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mruby-fiber: add Fiber.yield description; close #3066

Fiber.yield cannot be called from #initialize which is called by
mrb_funcall().  It is mruby limitation.
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matz committed Dec 31, 2015
1 parent 31b8469 commit 38b9c2d3085e6d300ec36b5a38e31f8b4927c4fc
Showing with 3 additions and 1 deletion.
  1. +3 −1 mrbgems/mruby-fiber/src/fiber.c
@@ -332,7 +332,9 @@ mrb_fiber_yield(mrb_state *mrb, mrb_int len, const mrb_value *a)
* along any arguments that were passed to it. The fiber will resume
* processing at this point when <code>resume</code> is called next.
* Any arguments passed to the next <code>resume</code> will be the
* value that this <code>Fiber.yield</code> expression evaluates to.
*
* mruby limitation: Fiber resume/yield cannot cross C function boundary.
* thus you cannot yield from #initialize which is called by mrb_funcall().
*/
static mrb_value
fiber_yield(mrb_state *mrb, mrb_value self)

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