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From: | Dmitry Gutov |
Subject: | bug#15874: 24.3.50; exit! not properly font-locked in ruby-mode |
Date: | Thu, 05 Dec 2013 01:15:37 +0200 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.1.1 |
On 04.12.2013 21:20, Stefan Monnier wrote:
I'm not sure we want to move `!' to the symbol syntax class.How is the Ruby lexing done w.r.t identifiers and ! (and ?) ?
To answer your actual question: Ruby considers ! and ? parts of identifiers only in method names, and only when the name ends with one such a character.
The names of local variables, as well as instance and global ones, can't use ? and !. We may want to handle this eventually:
irb(main):001:0> @abc?1:2 => 2 irb(main):002:0> abc = 1 => 1 irb(main):003:0> abc?2:3 SyntaxError: (irb):3: syntax error, unexpected ':', expecting $end
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