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Message from discussion Default argument values for blocks
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Yukihiro Matsumoto  
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 More options Oct 11 2005, 1:25 pm
Newsgroups: comp.lang.ruby
From: Yukihiro Matsumoto <m...@ruby-lang.org>
Date: Wed, 12 Oct 2005 02:25:33 +0900
Local: Tues, Oct 11 2005 1:25 pm
Subject: Re: Default argument values for blocks
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Hi,

In message "Re: Default argument values for blocks"
    on Wed, 12 Oct 2005 01:56:52 +0900, Daniel Schierbeck <daniel.schierb...@gmail.com> writes:

|Is there a reason why I can't do this?
|
|   foo = lambda { |foo = bar| puts foo }
|   foo.call
|
|I can't think of any good reason why this isn't valid.

Mostly because yacc does not allow it.  It confuses

  lambda { |foo = bar| puts foo }

as

  lambda { |foo = (bar| puts foo) }

and causes syntax error.

                                                        matz.


 
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