I'm writing a Ruby 1.9 C extension and I want to do the following in ruby:
notifier = Notifier.new
notifier.on 'click' do
puts "clicked!"
end
Now the problem with this is that on the C method, I only "receive" a block, and, as far as I know, it's not even a parameter: I just can call with with rb_yield
.
So my question is: is there a way on a Ruby 1.9 C extension, to transform a block into a proc or something, so I can store it inside my module, and call it later whenever I want/need them? Like an async callback!
I already implemented this with Procs/lambdas, but it's just ugly not to use the block syntax directly.
In the Ruby C source you'll see this in
proc.c
:and
Proc.new
does this:So you'd do something like this:
and then later on, to call the block/Proc:
That
rb_funcall
is pretty much the C version ofp.send(:call)
.