Re: [Vala] Abstract properties in Concrete Class

2010-06-10 Thread Luca Bruno 
On Wed, Jun 09, 2010 at 10:25:37PM -0400, tecywiz121 wrote:
 Hello again,
 
 This is the second snippet I was curious about.
 
 Basically, valac should not allow the following code to compile since
 IMHO, its completely wrong.
 
 Just checking whether I should file a bug report or not.
 
 
 
 public class TestClass
 {
   public abstract bool test_prop { get; set; }
 }
 
 public static int main(string[] args)
 {
   TestClass tc = new TestClass();
   
   bool test = tc.test_prop;
   
   stdout.printf(%s\n, test ? TRUE : FALSE);
   return 0;
 }
 

Given class TestSubclass : TestClass overriding test_prop:

TestClass tc = new TestSubclass();
bool test = tc.test_prop;

It's completely right.

You might want to make TestClass an abstract class to not instantiate it,
but problems come on runtime and it's not a compiler failure if you don't
override the property.

-- 
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Re: [Vala] Abstract properties in Concrete Class

2010-06-10 Thread pancake 

Offtopic: why don't you use?

print (test.to_string());

On Jun 10, 2010, at 9:08 AM, Luca Bruno lethalma...@gmail.com wrote:


On Wed, Jun 09, 2010 at 10:25:37PM -0400, tecywiz121 wrote:

Hello again,

This is the second snippet I was curious about.

Basically, valac should not allow the following code to compile since
IMHO, its completely wrong.

Just checking whether I should file a bug report or not.



public class TestClass
{
   public abstract bool test_prop { get; set; }
}

public static int main(string[] args)
{
   TestClass tc = new TestClass();

   bool test = tc.test_prop;

   stdout.printf(%s\n, test ? TRUE : FALSE);
   return 0;
}



Given class TestSubclass : TestClass overriding test_prop:

TestClass tc = new TestSubclass();
bool test = tc.test_prop;

It's completely right.

You might want to make TestClass an abstract class to not  
instantiate it,
but problems come on runtime and it's not a compiler failure if you  
don't

override the property.

--
http://www.debian.org - The Universal Operating System
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Re: [Vala] Abstract properties in Concrete Class

2010-06-10 Thread Jürg Billeter 
Hi,

On Wed, 2010-06-09 at 22:25 -0400, tecywiz121 wrote:
 This is the second snippet I was curious about.
 
 Basically, valac should not allow the following code to compile since
 IMHO, its completely wrong.
 
 Just checking whether I should file a bug report or not.

Yes, this is a bug. valac already reports an error when declaring
abstract methods in concrete classes. It should do the same with
abstract properties.

Jürg

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