Re: How to assign RefType parameter in Jimple?

[Ondrej Lhotak <olhotak@sable.mcgill.ca>]

It sounds like you are looking for out parameters. Java does not have
them. All parameters are passed by value, and only into the method; you
cannot use them to pass values out.

Ondrej


On Wed, Jun 04, 2003 at 11:37:26PM +0200, Richard Stahl wrote:
> Hello,
> 
> I would like to know how is it possible to find a corespondence between 
> the local RefType variable and parameter variable if I would like to 
> assign from local to parameter?
> 
> Example:
> 
> JAVA code:
> 
>    private Row exchange;
> 
>    public void setRow(Row row) {
>      Row r = exchange;
>      r = row;
>    }
> 
>    public void getRow(Row row) {
>      row = exchange;
>    }
> 
> and corresponding JIMPLE code:
> 
>    public void setRow(Row )
>    {
>      Producer r0;
>      Row r1, r2, r3;
> 
>      r0 := @this: Producer;
>      r1 := @parameter0: Row;
>      r2 = r0.<PC: Row exchange>;
>      r3 = r1;
>      return;
>    }
> 
>    public void getRow(Row )
>    {
>      Producer r0;
>      Row r1, r2;
> 
>      r0 := @this: Producer;
>      r1 := @parameter0: Row;
>      r2 = r0.<PC: Row exchange>;
>      return;
>    }
> 
> method setRow set the actual Row to the parameter type yet I can not see 
> the relation between r3 and r2 in the code!
> 
> method getRow assigns the parameter ref the Row from this object yet 
> (again) I can not see the relation between r2 and r1 (which is returned)!
> 
> I hope I make the problem understandable. Please, do not look at its 
> usability - it is useless, i.e., I use it for testing purposes.
> 
> Thank you very much in advance.
> 
> Best regards,
> 
> Richard
>