From: Robert Klemme <shortcutter@...>
Date: 2007-12-21T21:01:46+09:00
Subject: Re: Problem with case statements

2007/12/21, hemant kumar <gethemant@gmail.com>:
> I have an innocent looking code:
>
> 54:    def find(*args)
> 55:      options = args.extract_options!
> 56:      validate_find_options(options)
> 57:      case args.first
> 58:      when :first: find_first(options)
> 59:      when :all: find_all(options)
> 60:      else raise "Invalid find"
> 61:      end
> 62:    end
>
>
> Now, above case statement totally blows up with Ruby 1.9:
>
> /home/hemant/push_server/lib/db_connection.rb:61: warning: else without
> rescue is useless
> /home/hemant/push_server/bin/boot.rb:34:in
> `require': /home/hemant/push_server/lib/db_connection.rb:58: syntax
> error, unexpected ':', expecting keyword_then or ',' or ';' or
> '\n' (SyntaxError)
>       when :first: find_first(options)
>                   ^
> /home/hemant/push_server/lib/db_connection.rb:59: syntax error,
> unexpected keyword_when, expecting keyword_end
>       when :all: find_all(options)
>           ^
> /home/hemant/push_server/lib/db_connection.rb:87: syntax error,
> unexpected keyword_end, expecting $end
> from /home/hemant/push_server/bin/boot.rb:34:in `<top (required)>'

Does the same error surface if you precede the colon with a space?
Sorry, I don't have a 1.9 here to test this myself.

> However if i rewrite it like this, it works:
>
>     def find(*args)
>       options = args.extract_options!
>       validate_find_options(options)
>       case args.first
>       when :first
>         find_first(options)
>       when :all
>         find_all(options)
>       else
>         raise "Invalid find"
>       end
>     end
>
> Why is this? Was this intended?

Maybe the form with colon is deprecated?

Kind regards

robert


-- 
use.inject do |as, often| as.you_can - without end