From: mathew <meta@...>
Date: 2006-03-17T04:27:29+09:00
Subject: Re: [ ruby-Bugs-3843 ] "not" operator used in expression that is a method parameter can generate syntax error

Yukihiro Matsumoto wrote:
> OK.  Keyword logical operators (and, or, not) are far lower precedence
> than comma, even lower than method calls without argument parentheses
> (in parser, they are called as commands), so that they are not allowed
> be a part of argument expression.

I still don't understand why foo(!(1<2)) is OK, but foo(not(1<2)) isn't.

The pickaxe says that the only difference between '!' and 'not' is
precedence, and in these two cases everything is explicitly bracketed so
precedence shouldn't be involved.

What am I missing?


mathew