//! Extension
use std::ops::{
    RangeBounds,
    Bound
};
pub trait BoundExt<T>
{
    fn map_impl<U, F>(self, f: F) -> Bound<U>
    where F: FnOnce(T) -> U;
}

impl<T> BoundExt<T> for Bound<T>
{
    #[inline(always)] 
    fn map_impl<U, F>(self, f: F) -> Bound<U>
    where F: FnOnce(T) -> U {
	//! Copied from stdlib
	use Bound::*;
	match self {
	    Unbounded => Unbounded,
	    Included(x) => Included(f(x)),
	    Excluded(x) => Excluded(f(x)),
	}
    }
}

#[inline(always)] pub fn erase<T>(_: T) -> () {}

/// Get the memory address this reference points to.
///
/// # Note
/// If `T` is a fat pointer, it is cast to a thin-pointer first.
#[inline(always)] 
pub fn into_addr<T: ?Sized>(r: &T) -> usize
{
    r as *const T as *const std::convert::Infallible as usize
}