From: Tanaka Akira <akr@...17n.org>
Date: 2001-06-09T02:29:39+09:00
Subject: [ruby-dev:13521] Re: yield *[[]]

asgn.rb $B$rFI$s$G$_$^$7$?$,(B... $B$J$s$H$$$&$+(B nil.to_a $B$,(B [] $B$G$"$k$3$H$r(B
$B9*$_$KMxMQ$7$?;EMM$G$9$M$'!#$$$^$N$H$3$m7j$O8+Ev$?$j$^$;$s!#(B

In article <992017723.851616.25167.nullmailer@ev.netlab.zetabits.com>,
  matz@zetabits.com (Yukihiro Matsumoto) writes:

> |$B!VB?=EBeF~$K$*$$$F1&JU$N(B($BG[Ns$X$N(B)$BJQ497k2L$r(B ... = *exp $B$H$7$F;XDj$G$-(B
> |$B$J$$$N$O$1$7$+$i$s!#$J$s$G(B ... = [*exp] $B$J$s$>$H$;$M$P$J$i$s$N$@!W$H$+!#(B
> 
> $B$C$F$3$H$+$7$i!#(B

$B$=$&$9$k$H:8JU$K$h$C$F$OB?=EBeF~$G$O$J$/$J$C$F$7$^$&$s$G!"0JA0$N5sF0$@(B
$B$H$=$l$O$=$l$G$^$:$$$s$G$9!#$?$V$s!#(B

> $B1&JU%H%C%W%l%Y%k$N(B * $B$K$O!VE83+7k2L$N(B[]$B$r<h$j=|$/!W$H$$$&0U(B
> $BL#$rM?$($F$$$k$s$G!"$?$H$(B?$/$N>l9g6&DL$N7k2L$rF@$k$3$H$,$G(B
> $B$-$k$H$7$F$b!V1&JU$NG[Ns$X$NJQ49!W$H$7$F$O!"$d$O$jIT40A4$@$H(B
> $B;W$$$^$9(B($B$7!"$3$3$r40A4$K$9$kI,MW$O$"$^$j$J$$$+$J(B)$B!#(B
> 
> $B$=$N>l9g$K$O!"(B($B%?%$%WNL$,B?$/$J$k$N$O3N$+$G$9$,(B)$B$h$j0UL#$NL@(B
> $B3N$J!"(B[*exp]$B$d(BArray(exp)$B$r;H$C$F$$$?$@$/$N$,$h$m$7$$$N$G$O$J(B
> $B$$$+$H;W$$$^$9!#(B

$B$G$b!"?7$7$$5sF0$@$HB?=EBeF~$@$m$&$H$=$&$G$J$+$m$&$H7k2L$OF1$8$K$J$k$h(B
$B$&$J$N$G!"LdBj$J$$$_$?$$$G$9$M!#(B

$B$b$7$+$9$k$H!"BeF~$rJ,3d2DG=$K$9$k$H$$$&@)Ls$+$i!"1&JU$NCM$O:8JU$K4X$o(B
$B$i$:7hDj$5$l$k$H$$$&7kO@$rF3=P$G$-$k$N$+$bCN$l$^$;$s!#(B($B$"$^$j??LLL\$K(B
$B8!F$$7$?$o$1$8$c$J$$$1$I!#(B)

> |% ruby -e 'p ((a = *[[1,2,3]]))' 
> |[1, 2, 3]
> |
> |# $B$&$%$`!#$=$C$+!#$+$C$3$,0l=E$J$N$r5v$9$HJ8K!$,[#Kf$K$J$k$N$+(B...
> 
> $B$=$&$J$s$G$9$M!#(Byacc$B$N8B3&$H$$$&$+$J$s$H$$$&$+!#<+A0$G%Q!<%6(B
> $B$r=q$$$F9%$-$J$@$1%P%C%/%H%i%C%/$5$;$l$PNI$$$s$G$7$g$&$1$I(B...

btyacc $B$H$+(B?  $B;H$C$?$3$H$,$J$$$s$G$I$NDxEY;H$$$b$N$K$J$k$N$+$OCN$j$^$;(B
$B$s$,!#(Bzyacc $B$O(B... $B$3$N>l9g$O$"$^$jLr$KN)$?$J$$$+!#$?$V$s!#(B

$B$G$b!"(B
  p (a = 1, 2)
$B$J$I$OK\<AE*$K[#Kf$J$N$G!"5v$5$J$$$H$$$&$N$b0l$D$N8+<1$+$H!#(B

$B$=$l$O$=$l$H$7$F!"(Bparse.y $B$N(B mlhs $B$rFI$s$@$s$G$9$,(B... nest $B$,5v$5$l$F(B
$B$$$k$H$$$&$N$O0U30$9$.$^$9!#(B
-- 
[$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)