X-Git-Url: https://perl5.git.perl.org/perl5.git/blobdiff_plain/f9ef50a71935a8e93b4030c12dcd1206ccab71ab..08b2a930f16c631ad58d4ec6d184e81c0a4ec7b6:/regcomp.sym diff --git a/regcomp.sym b/regcomp.sym index ac1c2e0..e8400b9 100644 --- a/regcomp.sym +++ b/regcomp.sym @@ -4,24 +4,26 @@ # # Empty rows after #-comment are removed from input are ignored # -# First section is for regops, second sectionis for regmatch-states +# First section is for regops, second section is for regmatch-states # # Note that the order in this file is important. # # Format for first section: -# NAME \s+ TYPE, arg-description [flags] [num-args] [longjump-len] ; DESCRIPTION +# NAME \s+ TYPE, arg-description [num-args] [flags] [longjump-len] ; DESCRIPTION +# flag means is REGNODE_SIMPLE; flag means is REGNODE_VARIES # # # run perl regen.pl after editing this file +# Also update perlredebguts.pod -#* Exit points (0,1) +#* Exit points END END, no ; End of program. SUCCEED END, no ; Return from a subroutine, basically. -#* Anchors: (2..13) +#* Anchors: BOL BOL, no ; Match "" at beginning of line. MBOL BOL, no ; Same, assuming multiline. @@ -30,33 +32,73 @@ 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 +# The regops that have varieties that vary depending on the character set regex +# modifiers have to ordered thusly: /d, /l, /u, /a, /aa. This is because code +# in regcomp.c uses the enum value of the modifier as an offset from the /d +# version. The complements must come after the non-complements. +# BOUND, ALNUM, SPACE, DIGIT, and their complements are affected, as well as +# EXACTF. +BOUND BOUND, no ; Match "" at any word boundary using native charset semantics for non-utf8 +BOUNDL BOUND, no ; Match "" at any locale word boundary +BOUNDU BOUND, no ; Match "" at any word boundary using Unicode semantics +BOUNDA BOUND, no ; Match "" at any word boundary using ASCII semantics +# All NBOUND nodes are required by code in regexec.c to be greater than all BOUND ones +NBOUND NBOUND, no ; Match "" at any word non-boundary using native charset semantics for non-utf8 +NBOUNDL NBOUND, no ; Match "" at any locale word non-boundary +NBOUNDU NBOUND, no ; Match "" at any word non-boundary using Unicode semantics +NBOUNDA NBOUND, no ; Match "" at any word non-boundary using ASCII semantics GPOS GPOS, no ; Matches where last m//g left off. -#* [Special] alternatives: (14..30) +#* [Special] alternatives: REG_ANY REG_ANY, no 0 S ; Match any one character (except newline). SANY REG_ANY, no 0 S ; Match any one character. CANY REG_ANY, no 0 S ; Match any one byte. -ANYOF ANYOF, sv 0 S ; Match character in (or not in) this class. -ALNUM ALNUM, no 0 S ; Match any alphanumeric character +ANYOF ANYOF, sv 0 S ; Match character in (or not in) this class, single char match only +ANYOFV ANYOF, sv 0 V ; Match character in (or not in) this class, can match-multiple chars + +# Order (within each group) of the below is important. See ordering comment +# above. The PLACEHOLDERn ones are wasting a value. Right now, we have plenty +# to spare, but these would be obvious candidates if ever we ran out of node +# types in a U8. +ALNUM ALNUM, no 0 S ; Match any alphanumeric character using native charset semantics for non-utf8 ALNUML ALNUM, no 0 S ; Match any alphanumeric char in locale -NALNUM NALNUM, no 0 S ; Match any non-alphanumeric character +ALNUMU ALNUM, no 0 S ; Match any alphanumeric char using Unicode semantics +ALNUMA ALNUM, no 0 S ; Match [A-Za-z_0-9] +NALNUM NALNUM, no 0 S ; Match any non-alphanumeric character using native charset semantics for non-utf8 NALNUML NALNUM, no 0 S ; Match any non-alphanumeric char in locale -SPACE