From: David Garamond <lists@...6.isreserved.com>
Date: 2004-04-21T00:34:14+09:00
Subject: Ruby2: keyword argument

Will Ruby2 support required keyword argument? AFAIR, Python doesn't:

  def foo(a, b=2):
    ...

  foo(a=1) # ok
  foo(a=1, b=2) # ok

and Perl6 will:

  sub foo(+$a is required, +$b is required) {
    ...
  }

  # note: i'm not sure about the exact P6 syntax for calling
  foo(a: 1); # error!
  foo(a: 1, b: 2) # ok

This is being discussed at perl6-language list right now. I also believe 
with the poster that basically said required keyword argument is 
essential for a "proper" keyword-based API.

Also, implementation-wise, will the introduction of keyword arguments in 
Ruby2 bring a performance hit to all method calls, including positional 
arguments? (I.e., will normal/positional argument calls in Ruby2 be 
slower than Ruby1?)

-- 
dave