From: Andreas Roehler <andreas.roehler@online.de>
To: dino chiesa <dpchiesa@hotmail.com>
Cc: bug-cc-mode@gnu.org, emacs-devel@gnu.org
Subject: Re: cc-mode help - how to support literal strings in C# syntax?
Date: Tue, 29 Dec 2009 11:43:58 +0100 [thread overview]
Message-ID: <4B39DD6E.1070204@online.de> (raw)
In-Reply-To: <COL124-W3346F2BC0E4B337FBB8D1ECE7A0@phx.gbl>
dino chiesa wrote:
>
> I'm improving the csharp-mode from http://www.emacswiki.org/emacs/CSharpMode . In case you're not aware, it's derived from cc-mode, something like Java, but with a few different syntactic quirks.
>
> The existing csharp-mode.el is pretty good.
> There were a couple things I fixed:
>
> - #if/else/endif was not being properly recognized,
> was indenting and fontifying strangely
>
> - a struct was not being treated as a class - indenting inside the block was broken.
>
> - class definitions that derived from other classes were not being parsed as a class.
>
> These are all minor things I was able to resolve by using c-lang-defconst on various constants: c-typeless-decl-kwds, c-other-block-decl-kwds, c-cpp-message-directives, c-cpp-expr-directives, c-colon-type-list-kwds, c-symbol-chars, c-block-prefix-disallowed-chars, and a few others.
>
> There's one think I haven't been able to resolve. In C# syntax, strings can be specified as they are in C - surrounded by quotes. There's also a special form of literal string that begins with @, n which all characters in the string are to be treated as "escaped". In other words
>
> @"\usr\bin" == "\\usr\\bin"
>
> The problem happens when the literal string ends in a slash. Eg @"\usr\bin\" The cc-mode syntax engine sees that as an unterminated string, the \" is an escaped double-quote. On the other hand the C# compiler sees it as a string of 9 chars.
>
> Because it isn't parsed correctly, the fontification and indenting is wrong after a @-prefixed string that ends in a slash.
>
>
> How can I get the prefixed strings to be treated correctly?
>
Made a beg-end.el for this kind of parsings.
Would try it with your problem.
Feel free to send me your mode as far its done.
Maybe some larger test-code too.
Should you want to try it yourself, get beg-end.el at
https://code.launchpad.net/s-x-emacs-werkstatt/
Andreas
>
> Defining a special c-in-literal seems not to be it. That function uses parse-partial-sexp , which apparently determines if the point is within a string or not.
>
> Modifying the syntax table to insert @ as a special prefix is also not it.
>
> Any suggestions?
>
> dpchiesa@hotmail.com
>
> _________________________________________________________________
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>
next prev parent reply other threads:[~2009-12-29 10:43 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-12-29 1:51 cc-mode help - how to support literal strings in C# syntax? dino chiesa
2009-12-29 10:43 ` Andreas Roehler [this message]
2009-12-30 4:40 ` dino chiesa
2010-01-01 11:43 ` Andreas Roehler
2010-01-01 16:04 ` Andreas Roehler
2009-12-30 5:01 ` first-class support for csharp in cc-mode.el dino chiesa
2009-12-30 6:17 ` Miles Bader
2009-12-30 7:18 ` dino chiesa
2009-12-30 11:09 ` Miles Bader
2009-12-30 15:00 ` dino chiesa
2009-12-30 15:19 ` Alan Mackenzie
2009-12-30 15:39 ` Stefan Monnier
2009-12-30 16:29 ` dino chiesa
2009-12-30 16:57 ` Stefan Monnier
2009-12-30 21:01 ` Alan Mackenzie
2009-12-30 21:03 ` dino chiesa
2009-12-31 2:44 ` Miles Bader
2009-12-31 2:58 ` Jason Rumney
2009-12-31 3:08 ` Deniz Dogan
2009-12-31 3:18 ` dino chiesa
2009-12-31 3:13 ` dino chiesa
2009-12-31 11:43 ` Vagn Johansen
2009-12-30 20:19 ` Alan Mackenzie
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