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Re: [K-user] Unsupported sort of fresh variable

From: Andrei Stefanescu <andreistef AT gmail.com>
To: Omar Duhaiby <3omarz AT gmail.com>
Cc: "k-user AT cs.uiuc.edu" <k-user AT cs.uiuc.edu>, "Musab A. AlTurki" <musab AT kfupm.edu.sa>
Subject: Re: [K-user] Unsupported sort of fresh variable
Date: Mon, 17 Nov 2014 11:40:41 -0600
List-archive: <http://lists.cs.uiuc.edu/pipermail/k-user/>
List-id: <k-user.cs.uiuc.edu>

Hi Omar,

The !X notation is syntactic sugar for a function that generates a "fresh" element given an integer argument. This is the function for Id (from builtins/id.k):

syntax Id ::= freshId(Int) [freshGenerator, function]

rule freshId(I:Int) => String2Id("_" +String Int2String(I))

You can add you own for LowerCaseId in a similar way.

Let me know if I can help you further,

Andrei

On Sat, Nov 15, 2014 at 11:56 AM, Omar Duhaiby <3omarz AT gmail.com> wrote:

Hello,

I'm doing this:
rule E:Exp (0) => E -> !NewVar:LowerCaseId [macro]

However, the compiler says "Only sorts [Id, Int] admit fresh variables". But I don't want to use Id because it can start with an upper case. My LowerCaseId starts only with a lower case. What should I do?

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[K-user] Unsupported sort of fresh variable, Omar Duhaiby, 11/15/2014
- Re: [K-user] Unsupported sort of fresh variable, Andrei Stefanescu, 11/17/2014
  - Re: [K-user] Unsupported sort of fresh variable, Omar Duhaiby, 11/17/2014
    - Re: [K-user] Unsupported sort of fresh variable, Andrei Stefanescu, 11/17/2014
      - Re: [K-user] Unsupported sort of fresh variable, Omar Duhaiby, 11/18/2014