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bug#15212: 24.3.50; c++-mode doesn't support raw string literals
From: |
Alan Mackenzie |
Subject: |
bug#15212: 24.3.50; c++-mode doesn't support raw string literals |
Date: |
Thu, 2 Jun 2016 16:36:40 +0000 |
User-agent: |
Mutt/1.5.24 (2015-08-30) |
Hello, Michael.
On Tue, May 31, 2016 at 07:52:55PM -0400, Michael Welsh Duggan wrote:
> Alan Mackenzie <acm@muc.de> writes:
[ .... ]
> >> I did find one. According to
> >> http://en.cppreference.com/w/cpp/language/string_literal the delimiter can
> >> contain any characters except parentheses, backslash and spaces.
> > Yes, I've read that and got angry with it. It's vague - it's not clear
> > what is meant by "any source character" - the C++11 page in Wikipedia
> > says that control characters are excluded. In practice, I suspect it
> > won't matter all that much - most of the time the delimiter will just be
> > "\"(" - anybody trying to do anything fancy in the delimiter deserves
> > everything she gets. ;-)
> Her's what the standard says:
> <raw-string>:
> " <d-char-sequence(opt)> ( <r-char-sequence(opt)> ) <d-char-sequence(opt)> "
> <r-char-sequence>:
> <r-char>
> <r-char-sequence> <r-char>
> <r-char>:
> Any member of the source character set, except a right-parenthesis )
> followed by the initial <d-char-sequence> (which may be empty)
> followed by a double quote ".
> <d-char-sequence>:
> <d-char>
> <d-char-sequence> <d-char>
> <d-char>:
> any member of the basic source character set except:
> space, the left parenthesis (, the right parenthesis ), the
> backslash \, and the control characters representing horizontal tab,
> vertical tab, form feed, and newline.
> Here's what it says about the basic source character set:
> The basic source character set consists of 96 characters: the space
> character, the control characters representing horizontal tab, vertical
> tab, form feed, and new-line, plus the following 91 graphical
> characters:
> a b c d e f g h i j k l m n o p q r s t u v w x y z
> A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
> 0 1 2 3 4 5 6 7 8 9
> _ { } [ ] # ( ) < > % : ; . ? * + - / ^ & | ~ ! = , \ " ’
Thanks, that's appreciated.
> --
> Michael Welsh Duggan
> (md5i@md5i.com)
--
Alan Mackenzie (Nuremberg, Germany).