Re: Lexical environments

[steve donovan <steve.j.donovan@...>]

On Wed, Feb 3, 2010 at 8:34 AM, pan shizhu <pan.shizhu@gmail.com> wrote:
> Please note that adding a new keyword will often result in breakage of
> many existing programs.

This is very true, at least programs will break obviously.  Still, it
is a very serious business adding a keyword, and adding little bit of
sugar is probably not a good reason.  Hence the overloading of 'in'