[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
RE: first-class support for csharp in cc-mode.el
From: |
dino chiesa |
Subject: |
RE: first-class support for csharp in cc-mode.el |
Date: |
Wed, 30 Dec 2009 08:29:14 -0800 |
Hi Alan, nice to meet you.
Stefan, thanks for the input.
address@hidden wrote:
>> I don't have much experience with emacs-devel, but what would it take
>> to get csharp to be supported as a first-class (built-in) language in
>> cc-mode?
>
> The current policy is not to add any more languages to the core of CC
> Mode, since it's hassle enough supporting the seven that are already
> there. There are certainly lots of users of C, C++, Java, several users
> of Objective C and AWK, but I just don't know about Pike and IDL. The
> problem is, when somebody implements support for a language directly in
> CC Mode and they move on a few years later, support for that langauge
> effectively vanishes. It was to fix this that Martin Stjernholm (my
> predecessor) implemented the c-lang-const mechanism.
>
Very clear. In that case I should be petitioning to get csharp-mode put into
the emacs progmodes distrib separately, rather than petitioning to get
csharp-mode folded into cc-mode.
> If the c-lang-const stuff is inadequate to support, say, C#, then I
> would prefer to amend CC Mode so that C# can be supported. It looks
> like the @"....." syntax will need such an amendment. This will
> probably involve a large change, since the use of \ as an escape
> character is firmly embedded in the very fabric of CC Mode. Is @ used
> for anything else in C#? Is it forbidden to have whitespace between @
> and "?
Yes, according to the lang spec, the @ must immediately be followed by a
double-quote. The symbol is not used for anything else in the language. I just
looked and this is called a "verbatim string literal".
http://www.go-mono.com/docs/index.aspx?link=ecmaspec%3a9.4.4.5
>
> In fact, I've just thought of a way of fixing this: in an after-change
> function, splat the syntax (using syntax-table text-properties) of
> anything within @"....". I think there's already a suitable hook in CC
> Mode for this.
>
Is this the approach used for handling of slashes within awk? (can be either a
divide operator or a string delimiter). I tried wading through that code but
didn't yet figure it out.
In csharp, it is not only a trailing slash that is special - the verbatim
string also allows verbatim newlines in the string. This is legal:
var s = @"The quick brown fox
jumps over the lazy dog";
and results in a string with a \n between the 4th and 5th words.
I don't know how that might affect the final design of a solution, or if it
recommends or disrecommends Stefan's suggestion to worry only about the final
slash.
>> I have no idea if this is a friendly proposal or not, but it would
>> make things nice for people who write C# and use emacs.
>
> Thanks for the proposal! Constructive suggestions are always welcome at
> CC Mode. By the way, CC Mode has its own mailing list at
> address@hidden and is hosted on sourceforge for historical reasons.
>
Ah, very good. Is bug-cc-mode intended to serve discussion related only to bugs
or potential bugs, or is it also good for random discussion or questions from
cc-derived modes? I mean, if I were to ask specifically about the verbatim
string literals, should I ask on emacs-devel or is it better on bug-cc-mode ?
>> There are still a few issues with that C# mode - lambdas have no
>> special support, and the new dynamic keyword in .NET 4.0 isn't there
>> (simple to add), and there is the literal string thing I described in
>> my other mail thread - but mostly it works well. Including this would
>> provide a good baseline of support in emacs for C#.
>
> Those are all issues for C# Mode's maintainer.
>
Right, those are issues for me (and friends) to own. I wasn't really asking for
*that*, although I may ask for specific advice on some of those in the future,
after I take a run at them, I hope you don't mind.
My real goal regarding "first class support" is to make csharp-mode official
and standard, so that someone downloading emacs 24 or 23.x will just get it. I
had originally thought that meant major surgery on cc-mode, but you're telling
me it could be simpler than that.
address@hidden wrote:
>
> So you're moving towards a CC-mode which is more like
> a "generic" engine? That's good to hear. Do you intend to then move
> support for AWK, IDL, Java, etc.. outside of the core CC-mode as well?
>
I'll let Alan address that.
_________________________________________________________________
Hotmail: Powerful Free email with security by Microsoft.
http://clk.atdmt.com/GBL/go/171222986/direct/01/
- cc-mode help - how to support literal strings in C# syntax?, dino chiesa, 2009/12/28
- Re: first-class support for csharp in cc-mode.el, Alan Mackenzie, 2009/12/30
- Re: first-class support for csharp in cc-mode.el, Stefan Monnier, 2009/12/30
- RE: first-class support for csharp in cc-mode.el,
dino chiesa <=
- Re: first-class support for csharp in cc-mode.el, Stefan Monnier, 2009/12/30
- Re: first-class support for csharp in cc-mode.el, Alan Mackenzie, 2009/12/30
- RE: first-class support for csharp in cc-mode.el, dino chiesa, 2009/12/30
- Re: first-class support for csharp in cc-mode.el, Miles Bader, 2009/12/30
- Re: first-class support for csharp in cc-mode.el, Jason Rumney, 2009/12/30
- Re: first-class support for csharp in cc-mode.el, Deniz Dogan, 2009/12/30
- RE: first-class support for csharp in cc-mode.el, dino chiesa, 2009/12/30
- RE: first-class support for csharp in cc-mode.el, dino chiesa, 2009/12/30
- Re: first-class support for csharp in cc-mode.el, Vagn Johansen, 2009/12/31
- Re: first-class support for csharp in cc-mode.el, Alan Mackenzie, 2009/12/30