When is this kind of tempo deleted?

[doublemaster007]

class Foo;

main{
Foo(); //at ; or end of main?

Foo &x =Foo() //at the end of main right?

Foo x = Foo(5) // This doesnt call copy constructor.. strange!

Foo x = Foo (6,7,8) // Does this call copy constrcutor?

 

[Victor Bazarov]

class Foo;

class Foo {};

main{

int main() {

Foo(); //at ; or end of main?

Nope. Right there at the semicolon.

Foo &x =Foo() //at the end of main right?

Illegal code. A reference to non-const cannot be initialised with a
temporary. A semicolon is missing.

Foo x = Foo(5) // This doesnt call copy constructor.. strange!

Illegal code: a semicolon is missing. 'Foo' doesn't have a constructor
that takes an 'int' argument.

The compiler is allowed to omit copy-construction, but it has to be
accessible (as if it's used).

Foo x = Foo (6,7,8) // Does this call copy constrcutor?

Same thing: no semicolon, no constructor with three arguments. Again,
the same thing: no copy construction is necessary

Learn to post real code.

V