Incorrect cloning of CXX operator overloads with non-reference return types

[vgvassilev]

#include "clad/Differentiator/Differentiator.h"
#include <iostream>
#define show(x) std::cout << #x << ": " << x << "\n";

class Identity {
    public:
    double operator()(double u) { return u; }
};

template<class F>
double algo(F f, double x) {
    double val = f(x);
    return val * val;
}

int main() {
    auto grad = clad::gradient(algo<Identity>);
    double x=3, dx=0;
    Identity di;
    grad.execute(Identity(), x, &di, &dx);
    show(dx); // This prints: x: 6
}

See #637 (comment)

[guitargeek]

Hi! Sorry, I think I got something wrong when I made my comment, and this is actually the problem that was fixed by:
#645

[vgvassilev]

@guitargeek so we can close this one?

[guitargeek]

Yes. Sorry, I confused something here!