--[test.d]--
class A {
public:
	void bar() {
		foo();
	}
private:
	abstract void foo();
}

class B : A {
private:
	void foo() {
	}
}

void main() {
	B b;
}


D:\D\src\build\temp>dmd test.d
d:\D\dmd\bin\..\..\dm\bin\link.exe test,,,user32+kernel32/noi;
OPTLINK (R) for Win32  Release 7.50B1
Copyright (C) Digital Mars 1989 - 2001  All Rights Reserved

test.obj(test)
 Error 42: Symbol Undefined _D4test1A3fooFZv
--- errorlevel 1

This is supposed to delcare an abstract class A which B is derived from filling in the missing functions. What am I doing wrong?

Regan.

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In article <opr922soyy5a2sq9@digitalmars.com>, Regan Heath says...

> What am I doing wrong?
>

This (I think)...

>private:
>	abstract void foo();

"private" means CANNOT be inherited. "abstract" means MUST be inherited. The two don't go together. Try changing "private" to "protected".

Arcane Jill

In article <cbdul8$402$1@digitaldaemon.com>, Arcane Jill says...
>
>In article <opr922soyy5a2sq9@digitalmars.com>, Regan Heath says...
>
>> What am I doing wrong?
>
>This (I think)...
>
>>private:
>>	abstract void foo();
>
>"private" means CANNOT be inherited. "abstract" means MUST be inherited. The two don't go together. Try changing "private" to "protected".

Really?  This is a pretty common construct in C++ as a means to separate interface from implementation.  I had assumed this was a compiler error.

Sean

On Thu, 24 Jun 2004 07:08:24 +0000 (UTC), Arcane Jill <Arcane_member@pathlink.com> wrote:

> In article <opr922soyy5a2sq9@digitalmars.com>, Regan Heath says...
>
>> What am I doing wrong?
>>
>
> This (I think)...
>
>> private:
>> 	abstract void foo();
>
> "private" means CANNOT be inherited. "abstract" means MUST be inherited. The two
> don't go together. Try changing "private" to "protected".

I'll give it a go, I was trying to say that foo must be inherited as a private method.
Regan.

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On Fri, 25 Jun 2004 09:25:46 +1200, Regan Heath <regan@netwin.co.nz> wrote:

> On Thu, 24 Jun 2004 07:08:24 +0000 (UTC), Arcane Jill <Arcane_member@pathlink.com> wrote:
>
>> In article <opr922soyy5a2sq9@digitalmars.com>, Regan Heath says...
>>
>>> What am I doing wrong?
>>>
>>
>> This (I think)...
>>
>>> private:
>>> 	abstract void foo();
>>
>> "private" means CANNOT be inherited. "abstract" means MUST be inherited. The two
>> don't go together. Try changing "private" to "protected".
>
> I'll give it a go, I was trying to say that foo must be inherited as a private method.
> Regan.

Ok, it works. But.. this is valid C++

class A {
public:
	void bar() {
		foo();
	}
protected:
private:
	virtual void foo() = 0;
};

class B : A {
public:
protected:
private:
	void foo() {
	}
};

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


and the D I wrote, IMO equivalent to the above, and does not work:

--[test.d]--
class A {
public:
	void bar() {
		foo();
	}
private:
	abstract void foo();
}

class B : A {
private:
	void foo() {
}
}

void main() {
	B b;
}

D:\D\src\build\temp>dmd test.d
d:\D\dmd\bin\..\..\dm\bin\link.exe test,,,user32+kernel32/noi;
OPTLINK (R) for Win32  Release 7.50B1
Copyright (C) Digital Mars 1989 - 2001  All Rights Reserved

test.obj(test)
 Error 42: Symbol Undefined _D4test1A3fooFZv
--- errorlevel 1

So I think this is a bug.

Regan.

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