SPACE, no 0 S ; Match any whitespace character +NALNUMU NALNUM, no 0 S ; Match any non-alphanumeric char using Unicode semantics +NALNUMA NALNUM, no 0 S ; Match [^A-Za-z_0-9] +SPACE SPACE, no 0 S ; Match any whitespace character using native charset semantics for non-utf8 SPACEL SPACE, no 0 S ; Match any whitespace char in locale -NSPACE NSPACE, no 0 S ; Match any non-whitespace character +SPACEU SPACE, no 0 S ; Match any whitespace char using Unicode semantics +SPACEA SPACE, no 0 S ; Match [ \t\n\f\r] +NSPACE NSPACE, no 0 S ; Match any non-whitespace character using native charset semantics for non-utf8 NSPACEL NSPACE, no 0 S ; Match any non-whitespace char in locale -DIGIT DIGIT, no 0 S ; Match any numeric character -DIGITL DIGIT, no ; Match any numeric character in locale -NDIGIT NDIGIT, no 0 S ; Match any non-numeric character -NDIGITL NDIGIT, no ; Match any non-numeric character in locale -CLUMP CLUMP, no 0 V ; Match any combining character sequence - -#* Alternation (31) +NSPACEU NSPACE, no 0 S ; Match any non-whitespace char using Unicode semantics +NSPACEA NSPACE, no 0 S ; Match [^ \t\n\f\r] +DIGIT DIGIT, no 0 S ; Match any numeric character using native charset semantics for non-utf8 +DIGITL DIGIT, no 0 S ; Match any numeric character in locale +PLACEHOLDER1 NOTHING, no ; placeholder for missing DIGITU +DIGITA DIGIT, no 0 S ; Match [0-9] +NDIGIT NDIGIT, no 0 S ; Match any non-numeric character using native charset semantics for non-utf8 +NDIGITL NDIGIT, no 0 S ; Match any non-numeric character in locale +PLACEHOLDER2 NOTHING, no ; placeholder for missing NDIGITU +NDIGITA NDIGIT, no 0 S ; Match [^0-9] + +POSIXD POSIXD, none 0 S ; currently unused except as a placeholder +POSIXL POSIXD, none 0 S ; currently unused except as a placeholder +POSIXU POSIXD, none 0 S ; currently unused except as a placeholder +POSIXA POSIXD, none 0 S ; Some [[:class:]] under /a; the FLAGS field gives which one +NPOSIXD POSIXD, none 0 S ; currently unused except as a placeholder +NPOSIXL POSIXD, none 0 S ; currently unused except as a placeholder +NPOSIXU POSIXD, none 0 S ; currently unused except as a placeholder +NPOSIXA POSIXD, none 0 S ; complement of POSIXA, [[:^class:]] +# End of order is important (within groups) + +CLUMP CLUMP, no 0 V ; 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 @@ -68,26 +110,30 @@ CLUMP CLUMP, no 0 V ; Match any combining character sequence # BRANCH BRANCH, node 0 V ; Match this alternative, or the next... -#*Back pointer (32) +#*Back pointer # BACK Normal "next" pointers all implicitly point forward; BACK # exists to make loop structures possible. # not used BACK BACK, no 0 V ; Match "", "next" ptr points backward. -#*Literals (33..35) +#*Literals - NOTE the relative ordering of these types is important do not change it 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). +EXACTF EXACT, str ; Match this non-UTF-8 string (not guaranteed to be folded) using /id rules (w/len). +EXACTFL EXACT, str ; Match this string (not guaranteed to be folded) using /il rules (w/len). +EXACTFU EXACT, 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 EXACT, str ; Match this string (not guaranteed to be folded) using /iaa rules (w/len). +EXACTFU_SS EXACT, 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 EXACT, str ; Match this folded UTF-8 string using /iu rules -#*Do nothing types (36..37) +#*Do nothing types 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) +#*Loops # STAR,PLUS '?', and complex '*' and '+', are implemented as circular # BRANCH structures using BACK. Simple cases (one character @@ -105,69 +151,74 @@ CURLYX CURLY, sv 2 V ; Match this complex thing {n,m} times. # This terminator creates a loop structure for CURLYX WHILEM WHILEM, no 0 V ; Do curly processing and see if rest matches. -#*Buffer related (45..49) +#*Buffer related # 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 V ; Match some already matched string -REFF REF, num 1 V ; Match already matched string, folded +REFF REF, num 1 V ; Match already matched string, folded using native charset semantics for non-utf8 REFFL REF, num 1 V ; Match already matched string, folded in loc. +# N?REFF[AU] could have been implemented using the FLAGS field of the +# regnode, but by having a separate node type, we can use the existing switch +# statement to avoid some tests +REFFU REF, num 1 V ; Match already matched string, folded using unicode semantics for non-utf8 +REFFA REF, num 1 V ; 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 REF, no-sv 1 V ; Match some already matched string +NREFF REF, no-sv 1 V ; Match already matched string, folded using native charset semantics for non-utf8 +NREFFL REF, no-sv 1 V ; Match already matched string, folded in loc. +NREFFU REF, num 1 V ; Match already matched string, folded using unicode semantics for non-utf8 +NREFFA REF, num 1 V ; Match already matched string, folded using unicode semantics for non-utf8, no mixing ASCII, non-ASCII IFMATCH BRANCHJ, off 1 . 2 ; Succeeds if the following matches. UNLESSM BRANCHJ, off 1 . 2 ; Fails if the following matches. SUSPEND BRANCHJ, off 1 V 1 ; "Independent" sub-RE. -IFTHEN BRANCHJ, off 1 V 1 ; Switch, should be preceeded by switcher . +IFTHEN BRANCHJ, off 1 V 1 ; Switch, should be preceded by switcher . GROUPP GROUPP, num 1 ; Whether the group matched. -#*Support for long RE (55..56) +#*Support for long RE LONGJMP LONGJMP, off 1 . 1 ; Jump far away. BRANCHJ BRANCHJ, off 1 V 1 ; BRANCH with long offset. -#*The heavy worker (57) +#*The heavy worker EVAL EVAL, evl 1 ; Execute some Perl code. -#*Modifiers (58..59) +#*Modifiers MINMOD MINMOD, no ; Next operator is not greedy. LOGICAL LOGICAL, no ; Next opcode should set the flag only. -# This is not used yet (60) +# This is not used yet RENUM BRANCHJ, off 1 . 1 ; Group with independently numbered parens. -#*Trie Related (61..62) +#*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 signifigant +# NOTE: the relative order of the TRIE-like regops is significant -TRIE TRIE, trie 1 ; Match many EXACT(FL?)? at once. flags==type +TRIE TRIE, trie 1 ; Match many EXACT(F[ALU]?)? 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) +#*Regex Subroutines 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 V ; Match some already matched string -NREFF REF, no-sv 1 V ; Match already matched string, folded -NREFFL REF, no-sv 1 V ; Match already matched string, folded in loc. - - -#*Special conditionals (70..72) +#*Special conditionals 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 +#*Backtracking 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. @@ -186,14 +237,15 @@ KEEPS KEEPS, no ; $& begins here. #*New charclass like patterns LNBREAK LNBREAK, none ; generic newline pattern + +# regcomp.c expects the node number of the complement to be one greater than +# the non-complement VERTWS VERTWS, none 0 S ; vertical whitespace (Perl 6) NVERTWS NVERTWS, none 0 S ; not vertical whitespace (Perl 6) HORIZWS HORIZWS, none 0 S ; horizontal whitespace (Perl 6) NHORIZWS NHORIZWS, none 0 S ; not horizontal whitespace (Perl 6) -FOLDCHAR FOLDCHAR, codepoint 1 ; codepoint with tricky case folding properties. - -# NEW STUFF ABOVE THIS LINE +# NEW STUFF SOMEWHERE ABOVE THIS LINE ################################################################################