Allowing Python-style invocation of forward()

[NiklasGustafsson]

We can, in limited situations, support Python-style invocation of modules, i.e. module(t) instead of module.forward(t) by introducing:

public static implicit operator Func<Tensor, Tensor>(Module module)
{
    return (Tensor input) => module.forward(input);
}

It would only work in situations where the module is converted to a function reference, such as a call or variable assignment, not directly in an expression.

In other words, this would work:

Func<Tensor,Tensor> rel = ReLU();
x = rel(t);

but not this:

var rel = ReLU();
x = rel(t);

Is this silly or useful?

[lostmsu]

IMHO, it would be better to overload some operator a la piping.