Function grad

pub fn grad<'a, F, Args, Output, Err>(
    f: F,
) -> impl FnMut(Args) -> Result<Output> + 'a
where
    F: IntoGrad<'a, Args, Output, Err>,

Returns a function which computes the gradient of f with the default argument numbers &[0].

See also [grad_with_arg_nums] for a version that allows specifying the argument numbers