• Christian Lesage (301/301) Oct 06 2003 Hi folks!
• Lars Ivar Igesund (9/13) Oct 07 2003 instance
• Christian Lesage (37/42) Oct 07 2003 Thanks for replying. I feel like I am closer to the solution. However, t...
• Lars Ivar Igesund (11/14) Oct 07 2003 has

"Christian Lesage" <christian.lesage.1 agora.ulaval.ca> writes:

Hi folks!

D seems to have most important features I want in a language: garbage
collection, strings, dynamic arrays and associative arrays. I've used
scripting
languages until now because they had these features, but I always wished
there was a compiled language which would offer them. Then, I think D
deserves a try.

Easy TCP/IP is another feature I need. Pavel Minayev created the D sockets
library, "a set of classes encapsulating Windows Sockets 2 functionality".
Great. Mike Wynn posted his fixes to this library on January 23, 2003. This
is the file I am reposting here.

Now, here's my problem. Even using Mike's "socket.d", I can't compile
Pavel's example "httpget.d". The compiler yields:

C:\Program Files\DIDE\Projects\httpget\httpget.d(21): cannot create instance
of abstract class TCPSocket

Also, I think that I have to link the whole thing with "ws2_32.lib", but how
can I get this done?

I guess my questions will seem trivial to some of you. However, I would
really appreciate some help. BTW, I'm using DIDE.

Christian Lesage



begin 666 socket.d

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end

"Lars Ivar Igesund" <larsivi stud.ntnu.no> writes:

"Christian Lesage" <christian.lesage.1 agora.ulaval.ca> wrote in message
news:bltn3k$27vo$1 digitaldaemon.com...
 Now, here's my problem. Even using Mike's "socket.d", I can't compile
 Pavel's example "httpget.d". The compiler yields:

 C:\Program Files\DIDE\Projects\httpget\httpget.d(21): cannot create

instance
 of abstract class TCPSocket

There was a recent change in the compiler that disallows instantiation of
abstract
classes. It means that the code must be fixed. You might find more about it
in
the docs.

Lars Ivar Igesund

"Christian Lesage" <christian.lesage.1 agora.ulaval.ca> writes:

 There was a recent change in the compiler that disallows instantiation of
 abstract
 classes. It means that the code must be fixed. You might find more about

it
 in
 the docs.

Thanks for replying. I feel like I am closer to the solution. However, the
documentation doesn't tell much about "abstract" classes.

Yet Another Stupid Question:

What's an "abstract" class? How do you differenciate an "abstract" class
from a "concrete" one? TCPSocket looks like a "concrete" class to me. It has
a polymorphic constructor and a polymorphic member function "connect()".

BTW, I post "httpget.d", just in case somebody feeling particularly generous
have time to look into the problem... ;)



begin 666 HTTPGET.D
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`
end

"Lars Ivar Igesund" <larsivi stud.ntnu.no> writes:

"Christian Lesage" <christian.lesage.1 agora.ulaval.ca> wrote in message
news:bluqpu$q19$1 digitaldaemon.com...
 What's an "abstract" class? How do you differenciate an "abstract" class
 from a "concrete" one? TCPSocket looks like a "concrete" class to me. It

has
 a polymorphic constructor and a polymorphic member function "connect()".

An abstract class is a crossing between an interface and a normal class. The
methods can be implemented (but don't have to be). It should be used on
classes (usually base classes in a hierarchy) that makes no sense to
instantiate,
but that it is nice to have some code that is common for all subclasses.

abstract has the same meaning in Java, an explanation can be found here:
http://java.sun.com/docs/books/tutorial/java/javaOO/abstract.html

Lars Ivar Igesund