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D - Bug: "class B forward reference of base class A"

reply Andy Friesen <andy ikagames.com> writes:
Maybe this has been posted before, but I don't recall anybody managing 
to isolate this into a handful of lines of code, so I may as well post 
it now. (apologies if it has already been posted)

a.d:
	import b;

	class A
	{
	    B[] b;
	}

b.d:
	import a;

	class B : A
	{
	}


D:\temp\dtest>dmd a.d b.d
b.d: class B forward reference of base class A

  -- andy
Jan 19 2004
parent reply Ant <duitoolkit yahoo.ca> writes:
On Mon, 19 Jan 2004 18:45:19 -0800, Andy Friesen wrote:


 Maybe this has been posted before, but I don't recall anybody managing 
 to isolate this into a handful of lines of code, so I may as well post 
 it now. (apologies if it has already been posted)
 
 a.d:
 	import b;
 
 	class A
 	{
 	    B[] b;
 	}
 
 b.d:
 	import a;
 
 	class B : A
 	{
 	}
 
 
 D:\temp\dtest>dmd a.d b.d
 b.d: class B forward reference of base class A
 
   -- andy



I was going to suggest:
#################
module A;
 
class A
{
 	private import B;
    B b;
}
#################
module B;

import A;
 
class B : A
{
}
#################
but that kinda segfaults the compiler (0.78)
even if we remove the "module" statments.

which if funny because the test I done before
works fine:
#################
class A
{
	private import std.string;
	
	void a()
	{
		printf("A.a std.string.toString(1)== %.*s\n",std.string.toString(1));
	}
}

#################
private import ImpA;

class B 
{
	private import std.string;
	void b()
	{
		printf("B.b std.string.toString(2)== %.*s\n",std.string.toString(2));
	}
}

void main()
{
	B b = new B;
	b.b();
}

#################

Ant
Jan 19 2004
parent reply Ant <duitoolkit yahoo.ca> writes:
On Mon, 19 Jan 2004 22:08:38 -0500, Ant wrote:

ok forget the second test.
I guess it was to test something else.
I have a directory full of these simple tests...

Ant
Jan 19 2004
parent reply Ant <duitoolkit yahoo.ca> writes:
On Mon, 19 Jan 2004 22:11:06 -0500, Ant wrote:


 On Mon, 19 Jan 2004 22:08:38 -0500, Ant wrote:
 
 ok forget the second test.
 I guess it was to test something else.
 I have a directory full of these simple tests...
 
 Ant



OK I went back to that second test.

If class B : A
still compiles which shows the point I was trying to make.

if class B : A (again) and remove the import std.string
from class B the it still compiles and ouputs 
"B.b std.string.toString(2)== 2"

that shows that the "private" in "private import std.string"
inside the body definition of A is not respected in B

Ant
Jan 19 2004
parent Lars Ivar Igesund <larsivar igesund.net> writes:
Ant wrote:

 On Mon, 19 Jan 2004 22:11:06 -0500, Ant wrote:
 
 

On Mon, 19 Jan 2004 22:08:38 -0500, Ant wrote:

ok forget the second test.
I guess it was to test something else.
I have a directory full of these simple tests...

Ant



 
 OK I went back to that second test.
 
 If class B : A
 still compiles which shows the point I was trying to make.
 
 if class B : A (again) and remove the import std.string
 from class B the it still compiles and ouputs 
 "B.b std.string.toString(2)== 2"
 
 that shows that the "private" in "private import std.string"
 inside the body definition of A is not respected in B
 
 Ant
 



I also reported on this with minimal examples some time ago.

Disrespect of the 'private' keyword for modules seemed to be
the main problem.

Lars Ivar Igesund
Jan 20 2004