Oren Eini

aka Ayende Rahien

Oren Eini

CEO of RavenDB

a NoSQL Open Source Document Database

Get in touch with me:

oren@ravendb.net +972 52-548-6969

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Deep Dive into RavenDB webinars
  previous post next post  
Feb 14 2008

Fun with DSL - Didja know the CLR allows it?

time to read 1 min | 22 words

I swear that I didn't mean to do it, but it just happened.

image

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Tags:
  • Domain Specific Languages

  previous post next post  

Comments

Florian Krüsch
14 Feb 2008
14:48 PM
Florian Krüsch

hehe, that's funny. Díd you use ILASM to create that?

Ayende Rahien
14 Feb 2008
14:55 PM
Ayende Rahien

No, Boo DSL based on XML storage.

Freaky stuff

Peter Ritchie
14 Feb 2008
15:33 PM
Peter Ritchie

Yeah, sorta the basis of much obfuscation software: just rename members to use something in the Unicode set that C#/VB/etc doesn't support...

James Curran
14 Feb 2008
15:42 PM
James Curran

I wonder if that were part of the changes for the C++/CLR version, where has things like "for each" being a single keyword.

Luke Breuer
14 Feb 2008
17:18 PM
Luke Breuer

Why are you specifying an hour value in hex?

Ayende Rahien
14 Feb 2008
17:49 PM
Ayende Rahien

That is a Reflector setting

Justin Etheredge
14 Feb 2008
20:49 PM
Justin Etheredge

Hmm, it is surprising that they allow that.

Yuri Korchyomkin
15 Feb 2008
05:50 AM
Yuri Korchyomkin

Yes, this ability of CLR to grok names with whitespaces is used for a long time by Nemerle guys in their unit-testing DSL (their site seems to be down but contents can be found in google cache, for example).

Yuri Korchyomkin
15 Feb 2008
05:50 AM
Yuri Korchyomkin

Yes, this ability of CLR to grok names with whitespaces is used for a long time by Nemerle guys in their unit-testing DSL (their site seems to be down but contents can be found in google cache, for example).

Anders
15 Feb 2008
10:55 AM
Anders

Do you have a feed for the comments on your blog Oren?

Ayende Rahien
15 Feb 2008
11:39 AM
Ayende Rahien

Andres,

Not that I know of.

If SubText has it, then probably

yitzchok
15 Feb 2008
18:27 PM
yitzchok

That's nice is there any way to call it from C#?

Ayende Rahien
15 Feb 2008
18:58 PM
Ayende Rahien

Not really, no.

VB probably can, though

Thomas Danecker
16 Feb 2008
12:58 PM
Thomas Danecker

You can also call it by C# code, just use something like administrators\u0020can\u0020always\u0020login. C# allows unicode escapes in identifier names. See the language specification ECMA-334, section 9.4.2 Identifiers. This is a valid example from this section:

class @class

{

public static void @static(bool @bool) {

if (@bool)

System.Console.WriteLine("true");

else

System.Console.WriteLine("false");

}

}

class Class1

{

static void M() {

cl\u0061ss.st\u0061tic(true);

}

}

Ayende Rahien
16 Feb 2008
13:01 PM
Ayende Rahien

Thomas,

Thanks, it is good to know.

Scary as hell, too.

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