pub struct INode {
mut:
	heapindex u64
}

pub struct IHeap[T] {
mut:
	array []&T
	size  u64
}

pub fn create_iheap[T](capacity int) &IHeap[T] {
	mut h := &IHeap[T]{
		array: []&T{cap: capacity}
		size:  0
	}
	h.array << &T(unsafe { nil })
	return h
}

fn (mut h IHeap[T]) percolateup(hl u64, mut element T) {
	mut hole := hl
	for hole > 1 && element < h.array[int(hole / 2)] {
		// ^ Notice that '<' was not defined
		println("didnt define '<' for the INode")
		hole /= 2
	}
}

fn main() {
	heap := create_iheap[INode](3000000)
	println(heap)
}