From: Jose Calderon-Celis <josecalderoncelis@...>
Date: 2011-05-02T00:42:45+09:00
Subject: Re: Formatting a long regex: can a character class [] be split over lines?

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http://es.w3support.net/index.php?db=so&id=150095

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Jose Calderon-Celis





2011/5/1 Alexey Muranov <muranov@math.univ-toulouse.fr>

> Hello,
> i am wandering if it is possible to split a character class ([...]) in
> Ruby regex over multiple lines.
>
> I know that the /x option allows to ignore whitespace, so i can write :
>
>    email_format = /\A(
>                      [A-Za-z\d\!\#\$\%\&\'\*\+\-\/\=\?\^\_\`\{\|\}\~]+
>                      \.)*
>                      [A-Za-z\d\!\#\$\%\&\'\*\+\-\/\=\?\^\_\`\{\|\}\~]+
>                      @([a-z\d\-]+\.)+[a-z\d\-]+\z/x
>
> However, if i try to split inside a character class:
>
>    name_format = /\A[A-Za-z\d
>                      \!\#\$\%\&\'\*\+\-\/\=\?\^\_\`\{\|\}\~]\z/x
>
> i get the warning:
>
>    warning: character class has duplicated range
>
> (apparently it is about the space character being included multiple
> times inside []).
> I want the space and newlines to be disregarded inside [] to format it
> over multiple lines, is this possible?
>
> Thanks,
>
> Alexey.
>
> --
> Posted via http://www.ruby-forum.com/.
>
>

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