From: SASADA Koichi <ko1@...>
Date: 2011-06-10T04:22:16+09:00
Subject: [ruby-core:36899] Re: [Ruby 1.9-Feature#4326][Open] Fiber should respond to call() and []

Hi,

Sorry for late response.

(2011/01/26 16:08), Aaron Patterson wrote:
> Feature #4326: Fiber should respond to call() and []
> http://redmine.ruby-lang.org/issues/show/4326
> 
> Author: Aaron Patterson
> Status: Open, Priority: Normal
> Assigned to: Koichi Sasada
> 
> Fibers are considered to be coroutines.  Knuth says "Subroutines are special cases of ... coroutines".  This makes sense to me.
> 
> Method, Proc, and lambda respond to `call` and `[]`.  If Fiber also responded to `call` and `[]`, we could use coroutines in places where we use lambdas, procs, and methods.
> 
> I've attached a patch that implements the two methods.

I don't understand all of this thread.  However, as I said to aaron at
IRC, I want to reject this proposal.

Reasons:
(1)  Proc is restartable.  It can be called infinite times.  In general,
Fiber is not for such usage.

(2) If we permit Fiber#call, maybe other guys say "should support
Fiber#[]".  However, as you mention, Fiber#[] is ambiguous with Fiber
local storage.

-- 
// SASADA Koichi at atdot dot net