off 1 1 "Independent" sub-RE.
IFTHEN BRANCHJ,off 1 1 Switch, should be preceeded by switcher .
GROUPP GROUPP, num 1 Whether the group matched.
# Support for long RE
LONGJMP LONGJMP,off 1 1 Jump far away.
BRANCHJ BRANCHJ,off 1 1 BRANCH with long offset.
# The heavy worker
EVAL EVAL, evl 1 Execute some Perl code.
# Modifiers
MINMOD MINMOD, no Next operator is not greedy.
LOGICAL LOGICAL,no Next opcode should set the flag only.
# This is not used yet
RENUM BRANCHJ,off 1 1 Group with independently numbered parens.
# 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 NOTHING,off Placeholder for dump.
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