From: Rick DeNatale <rick.denatale@...>
Date: 2008-02-12T21:09:39+09:00
Subject: Re: how to say # in ruby

On 2/11/08, Gerry Ford <wade@zaxfuuq.net> wrote:
> Robert Klemme wrote:

> > I'm not sure what you're at here.  You posted code from the Ruby
> > interpreter but the magical bit of shebang is done by the shell or OS
> > not Ruby.  See for example:
> >
> > http://www.google.com/codesearch?hl=de&q=+lang:c+package:kernel+%22%23!%22+show:BxIe8bIKbEg:X-2Nm3hrV4s:RaABaUcqtps&sa=N&cd=2&ct=rc&cs_p=http://kernel.org/pub/linux/kernel/v2.4/linux-2.4.34.1.tar.bz2&cs_f=linux-2.4.34.1/fs/binfmt_script.c
>
> Thanks for your continued attention, robert.  That link was very
> interesting.  (Ich hatte google noch nie auf deutsch gesehen.)  One
> snippet I found there was this one:
>
> 288:   {
>             printk( "  no PCI bus?@#!\n");
>             return NumberOfAdapters;
>
> This has #! looking very uncommentlike.  Is #! a token separate from # ?
> (Does ruby have tokens at all?)

Well the link that Robert posted was to some C code, so it shouldn't
be expected to give much insight into Ruby syntax/lexing.

Note that there ARE cases in Ruby where a # does not start a comment,
for example, it is used tor interpolation in string and regular
expression 'literals'

a = "Foo"
puts "The value of a is #{a}"

"Foo Fighters".match(/#{a)/)

And of course a # inside of string or regexp doesn't start a comment
even if it isn't triggering interpolation.

-- 
Rick DeNatale

My blog on Ruby
http://talklikeaduck.denhaven2.com/