From: Yehuda Katz <wycats@...>
Date: 2009-08-23T09:04:14+09:00
Subject: [ruby-core:25041] Proposal: Simpler block format

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I'd like to propose that we add the following syntax for procs in Ruby:

  x = { contents }
  x = { |y| contents }

  { contents }.should raise_error(Exception)

  call_method({ proc_1 }, { proc_2 }, { proc_3 })

Essentially, any use of {} that was not a Hash would become a proc.
Effectively, this includes all use of {} that produces a SyntaxError at the
moment ({} remains the equivalent of Hash.new). I suggested this to ujihisa,
who is an expert at parse.y, and he created a patch that implements this
behavior: http://gist.github.com/173052. This test does not cause any
regressions in the Rails test suite or RubySpec.

Among other things, this syntax makes using multiple blocks in a method call
easier on the eyes. I was not initially sure that this would be easy to do,
but ujihisa has done it!

-- 
Yehuda Katz
Developer | Engine Yard
(ph) 718.877.1325

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<div>I&#39;d like to propose that we add the following syntax for procs in =
Ruby:</div><div><br></div><div>=A0=A0x =3D { contents }</div><div>=A0=A0x =
=3D { |y| contents }</div><div>=A0=A0</div><div>=A0=A0{ contents }.should r=
aise_error(Exception)</div>

<div>=A0=A0</div><div>=A0=A0call_method({ proc_1 }, { proc_2 }, { proc_3 })=
</div><div>=A0=A0</div><div>Essentially, any use of {} that was not a Hash =
would become a proc. Effectively, this includes all use of {} that produces=
 a SyntaxError at the moment ({} remains the equivalent of Hash.new). I sug=
gested this to ujihisa, who is an expert at parse.y, and he created a patch=
 that implements this behavior: <a href=3D"http://gist.github.com/173052">h=
ttp://gist.github.com/173052</a>. This test does not cause any regressions =
in the Rails test suite or RubySpec.</div>

<div><br></div><div>Among other things, this syntax makes using multiple bl=
ocks in a method call easier on the eyes. I was not initially sure that thi=
s would be easy to do, but ujihisa has done it!</div><br>-- <br>Yehuda Katz=
<br>

Developer | Engine Yard<br>(ph) 718.877.1325<br>

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