package utils import ( "golang.org/x/exp/constraints" ) type Range[T constraints.Ordered] struct { start T end T } func NewRange[T constraints.Ordered](start, end T) Range[T] { if start > end { return Range[T]{ start: end, end: start, } } return Range[T]{ start: start, end: end, } } func (r Range[T]) Contains(t T) bool { return t >= r.start && t <= r.end } func (r Range[T]) LeftContains(t T) bool { return t >= r.start && t < r.end } func (r Range[T]) RightContains(t T) bool { return t > r.start && t <= r.end } func (r Range[T]) Start() T { return r.start } func (r Range[T]) End() T { return r.end }