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Date: Thu, 5 Nov 2015 23:42:18 +0000
From: Eric Wong <normalperson@yhbt.net>
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 <redmine.journal-54725.20151105230142.70d38833d49fdb48@ruby-lang.org>
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Subject: [ruby-core:71361] Re: [Ruby trunk - Feature #11537] Introduce "Safe
 navigation operator"
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tom.enebo@gmail.com wrote:
> How about '\'?  We can pay homage to Windows file delimeter?
> 
> a\b\c
> 
> I just scanned lexer and I cannot think of a reason off the top of my head why not...what does \ mean?  who knows...what for .? mean?  I don't know that either.  This suggestion is twice as efficient though since it only uses one character.

It's already used for continuing long lines.