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extern crate debugit;
#[macro_use]
extern crate mopa;
use std::{cmp, fmt, hash, ops};
use std::any::TypeId;
#[derive(Debug)]
pub struct HasherMut<H: ?Sized>(H);
impl<H: ops::DerefMut + ?Sized> hash::Hasher for HasherMut<H>
where H::Target: hash::Hasher
{
fn finish(&self) -> u64 {
self.0.finish()
}
fn write(&mut self, bytes: &[u8]) {
self.0.write(bytes)
}
}
pub trait AnyHash: mopa::Any {
fn debug(&self, f: &mut fmt::Formatter) -> fmt::Result;
fn eq(&self, other: &AnyHash) -> bool;
fn hash(&self, hasher: &mut hash::Hasher);
}
mopafy!(AnyHash);
impl<T: Eq + hash::Hash + 'static> AnyHash for T {
fn debug(&self, f: &mut fmt::Formatter) -> fmt::Result {
f.debug_tuple("AnyHash")
.field(&TypeId::of::<Self>())
.field(&debugit::DebugIt(self))
.finish()
}
fn eq(&self, other: &AnyHash) -> bool {
match other.downcast_ref::<Self>() {
None => false,
Some(other) => self == other,
}
}
fn hash(&self, hasher: &mut hash::Hasher) {
hash::Hash::hash(&(TypeId::of::<Self>(), self), &mut HasherMut(hasher))
}
}
impl fmt::Debug for AnyHash {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
self.debug(f)
}
}
impl PartialEq for AnyHash {
fn eq(&self, other: &AnyHash) -> bool {
AnyHash::eq(self, other)
}
}
impl Eq for AnyHash {}
impl hash::Hash for AnyHash {
fn hash<H: hash::Hasher>(&self, hasher: &mut H) {
AnyHash::hash(self, hasher)
}
}
pub trait AnyOrd: mopa::Any {
fn debug(&self, f: &mut fmt::Formatter) -> fmt::Result;
fn eq(&self, other: &AnyOrd) -> bool;
fn cmp(&self, other: &AnyOrd) -> cmp::Ordering;
}
mopafy!(AnyOrd);
impl<T: Ord + 'static> AnyOrd for T {
fn debug(&self, f: &mut fmt::Formatter) -> fmt::Result {
f.debug_tuple("AnyOrd")
.field(&TypeId::of::<Self>())
.field(&debugit::DebugIt(self))
.finish()
}
fn eq(&self, other: &AnyOrd) -> bool {
match other.downcast_ref::<Self>() {
None => false,
Some(other) => self == other,
}
}
fn cmp(&self, other: &AnyOrd) -> cmp::Ordering {
match other.downcast_ref::<Self>() {
None => Ord::cmp(&TypeId::of::<Self>(), &mopa::Any::get_type_id(other)),
Some(other) => self.cmp(other),
}
}
}
impl fmt::Debug for AnyOrd {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
self.debug(f)
}
}
impl PartialEq for AnyOrd {
fn eq(&self, other: &AnyOrd) -> bool {
AnyOrd::eq(self, other)
}
}
impl Eq for AnyOrd {}
impl PartialOrd for AnyOrd {
fn partial_cmp(&self, other: &AnyOrd) -> Option<cmp::Ordering> {
Some(self.cmp(other))
}
}
impl Ord for AnyOrd {
fn cmp(&self, other: &AnyOrd) -> cmp::Ordering {
AnyOrd::cmp(self, other)
}
}