• vathixSpamFix dprogramming.com (Vathix) May 07 2004
• Andy Friesen <andy ikagames.com> May 07 2004
• vathixSpamFix dprogramming.com (Vathix) May 07 2004
• Stewart Gordon <smjg_1998 yahoo.com> May 10 2004
• "Matthew" <matthew.hat stlsoft.dot.org> May 11 2004

vathixSpamFix dprogramming.com (Vathix) writes:

If a class is defined as auto, I am unable to keep an instance alive longer 
than its scope. I would like there to be a way to specify non-auto. Most of the 
time I want to immediately destruct a memory mapped file, but sometime I might 
want to keep it around for awhile; I'd have to rewrite or modify the code!

--
Christopher E. Miller

Andy Friesen <andy ikagames.com> writes:

Vathix wrote:
 If a class is defined as auto, I am unable to keep an instance alive longer 
 than its scope. I would like there to be a way to specify non-auto. Most of
the 
 time I want to immediately destruct a memory mapped file, but sometime I might 
 want to keep it around for awhile; I'd have to rewrite or modify the code!


You're right, they are.  On the bright side, you don't have to use auto 
that way.  Just write the class itself as non-auto, and use auto 
instances as needed.

This is perfectly legal:

     class A {
         ...
     }

     A foo() {
         auto A a = new A();
         A b = new A();

         // a should be cleaned up when the function is done, b will not,
         // as it was not declared as auto
         return b;
     }

  -- andy

vathixSpamFix dprogramming.com (Vathix) writes:

In article <c7ggfk$v9r$1 digitaldaemon.com>, andy ikagames.com says...
This is perfectly legal:

     class A {
         ...
     }

     A foo() {
         auto A a = new A();
         A b = new A();

         // a should be cleaned up when the function is done, b will not,
         // as it was not declared as auto
         return b;
     }

  -- andy


Right, but I mean when using someone else's code; like std.mmfile.MmFile is 
auto, so I'm stuck with an auto class, or I have to use my own code. (By the 
way, when I click std.mmfile at the top of phobos.html, it doesn't scroll down 
to it because the <A> tag is incorrect.)


-- 
Christopher E. Miller

Stewart Gordon <smjg_1998 yahoo.com> writes:

Vathix wrote:

 In article <c7ggfk$v9r$1 digitaldaemon.com>, andy ikagames.com says...
 
This is perfectly legal:

    class A {
        ...
    }

    A foo() {
        auto A a = new A();
        A b = new A();

        // a should be cleaned up when the function is done, b will not,
        // as it was not declared as auto
        return b;
    }

 -- andy


 
 Right, but I mean when using someone else's code; like std.mmfile.MmFile is 
 auto, so I'm stuck with an auto class, or I have to use my own code. (By the 
 way, when I click std.mmfile at the top of phobos.html, it doesn't scroll down 
 to it because the <A> tag is incorrect.)


I don't see why that particular class has to be auto either.  Why should 
an mmfile have to have function-local scope whether the programmer likes 
it or not?

I suppose a possible workaround is to wrap the mmfile in a thread....

Stewart.

-- 
My e-mail is valid but not my primary mailbox, aside from its being the 
unfortunate victim of intensive mail-bombing at the moment.  Please keep 
replies on the 'group where everyone may benefit.

"Matthew" <matthew.hat stlsoft.dot.org> writes:

"Stewart Gordon" <smjg_1998 yahoo.com> wrote in message
news:c7o59r$2u8c$1 digitaldaemon.com...
 Vathix wrote:

 In article <c7ggfk$v9r$1 digitaldaemon.com>, andy ikagames.com says...

This is perfectly legal:

    class A {
        ...
    }

    A foo() {
        auto A a = new A();
        A b = new A();

        // a should be cleaned up when the function is done, b will not,
        // as it was not declared as auto
        return b;
    }

 -- andy



 Right, but I mean when using someone else's code; like std.mmfile.MmFile is
 auto, so I'm stuck with an auto class, or I have to use my own code. (By the
 way, when I click std.mmfile at the top of phobos.html, it doesn't scroll




 to it because the <A> tag is incorrect.)


 I don't see why that particular class has to be auto either.  Why should
 an mmfile have to have function-local scope whether the programmer likes
 it or not?


That was the way Walter wanted it, and it seemed ok to me at the time. I concur
that it should probably not be.

Perhaps one of you could post is as a bug on the bugs NG, and we'll fix it for
next time?

 I suppose a possible workaround is to wrap the mmfile in a thread....

 Stewart.

 -- 
 My e-mail is valid but not my primary mailbox, aside from its being the
 unfortunate victim of intensive mail-bombing at the moment.  Please keep
 replies on the 'group where everyone may benefit.