# Fiber $B$b$I$-(B for 1.8.x

**URL:** <https://www.ruby-forum.com/t/fiber-b-b-i-b-for-1-8-x/142250>\
**Category:** Development\
**Created:** [July 5, 2008, 7:13am UTC](https://www.ruby-forum.com/t/fiber-b-b-i-b-for-1-8-x/142250 "2008-07-05T07:13:22Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![IWAMURO\_Motonori](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/i/ce7236/32.png) [@IWAMURO\_Motonori](https://www.ruby-forum.com/u/IWAMURO_Motonori)\
**Post date:** [July 5, 2008, 7:13am UTC](https://www.ruby-forum.com/t/fiber-b-b-i-b-for-1-8-x/142250/1 "2008-07-05T07:13:22Z")

</div>

岩室です。

1.9.0-2見るまで知らなかったのですが、Generator消えるんですね。

まだ1.8ユーザですが、単に消えられるとちょっと困るので、callcc  
を使って1.8にFiberもどき(もがき)を書いてみたのですが、如何でしょう?  
全く同じ動作にはできなかったのですが、Generatorの代替ならこれでいいかな、と……。  
callcc ã®æŒ¯ã‚‹èˆžã„ã«é ­ãŒæ··ä¹±ã—ã¦ã‚‹ã®ã§ä½•ã‹ãƒ¯ãƒŠãŒã‚ã‚‹ã‹ã‚‚ã—ã‚Œã¾ã›ã‚“ãŒã€‚  
実験的に書いたので日本語コメントが入りまくっています。  
なお、test\_fiber18.rb は1.9ã‹ã‚‰ã‚‚ã‚‰ã£ã¦ãã¦æ‰‹ã‚’åŠ ãˆãŸã‚‚ã®ã§ã™ã€‚

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**Author:** ![IWAMURO\_Motonori](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/i/ce7236/32.png) [@IWAMURO\_Motonori](https://www.ruby-forum.com/u/IWAMURO_Motonori)\
**Post date:** [July 6, 2008, 8:38am UTC](https://www.ruby-forum.com/t/fiber-b-b-i-b-for-1-8-x/142250/2 "2008-07-06T08:38:41Z")

</div>

e$B$J$+$@$G$9!#e(B

At Sat, 5 Jul 2008 14:09:25 +0900,  
IWAMURO Motonori wrote in [ruby-dev:35369]:

> 1.9.0-2e$B8+$k$^$GCN$i$J$+$C$?$N$G$9$,!"e(BGeneratore$B\>C$($k$s$G$9$M!#e(B
> 
> e$B$^$@e(B1.8e$B%f!\<%6$G$9$,!"C1$K\>C$($i$l$k$H$A$g$C$H:$$k$N$G!"e(Bcallcc e$B$r;H$C$Fe(B1.8e$B$Ke(BFibere$B$b$I$-e(B(e$B$b$,$-e(B)e$B$r=q$$$F$\_$?$N$G$9$,!"G!2?$G$7$g$&e(B?  
> e$BA4$/F1$8F0:n$K$O$G$-$J$+$C$?$N$G$9$,!“e(BGeneratore$B$NBeBX$J$i$3$l$G$$$$$+$J!”$H!D!D!#e(B

e$B40A4$KF1$8$G$O$"$j$^$;$s$,!"e(BGeneratore$B$NBeBX$H$7$F$Oe(B  
Enumerator#nexte$B$,;H$($k$O$:$G$9!#e(B

e$B$H$$$&$+e(BGeneratore$B$NBe$o$j$Ke(BFibere$B$r!"$H$$$&N.$l$,IT;W5D$J$s$G$9$,!#e(B

---

<div class="post-metadata">

**Author:** ![IWAMURO\_Motonori](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/i/ce7236/32.png) [@IWAMURO\_Motonori](https://www.ruby-forum.com/u/IWAMURO_Motonori)\
**Post date:** [July 6, 2008, 9:49am UTC](https://www.ruby-forum.com/t/fiber-b-b-i-b-for-1-8-x/142250/3 "2008-07-06T09:49:25Z")

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e$B1sF#$G$9!#e(B

2008/07/05 14:09 IWAMURO Motonori [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid):

> 1.9.0-2e$B8+$k$^$GCN$i$J$+$C$?$N$G$9$,!"e(BGeneratore$B\>C$($k$s$G$9$M!#e(B
> 
> e$B$^$@e(B1.8e$B%f!\<%6$G$9$,!"C1$K\>C$($i$l$k$H$A$g$C$H:$$k$N$G!"e(Bcallcc e$B$r;H$C$Fe(B1.8e$B$Ke(BFibere$B$b$I$-e(B(e$B$b$,$-e(B)e$B$r=q$$$F$\_$?$N$G$9$,!"G!2?$G$7$g$&e(B?

