From: George Ogata <g_ogata@...>
Date: 2006-01-02T18:23:04+09:00
Subject: Re: Listing Ruby keywords

"Gene Tani" <gene.tani@gmail.com> writes:

> George Ogata wrote:
>> John Maclean <info@jayeola.org> writes:
>>
>> > Is there a simple way to find out all or most of the built-in
>> > keywords? I know that if a keyword's in a ruby script that the
>> > debugger will tell you but I'd like to know before hand, in other
>> > words when I'm actually writing the scripts.
>>
>> Can't use an editor with syntax coloring?  ;-)
>>
>> The emacs ruby-mode colors these as keywords:
>>
>> 	       "alias"
>> 	       "and"
>> 	       "begin"
>> 	       "break"
>> 	       "case"
>> 	       "catch"
>> 	       "class"
>> 	       "def"
>> 	       "do"
>> 	       "elsif"
>> 	       "else"
>> 	       "fail"
>> 	       "ensure"
>> 	       "for"
>> 	       "end"
>> 	       "if"
>> 	       "in"
>> 	       "module"
>> 	       "next"
>> 	       "not"
>> 	       "or"
>> 	       "raise"
>> 	       "redo"
>> 	       "rescue"
>> 	       "retry"
>> 	       "return"
>> 	       "then"
>> 	       "throw"
>> 	       "super"
>> 	       "unless"
>> 	       "undef"
>> 	       "until"
>> 	       "when"
>> 	       "while"
>> 	       "yield"
>>
>> And these as special variables:
>>
>>   nil, self, true, false, __FILE__, __LINE__
>>
>> Aside from that I can only think of:
>>
>>   BEGIN, END, defined?
>
> The Nutshell doesn't list "raise" as a keyword
>
> class Blah
>     def testraise
>         raise=3
>         "raise local var: #{raise}"
>     end
> end
>
> a=Blah.new()
> p a.testraise    # =>"raise local var: 3"
>
> and i always wondered why public, protected and private weren't
> keywords also

Because they're not really keywords; they're methods of Module.  Try
ri on them... :-)

On closer examination, catch, fail, raise and throw aren't keywords
either.  It's handy to have them highlighted though.