• Michael Mittner (21/21) Nov 26 2009 Hi!
• Ary Borenszweig (7/35) Nov 26 2009 Hi Mike,
• Michael Mittner (10/17) Nov 26 2009 Further investigation indicates that I have stumbled upon this bug:

Michael Mittner <m.mittner shebang.at> writes:

Hi!

I'm trying to do something like this (in D1):

class Foo
{
    // ...
}

class Bar(T) : Foo
{
    // ...
}

alias Bar!(int) IntBar;
alias Bar!(Mars) MarsBar;

void main()
{
    Foo x = new MarsBar();
}

Common base class, one derived template class and a bunch of aliases that 
are then actually used in the code. But it seems like deriving a template 
class from a non-template one doesn't work. Is this supposed to work, am I 
doing something wrong or am I out of luck here?

-Mike

Ary Borenszweig <ary esperanto.org.ar> writes:

Michael Mittner wrote:
 Hi!
 
 I'm trying to do something like this (in D1):
 
 class Foo
 {
     // ...
 }
 
 class Bar(T) : Foo
 {
     // ...
 }
 
 alias Bar!(int) IntBar;
 alias Bar!(Mars) MarsBar;
 
 void main()
 {
     Foo x = new MarsBar();
 }
 
 Common base class, one derived template class and a bunch of aliases that 
 are then actually used in the code. But it seems like deriving a template 
 class from a non-template one doesn't work. Is this supposed to work, am I 
 doing something wrong or am I out of luck here?
 
 -Mike

Hi Mike,

Why do you mean with "doesn't work"? If I define class Mars {} and 
compile your program it gives no error. Can you show the error the 
compiler is giving you? (you normally past the compiler output if a 
program doesn't compile so that others can help you faster... but in 
case it compiles, weird :-P)

Michael Mittner <m.mittner shebang.at> writes:

Ary Borenszweig wrote:

 Hi Mike,
 
 Why do you mean with "doesn't work"? If I define class Mars {} and
 compile your program it gives no error. Can you show the error the
 compiler is giving you? (you normally past the compiler output if a
 program doesn't compile so that others can help you faster... but in
 case it compiles, weird :-P)

Further investigation indicates that I have stumbled upon this bug:

http://d.puremagic.com/issues/show_bug.cgi?id=1538

Which seems to have been fixed in 1.047 or so, but I'm using 1.041 (the one 
that came with Tango) and I'm too lazy to update now (actually I'm not, but 
I fear this will be half an eternity of trial-and-error to get that build 
environment updated on both Linux and Windows - I'll rather wait for the 
next bundle from the Tango devs).

Thanks for confirming that it should actually work!

-Mike