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List:       hpux-cxx-dev
Subject:    RE: CXX-DEV: Template instantiation with non-public enum value.
From:       hefin.jones () vf ! vodafone ! co ! uk
Date:       1999-05-25 12:58:05
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> On A.01.18 (and all other versions), both enum and static const cases
> fail.

Really?  The following works fine for me:

-- Number.H --

template< int num >
class Number {
public:
	Number() { };
};

-- Clinet.H --

class Client {
public:
	Client();
private:
	static const int value = 10;
};

-- Client.C --
#include <Client.H>
#include <Number.H>

const int Client::value;

Client::Client() {
	Number< Client::value > num;
}

--

However, if I change value to an enum, e.g.:

-- Clinet.H --

class Client {
public:
	Client();
private:
	enum { value = 10 }
};

-- Client.C --
#include <Client.H>
#include <Number.H>

Client::Client() {
	Number< Client::value > num;
}

--

I get:
Error 558: "Client.C", line 9 # Cannot access private member
    "Client::{unnamed.enum.#1} value".
            Number< Client::value > num;
                    ^^^^^^^^^^^^^       

> A workaround would be to create a local constant expression 
> in Client().

I don't need to do this as either a private static const int, or a public
enum work just fine. A private enum, however, does not. I was curious at to
why.

Thank you.

--
Hefin Jones
Software Developer
Vodafone Ltd. Tel: +441635677277

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