any-container 0.1.0

Type-erased container types for storing heterogeneous values behind a common interface.
Documentation 
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use std::hash::Hasher;

// With TypeIds as keys, there's no need to hash them. They are already hashes
// themselves, coming from the compiler. The IdHasher just holds the u64 of
// the TypeId, and then returns it, instead of doing any bit fiddling.
#[derive(Default)]
pub(crate) struct IdHasher(u64);

impl Hasher for IdHasher {
    fn finish(&self) -> u64 {
        self.0
    }

    fn write(&mut self, _: &[u8]) {
        unreachable!("TypeId calls write_u64");
    }

    fn write_u64(&mut self, id: u64) {
        self.0 = id;
    }
}