Enum std::collections::Bound  
            
                [−]
            
        [src]
pub enum Bound<T> {
    Included(T),
    Excluded(T),
    Unbounded,
}Unstable
An endpoint of a range of keys.
Variants
Included | Unstable An inclusive bound.  | 
Excluded | Unstable An exclusive bound.  | 
Unbounded | Unstable An infinite endpoint. Indicates that there is no bound in this direction.  |