X-Git-Url: https://perl5.git.perl.org/perl5.git/blobdiff_plain/a3621e74372f5d2c10ed0d2a21195cab42a5be54..d1401ee92e9e5e7c3e719cc5c210862a444379d1:/regcomp.sym diff --git a/regcomp.sym b/regcomp.sym index 1bcdecb..b0b9faf 100644 --- a/regcomp.sym +++ b/regcomp.sym @@ -1,13 +1,28 @@ -# Format: +# regcomp.sym +# +# File has two sections, divided by a line of dashes '-'. +# +# Empty rows after #-comment are removed from input are ignored +# +# First section is for regops, second sectionis for regmatch-states +# +# Note that the order in this file is important. +# +# Format for first section: # NAME \t TYPE, arg-description [num-args] [longjump-len] \t DESCRIPTION +# +# +# run perl regen.pl after editing this file + -# Empty rows and #-comment rows are ignored. -# Exit points +#* Exit points (0,1) + END END, no End of program. SUCCEED END, no Return from a subroutine, basically. -# Anchors: +#* Anchors: (2..13) + BOL BOL, no Match "" at beginning of line. MBOL BOL, no Same, assuming multiline. SBOL BOL, no Same, assuming singleline. @@ -21,7 +36,8 @@ 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 +#* [Special] alternatives: (14..30) + 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. @@ -40,7 +56,9 @@ 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 +#* Alternation (31) + +# 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 @@ -50,26 +68,27 @@ CLUMP CLUMP, no Match any combining character sequence # BRANCH BRANCH, node Match this alternative, or the next... +#*Back pointer (32) + # 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). +#*Literals (33..35) -# Trie Related (behave the same as A|LIST|OF|WORDS would) -TRIE TRIE, trie 1 Match one or more of many EXACT strings -TRIEF TRIE, trie 1 Match one or more of many EXACTF strings -TRIEFL TRIE, trie 1 Match one or more of many EXACTFL strings +EXACT EXACT, str Match this string (preceded by length). +EXACTF EXACT, str Match this string, folded (prec. by length). +EXACTFL EXACT, str Match this string, folded in locale (w/len). + +#*Do nothing types (36..37) -# 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. +#*Loops (38..44) + # 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 @@ -79,14 +98,15 @@ 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. +CURLYN CURLY, no 2 Capture next-after-this simple thing +CURLYM CURLY, no 2 Capture 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. +#*Buffer related (45..49) + # 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. @@ -95,27 +115,122 @@ 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 +#*Grouping assertions (50..54) + 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 +#*Support for long RE (55..56) + LONGJMP LONGJMP,off 1 1 Jump far away. BRANCHJ BRANCHJ,off 1 1 BRANCH with long offset. -# The heavy worker +#*The heavy worker (57..58) + EVAL EVAL, evl 1 Execute some Perl code. -# Modifiers +#*Modifiers (59..60) + MINMOD MINMOD, no Next operator is not greedy. LOGICAL LOGICAL,no Next opcode should set the flag only. -# This is not used yet +# This is not used yet (61) RENUM BRANCHJ,off 1 1 Group with independently numbered parens. +#*Trie Related (62..64) + +# 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 signifigant + +TRIE TRIE, trie 1 Match many EXACT(FL?)? at once. flags==type +TRIEC TRIE,trie charclass Same as TRIE, but with embedded charclass data + +# For start classes, contains an added fail table. +AHOCORASICK TRIE, trie 1 Aho Corasick stclass. flags==type +AHOCORASICKC TRIE,trie charclass Same as AHOCORASICK, but with embedded charclass data + +#*Regex Subroutines (65..66) +GOSUB GOSUB, num/ofs 2L recurse to paren arg1 at (signed) ofs arg2 +GOSTART GOSTART, no recurse to start of pattern + +#*Named references (67..69) +NREF REF, no-sv 1 Match some already matched string +NREFF REF, no-sv 1 Match already matched string, folded +NREFFL REF, no-sv 1 Match already matched string, folded in loc. + + +#*Special conditionals (70..72) +NGROUPP NGROUPP, no-sv 1 Whether the group matched. +INSUBP INSUBP, num 1 Whether we are in a specific recurse. +DEFINEP DEFINEP, none 1 Never execute directly. + +#*Bactracking Verbs +ENDLIKE ENDLIKE, none Used only for the type field of verbs +OPFAIL ENDLIKE, none Same as (?!) +ACCEPT ENDLIKE, parno 1 Accepts the current matched string. + + +#*Verbs With Arguments +VERB VERB, no-sv 1 Used only for the type field of verbs +PRUNE VERB, no-sv 1 Pattern fails at this startpoint if no-backtracking through this +MARKPOINT VERB, no-sv 1 Push the current location for rollback by cut. +SKIP VERB, no-sv 1 On failure skip forward (to the mark) before retrying +COMMIT VERB, no-sv 1 Pattern fails outright if backtracking through this +CUTGROUP VERB, no-sv 1 On failure go to the next alternation in the group + +#*Control what to keep in $&. +KEEPS KEEPS, no $& begins here. + +#*New charclass like patterns +LNBREAK LNBREAK, none generic newline pattern +VERTWS VERTWS, none vertical whitespace (Perl 6) +NVERTWS NVERTWS, none not vertical whitespace (Perl 6) +HORIZWS HORIZWS, none horizontal whitespace (Perl 6) +NHORIZWS NHORIZWS, none not horizontal whitespace (Perl 6) + +FOLDCHAR FOLDCHAR, codepoint 1 codepoint with tricky case folding properties. + +# NEW STUFF ABOVE THIS LINE + +################################################################################ + +#*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 NOTHING,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 PSEUDO,off Pseudo opcode for internal use. + +------------------------------------------------------------------------------- +# Format for second section: +# REGOP \t typelist [ \t typelist] [# Comment] +# typelist= namelist +# = namelist:FAIL +# = name:count + +# Anything below is a state +# +# +TRIE next:FAIL +EVAL AB:FAIL +CURLYX end:FAIL +WHILEM A_pre,A_min,A_max,B_min,B_max:FAIL +BRANCH next:FAIL +CURLYM A,B:FAIL +IFMATCH A:FAIL +CURLY B_min_known,B_min,B_max:FAIL +COMMIT next:FAIL +MARKPOINT next:FAIL +SKIP next:FAIL +CUTGROUP next:FAIL +KEEPS next:FAIL