Passing a proc as block to a method from a C extension

ruby-talk
1

Hi,

I am looking for a way to do the equivalent of the following ruby function in a C extension:

def foo(my_proc)
     bar(&my_proc)
end

(and it should also work if bar is instance_eval or module_eval)

I couldn't find a way to do this, the only idea I have is to do something like:

def foo(my_proc)
     bar { |arg| my_proc.call(arg) }
end

This can be done using rb_iterate, but it obviously doesn't work with instance_eval and module_eval.

Any ideas?

Dominik

2

HI,

···

In message "Re: Passing a proc as block to a method from a C extension" on Sun, 19 Feb 2006 03:56:52 +0900, "Dominik Bathon" <dbatml@gmx.de> writes:

I am looking for a way to do the equivalent of the following ruby function
in a C extension:

def foo(my_proc)
    bar(&my_proc)
end

(and it should also work if bar is instance_eval or module_eval)

Currently there's no good way, since no one has complained loudly
before. Let me think about your request.

              matz.

3

Ok, thanks. That's what I thought.

I would like to have a function like

VALUE rb_iterate_proc(VALUE (*it_proc)(), VALUE data1, VALUE proc);

that would work like block_pass().

Btw. could we also get a version of rb_iter_break that breaks with a value instead of just nil?

Dominik

···

On Mon, 20 Feb 2006 01:01:28 +0100, Yukihiro Matsumoto <matz@ruby-lang.org> wrote:

HI,

In message "Re: Passing a proc as block to a method from a C extension" > on Sun, 19 Feb 2006 03:56:52 +0900, "Dominik Bathon" <dbatml@gmx.de> > writes:

>I am looking for a way to do the equivalent of the following ruby function
>in a C extension:
>
>def foo(my_proc)
> bar(&my_proc)
>end
>
>(and it should also work if bar is instance_eval or module_eval)

Currently there's no good way, since no one has complained loudly
before. Let me think about your request.