Re: Copy constructor not called

From:
"Alf P. Steinbach" <alfps@start.no>
Newsgroups:
comp.lang.c++.moderated
Date:
6 Nov 2006 19:14:42 -0500
Message-ID:
<4r9h51Fpnc7uU1@mid.individual.net>
* Christoph Bartoschek:

the copy construcotr I provided for the following class is not [called].
Instead I think that a compiler generated one is used. Can anyone give me a
hint why this is the case?

#include <iostream>

class P {};

template <typename T> class Type {
public:
   Type() { std::cerr << "Default constructor: " << this << std::endl; }

   template <typename U> Type(Type<U> const & other)
   { std::cerr << "Copy constructor: " << this << std::endl; }


A templated constructor is not a copy constructor, by definition.

   ~Type() { std::cerr << "Destructor: " << this << std::endl; }
};

int main() {
    Type<P> src;
    Type<P> tgt(src);
}


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