Can external static method modify the global variable defined in CSP#?

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Can external static method modify the global variable defined in CSP#?

Post  alex2ren on Sun Jan 20, 2013 2:37 pm

I write the following code in CSP#.
Code:
#import "PAT.Lib.List";
#import "Mylib";
var g = 0;
P = a{call(inc, g);} ->  b{call(inc, g);} -> c{call(inc, g);} -> d{call(inc, g);} -> Skip;

The "Mylib.cs" goes as follows
Code:
using System;
using System.Collections.Generic;
using System.Text;
//the namespace must be PAT.Lib, the class and method names can be arbitrary
namespace PAT.Lib
{
    public class NewLib
    {
         public static int inc(ref int v)
        {
              v = v+1;
              return v;
        }
    }
}

Everything works fine except the fact that inc cannot actually modify the value of g. Can external static method modify the global variable defined in CSP#? Thanks.

alex2ren

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Join date : 2012-12-03

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Re: Can external static method modify the global variable defined in CSP#?

Post  pat team on Fri Jan 25, 2013 12:22 am

The primitive value (like int, bool) passed into the C# call is by value so even when you put ref in the method, it will not help. One way to solve this problem is to just do this: g = call(inc, g)

if the value passed in is an object, the update will be shown


alex2ren wrote:I write the following code in CSP#.
Code:
#import "PAT.Lib.List";
#import "Mylib";
var g = 0;
P = a{call(inc, g);} ->  b{call(inc, g);} -> c{call(inc, g);} -> d{call(inc, g);} -> Skip;

The "Mylib.cs" goes as follows
Code:
using System;
using System.Collections.Generic;
using System.Text;
//the namespace must be PAT.Lib, the class and method names can be arbitrary
namespace PAT.Lib
{
    public class NewLib
    {
         public static int inc(ref int v)
        {
              v = v+1;
              return v;
        }
    }
}

Everything works fine except the fact that inc cannot actually modify the value of g. Can external static method modify the global variable defined in CSP#? Thanks.

pat team
Admin

Posts : 17
Join date : 2010-02-15

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