From: Tanaka Akira <akr@...17n.org>
Date: 2002-04-04T19:04:55+09:00
Subject: [ruby-dev:16753] Re: sharing sub-regexp

In article <1017890618.302241.17865.nullmailer@ev.netlab.jp>,
  matz@ruby-lang.org (Yukihiro Matsumoto) writes:

> |($B@55,I=8=$N3HD%$J$N$G!"$^$D$b$H$5$s$K3NG'$,I,MW$G$7$g$&$,!#(B)
> 
> $BL>A0!#(BPython$B$H(B.NET$B$N$=$l$>$l$G@55,I=8=$K$3$N5!G=$,DI2C$5$l$F(B
> $B$$$^$9$,!"L>A0$,0c$$$^$9!#$J$<$+(BPerl$B$K$O$J$$$s$G$9$h$M!#(B

$B$($'$H!"$3$N(B Python $B$d(B .NET $B$N$O(B shy group $B$r4^$^$J$$$N$GHyL/$K$:$l$F(B
$B$$$?$j$9$k$s$G$9$,$=$l$O$=$l$H$9$k$H!"A[A|$G$9$,!"(BPerl $B$G$OL>A0$rIU$1(B
$B$F$b(B Perl $B$N%3!<%I$+$i%"%/%;%9$9$k$3$H$,$G$-$J$$(B(MatchData $B$KBP1~$9$k(B
$B$b$N$,$J$$$N$GFC<lJQ?t$r$5$i$KA}$d$9I,MW$,$"$k(B)$B$+$iF~$l$K$/$$$s$8$c$J(B
$B$$$G$9$+$M!#(B

Python $B$G$O(B MatchObject (Ruby $B$G$$$&(B MatchData) $B$,$"$k$N$G!"(Bgroup $B%a%=%C(B
$B%I$KL>A0$rJ8;zNs$GEO$9$3$H$K$h$j<+A3$K<h$j=P$;$^$9!#(B

Ruby $B$K$"$C$F$b$Y$D$KLdBj$J$$5!G=$@$H;W$$$^$9!#(B$~[:name] $B$H$+$G<h$j=P(B
$B$;$P$$$$$N$G$7$g$&!#$?$V$s!"$H$F$bJXMx$@$H;W$$$^$9!#(B

$B$?$H$($P!":G6a!"(B

      if /(\A\z)
         |(\A\*)
         |(\A\d\.)
         |(\A:)
         |(\A\s)
         |(\A---)
         |(\A=)
         |(\A\|\s)
         /x =~ line
        if    $~[1]; '_'
        elsif $~[2]; 'u'
        elsif $~[3]; 'o'
        elsif $~[4]; 'd'
        elsif $~[5]; 'i'
        elsif $~[6]; 'h'
        elsif $~[7]; enable_section ? 's' : 'X'
        elsif $~[8]; 't'
        end

$B$H$$$&%3!<%I$r=q$$$?$N$G$9$,!"$3$N%3!<%I$G$OHV9f$NBP1~$r$H$k$N$,Lq2p$G(B
$B$9!#$b$7!"(B

      if /(?<empty>\A\z)
         |(?<unordered>\A\*)
         |(?<ordered>\A\d\.)
         |(?<definition>\A:)
         |(?<indent>\A\s)
         |(?<hr>\A---)
         |(?<section>\A=)
         |(?<table>\A\|\s)
         /x =~ line
        if    $~[:empty]; '_'
        elsif $~[:unordered]; 'u'
        elsif $~[:ordered]; 'o'
        elsif $~[:definition]; 'd'
        elsif $~[:indent]; 'i'
        elsif $~[:hr]; 'h'
        elsif $~[:section]; enable_section ? 's' : 'X'
        elsif $~[:table]; 't'
        end

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$B$>$l$N%Q%?!<%s$GJL8D$K%^%C%A$5$;$F$b$$$$$N$G$9$,!"(BString#scan $B$d(B
String#gsub $B$@$H$=$&$b$$$-$^$;$s!#(B

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.NET $B$G$O$=$l$@$1$G$O$J$$$H$3$m$K$OCm0U$7$J$$$H$$$1$J$$$+$bCN$l$^$;$s!#(B

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  href=(?:"(?<val>[^"]*)"|(?<val>[^ >]*)

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-- 
[$BEDCf(B $BE/(B][$B$?$J$+(B $B$"$-$i(B][Tanaka Akira]
$B!V$U$($m(B! $B$o$+$a$A$c$s:n@o$G$9$(C"=$B!W(B(Little Worker, $B7KM7@84](B)