From: w_a_x_man <w_a_x_man@...>
Date: 2010-10-23T06:10:15+09:00
Subject: Re: Why no yield in 1.9.2 blocks?

On Oct 22, 3:09 pm, Ed Howland <ed.howl...@gmail.com> wrote:
> Hi,
>
> I searched in vain for the answer, but why doesn't yield work inside
> Ruby 192 blocks. The syntax allows you to pass the blocks as a &blk
> param, but you have to call the block with blk.call. If you try to use
> yield, you get a LocalJumpError:
>
> ruby-1.9.2-p0 > l= lambda {|&blk| yield}
>  => #<Proc:0x000001009d4ad0@(irb):2 (lambda)>
> ruby-1.9.2-p0 > l.call {puts 1}
> LocalJumpError: no block given (yield)
>         from (irb):2:in `block in irb_binding'
>         from (irb):3:in `call'
>         from (irb):3
>         from /Users/edh/.rvm/rubies/ruby-1.9.2-p0/bin/irb:17:in `<main>'

irb(main):002:0> p = proc{|&blk| yield}
=> #<Proc:0x02833540@(irb):2>
irb(main):003:0> p.call{puts 1}
LocalJumpError: no block given
        from (irb):2
        from (irb):3:in `call'
        from (irb):3
        from :0
irb(main):004:0> VERSION
=> "1.8.7"