Re: [Vala] Concatenating strings..

[Andrea Del Signore <sejerpz tin it>]

On Sat, 2008-02-16 at 11:43 -0800, Shawn Ferris wrote:
> Hey All -- I'm new to vala and while I've wanted to learn C, I just haven't had a need for it. I'm an 
> Oracle DBA and perl+dbi suites me very well. But, alas, I want to take the plunge and would like to write 
> some gnome applications. I've come quite accustomed to writing OO-Perl and I had been looking at C# because 
> the syntax looked very logical to me. But then I ran into vala and gotta say, this is the direction I see 
> myself going for two reasons.. Again, the syntax looks logical and in the end, it generates C so I'll get 
> more fimiliar with that as well. Best of both worlds. 8D
>
> That being said.. I'm sure I will have a ton of obvious questions... such as, string concatenation.. I'm 
> trying this:
>
> public class SMF : GLib.Object {
>
>   private const string FOO  = "foo";
>   private const string BAR  = "bar";
>   private const string BAZ  = FOO + BAR;
>
>   public static int main () {
>  
>     message(BAZ);
>
>     return 0;
>   }
> }
>
> And you'll probably guess that my error is:
>
>   error: invalid operands to binary +
>
> And if I try:
>
>   private const string BAZ  = "%s %s".printf(FOO, BAR);
>
> I get:
>
>   error: initializer element is not constant
>
> So.. would someone be so kind as to tell me how this is done? I would appreciate it!
>
> Thx
> SMF 8D
>
>
>
>
>
>
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Hi Shawn,

vala compiler has a bug when you try to use string concatenation
operator in variable initializers (see
http://bugzilla.gnome.org/show_bug.cgi?id=516287)

As a temporary workaround you can write your example like this:

public class SMF : GLib.Object {

  private const string FOO  = "foo";
  private const string BAR  = "bar";
  private string BAZ;

  public static int main () {
 
    BAZ = FOO + BAR;
    message(BAZ);

    return 0;
  }
}

mind that you have lost the const modifier in BAZ ;)

Bye,
A.