Issue #10344 has been updated by Koichi Sasada.


 On 2014/10/12 1:28, Knut.Franke / gmx.de wrote:
 > For some more sophisticated examples, see https://github.com/nome/coroutines. The library does work with vanilla Ruby, but the patch improves performance.
 > 
 > Also, similar code can be simplified by using Fiber#raise. Compare e.g. the two implementation of Consumer::Yielder#await at
 > https://github.com/nome/coroutines/blob/master/lib/coroutines/base.rb
 
 I understand this feature helps some libraries. But I can't understand
 why it is important.
 
 I'm afraid that introducing such feature increases complexity of Fiber.
 Basically, I want to recommend strongly that using Fiber as
 semi-croutine, ristricted feature.
 
 At least, such feature should be located at ext/fiber.
 
 -- 
 // SASADA Koichi at atdot dot net

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Feature #10344: [PATCH] Implement Fiber#raise
https://bugs.ruby-lang.org/issues/10344#change-49483

* Author: Knut Franke
* Status: Open
* Priority: Normal
* Assignee: 
* Category: 
* Target version: 
----------------------------------------
While it is possible to implement this in pure Ruby (by wrapping Fiber.yield and Fiber#resume), this feels like a low-level feature that ought to be provided out of the box. Also, the C implementation is more straight-forward, and more efficient. Unfortunately, it is not quite possible to implement this as a C extension module (without resorting to wrappers again); cf. the change to make_passing_arg().

Example usage:

~~~
fib = Fiber.new do
  counter = 0
  loop { counter += Fiber.yield }
  counter
end
fib.resume
fib.resume 10
fib.resume 100
fib.raise StopIteration # => 110
~~~

---Files--------------------------------
0001-Implement-Fiber-raise.patch (4.12 KB)


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