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Re: cc-mode help - how to support literal strings in C# syntax?
From: |
Andreas Roehler |
Subject: |
Re: cc-mode help - how to support literal strings in C# syntax? |
Date: |
Fri, 01 Jan 2010 12:43:09 +0100 |
User-agent: |
Thunderbird 2.0.0.19 (X11/20081227) |
ok, had to change beg-end.el still a little bit, as beg- and end-string are
equal here
Here its use in thingatpt-utils-base.el
;; Doublequoted
(put 'doublequoted 'beginning-op-at
(lambda ()
(beginning-of-form-base "\"" "\"" nil 1)))
(put 'doublequoted 'end-op-at
(lambda ()
(when (looking-at "\"")
(end-of-form-base "\"" "\"" nil 1))))
It now returns things between regardless escapes. Not uploaded yet.
Still some minor issues, checks to do. I'll send a message, if its ready.
hopefully, happy new year
Andreas
dino chiesa wrote:
> Andreas, thanks for the reply.
> The mode is available at:
> http://www.emacswiki.org/emacs/csharp-mode.el
>
>
> And here is a source code module that exhibits the problem:
> //========================================
> using System;
> using System.Collections.Generic;
>
> namespace Example.LiteralStrings
> {
> public class Pippo
> {
> // Problem: when the final char in an "escaped" string literal is a
> // slash, indenting and fontification breaks.
> List<string> directories = new List<string> {
> // string #1 in the list
> @"C:\Temp\sub1\",
> // The emacs parser thinks the string has not ended.
> // This comment is fontified and indented as if it is in
> // the middle of a string literal.
> // string #2
> @"C:\Temp\sub2\",
> // Because we have another \" at the end of a string,
> // emacs now thinks we're "out" of the string literal.
> // This comment is now indented and fontified correctly.
> // string #3
> @"C:\Home\"
> // A third \", and now emacs thinks we're back inside the
> string literal.
> // The rest of the code will be treated as if it were
> inside the string literal.
> }; // this is indented wrongly
> // and the incorrect indenting continues all the way through
> protected void Page_Load(object sender, EventArgs e)
> {
> Console.WriteLine("Hello {0}", "world");
> }
> }
> }
>
> //========================================
>
>
> I will check out the beg-end.el as well, to see if I can figure out how to
> use it in cc-mode.
> (csharp-mode).
>
> I'll be interested to see what you find.
>
>
> -Dino
>
>
>
>> Date: Tue, 29 Dec 2009 11:43:58 +0100
>> From: address@hidden
>> To: address@hidden
>> CC: address@hidden; address@hidden
>> Subject: Re: cc-mode help - how to support literal strings in C# syntax?
>>
>> 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?
>>>
>>> address@hidden
>>>
>>> _________________________________________________________________
>>> Hotmail: Trusted email with powerful SPAM protection.
>>> http://clk.atdmt.com/GBL/go/177141665/direct/01/
>>>
>>>
>>
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- Re: cc-mode help - how to support literal strings in C# syntax?,
Andreas Roehler <=