From: Yukihiro Matsumoto <matz@...>
Date: 2011-12-12T00:57:32+09:00
Subject: [ruby-core:41590] [ruby-trunk - Bug #5694][Rejected] Proc#arity doesn't take optional arguments into account.


Issue #5694 has been updated by Yukihiro Matsumoto.

Status changed from Assigned to Rejected

We are not going to add incompatible changes to trunk, unless we see consensus after discussion. I think this is not the case. Currently and for near future, arity ignores optional arguments.  Use #parameters or propose new API like #arity_range (in a separate proposal).
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Bug #5694: Proc#arity doesn't take optional arguments into account. 
http://redmine.ruby-lang.org/issues/5694

Author: Marc-Andre Lafortune
Status: Rejected
Priority: Normal
Assignee: Yukihiro Matsumoto
Category: 
Target version: 
ruby -v: -


Currently:

    ->(foo = 42){}.arity # => 0, should be -1

This is contrary to the documentation and to what we should expect from the equivalent method definition.

Fixed in trunk, requesting backport for the 1.9 line.



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