e$B5U$K!"e(BFiber e$B$r;H$C$Fe(B 1.9 e$BMQ$Ke(B generator.rb  
e$B$r=q$$$F$\_$^$7$?!#e(B  
e$BB(6=$G=q$$$?$N$G??LLL$K8!\>Z$7$F$J$$$G$9$,!"e(B1.8 e$B$Ne(B  
generator.rb e$B$Ke(B  
e$BIUB0$7$F$$$?%F%9%H$O%Q%9$7$^$7$?!#e(B

class Generator  
include Enumerable

def initialize(enum = nil, &block)  
@block = enum ? proc {|g| enum.each {|x| g.yield(x) } } : block  
@fiber = Fiber.new { @block.call(self); @fiber = nil }  
@index = 0  
@queue = []  
@fiber.resume  
end

def yield(value)  
@queue \<\< value  
Fiber.yield(value)  
end

def end?  
@fiber.nil? && @queue.empty?  
end

def next?  
!end?  
end

def index  
@index  
end  
alias pos index

def next  
raise(EOFError, “no more elements available”) if end?  
@fiber.resume  
@index += 1  
@queue.shift  
end

def current  
raise(EOFError, “no more elements available”) if @queue.empty?  
@queue.first  
end

def rewind  
initialize(nil, &@block) if @index.nonzero?  
self  
end

def each  
rewind  
yield self.next until end?  
self  
end  
end

---

<div class="post-metadata">

**Author:** ![IWAMURO\_Motonori](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/i/ce7236/32.png) [@IWAMURO\_Motonori](https://www.ruby-forum.com/u/IWAMURO_Motonori)\
**Post date:** [July 6, 2008, 2:34pm UTC](https://www.ruby-forum.com/t/fiber-b-b-i-b-for-1-8-x/142250/4 "2008-07-06T14:34:52Z")

</div>

e$B4d\<\<$G$9!#e(B

2008/07/06 15:32 Nobuyoshi N. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid):

> e$B40A4$KF1$8$G$O$"$j$^$;$s$,!"e(BGeneratore$B$NBeBX$H$7$F$Oe(B  
> Enumerator#nexte$B$,;H$($k$O$:$G$9!#e(B

e$B:Q$_$^$;$s!“%^%K%e%”%k$r$"$5$C$F$_$?$s$G$9$,!"e(BGeneratore$BIw$N;H$$J}$,A4$/$o$+$j$^$;$s$G$7$?!#e(B  
e$B$d$j$?$$$3$H$O$3$s$J46$8$N$3$H$G$9$,!"e(BEnumeratore$B$G$O$I$&=q$1$P$$$$$s$G$7$g$&!#e(B

# Generatore$B$N%V%m%C%/$NCf$G$N=hM}7k2L$r!"e(B

g = Generator.new{|g| IO.popen(“tar --help”) {|io| io.each\_line  
{|line| g.yield(line)}}}  
…

# e$B$I$3$+1s$/$N$H$3$m$G\<hF@$7$?$$e(B

while g.next?; io.print(g.next); end

> e$B$H$$$&$+e(BGeneratore$B$NBe$o$j$Ke(BFibere$B$r!"$H$$$&N.$l$,IT;W5D$J$s$G$9$,!#e(B

e$B\<B$O\<j85$Ke(BFibere$B$G=q$-D\>$7$?e(Bgenerator.rbe$B$b$“$C$?$s$G$9$,!D!D!#=q$/$N$O$9$4$/4JC1$@$C$?$N$Ke(B  
e$B\>C$($F$?$N$G!“2?$+M}M3$,$”$k$N$+$H;W$C$F2a5n%a!\<%k$r$”$5$C$F$\_$?$H$3$m!"e(B[ruby-dev:34278]  
e$B$NN.$l$r8+$F!Ve(BGeneratore$B$O\>C$7$^$7$g$&!W$H$$$&$N$,%3%s%;%s%5%9$J$N$+$H;W$C$?$N$G$7$?!#e(B

e$B$G!“$I$&$;:#$+$i=q$/$N$J$ie(BFibere$B$G=q$$$F$\*$1$P\>-Mh$N0\9T$N$H$-$K9M$($J$/$F$$$$$s$8$c$J$$$+e(B  
e$B$H$$$&$3$H$G!”\>/$J$/$H$b\>e$NNc$G=q$$$?$h$&$J$3$H$,$G$-$kDxEY$N5!G=$r\<BAu$7$F$\_$?$N$,!"e(B  
e$B7o$N%3!\<%I$G$9!#e(B