Re: Threads across programming languages

On 02/05/2024 17:10, Bonita Montero wrote:

Am 02.05.2024 um 15:53 schrieb David Brown:
 

That is a /long/ way from treating functions as first-class objects.

 A C-style function is also a function-object in C++ because it has
a calling operator.

No it is not.  C-style functions (or C++ functions for that matter) are not objects, and do not have calling operators.  Built-in operators do not belong to a type, in the way that class operators do.

 

But it is certainly a step in that direction, as are lambdas.

 Lambdas can be assigned to function<>-object to make them runtime
-polymorphic. Otherwise they can be generic types, which are compile
-time polymorphic - like the function-object for std::sort();
 

You missed the point entirely.  Lambdas can be used in many ways like functions, and it is possible for one function (or lambda) to return a different function, and can be used for higher-order functions (functions that have functions as parameters or return types).  They do not mean that C++ can treat functions as first-class objects, but they /do/ mean that you can get many of the effects you might want if C++ functions really were first-class objects.

You also claimed that classes are first-class objects in C++.

 I never said that and having sth. like class Class in Java is
beyond C++'s performance constraints.

You repeatedly replied to Lawrence's posts confirming that you believed they were.  (Re-read your posts in this thread.)  I was fairly sure you were making completely unsubstantiated claims, but it was always possible you had thought of something interesting.
I like C++, but it is absurd and unhelpful to claim it is something that it is not.  Neither functions nor classes are first-class objects in C++.  C++ is not, by any stretch of the imagination, a "fully featured functional programming language".  It supports some functional programming techniques, which is nice, but that does not make it a functional programming language.