err

error: no method named `max_elem` found for type `[{integer}; 6]` in the current scope
  --> src/max_elem.rs:34:17
   |
34 |   		let m = array.max_elem();
   |   		              ^^^^^^^^
   |
   = help: items from traits can only be used if the trait is implemented and in scope; the following trait defines an item `max_elem`, perhaps you need to implement it:
   = help: candidate #1: `max_elem::MaxElem`

error: aborting due to previous error

Build failed, waiting for other jobs to finish...
error: Could not compile `algorithms_in_a_nutshell`.

impl.rs

trait MaxElem<T> {
	fn max_elem<'a>(&'a self) -> &'a T;
}

impl<'u, T> MaxElem<T> for &'u [T] where T: Ord {
	fn max_elem<'a>(&'a self) -> &'a T {
		max_elem_helper(self, 0, self.len())
	}
}


fn max_elem_helper<'a, T>(vec: &'a &[T], left: usize, right: usize) -> &'a T 
	where T: Ord
{
	if right - left == 1 {
		return &vec[left];
	}
	let mid = (left + right) / 2;
	let max1 = max_elem_helper(vec, left, mid);
	let max2 = max_elem_helper(vec, mid, right);
	if max1 > max2 {
		max1
	} else {
		max2
	}
}

#[cfg(test)]
mod test {
	use max_elem::MaxElem;
	#[test]
	fn test_max_elem() {
		let array = [11, 2, 9, 1, 3, 88]; 
		let m = array.max_elem(); 
		assert_eq!(m, 88);
	}
}