From afa8fff31ab1382a2326c8c7605552f1df2ab066 Mon Sep 17 00:00:00 2001
From: Paul Hauner <paul@paulhauner.com>
Date: Mon, 13 May 2019 14:14:40 +1000
Subject: [PATCH] Remove old `tree_hash_vector` file

---
 eth2/types/src/lib.rs              |   2 -
 eth2/types/src/tree_hash_vector.rs | 142 -----------------------------
 2 files changed, 144 deletions(-)
 delete mode 100644 eth2/types/src/tree_hash_vector.rs

diff --git a/eth2/types/src/lib.rs b/eth2/types/src/lib.rs
index c6109e166..79981c890 100644
--- a/eth2/types/src/lib.rs
+++ b/eth2/types/src/lib.rs
@@ -27,7 +27,6 @@ pub mod pending_attestation;
 pub mod proposer_slashing;
 pub mod slashable_attestation;
 pub mod transfer;
-// pub mod tree_hash_vector;
 pub mod voluntary_exit;
 #[macro_use]
 pub mod slot_epoch_macros;
@@ -66,7 +65,6 @@ pub use crate::slashable_attestation::SlashableAttestation;
 pub use crate::slot_epoch::{Epoch, Slot};
 pub use crate::slot_height::SlotHeight;
 pub use crate::transfer::Transfer;
-// pub use crate::tree_hash_vector::TreeHashVector;
 pub use crate::validator::Validator;
 pub use crate::voluntary_exit::VoluntaryExit;
 
diff --git a/eth2/types/src/tree_hash_vector.rs b/eth2/types/src/tree_hash_vector.rs
deleted file mode 100644
index 2600ff62f..000000000
--- a/eth2/types/src/tree_hash_vector.rs
+++ /dev/null
@@ -1,142 +0,0 @@
-use crate::test_utils::{RngCore, TestRandom};
-use cached_tree_hash::CachedTreeHash;
-use serde_derive::{Deserialize, Serialize};
-use ssz::{Decodable, DecodeError, Encodable, SszStream};
-use std::ops::{Deref, DerefMut};
-use tree_hash::TreeHash;
-
-#[derive(Debug, PartialEq, Clone, Serialize, Deserialize)]
-pub struct TreeHashVector<T>(Vec<T>);
-
-impl<T> From<Vec<T>> for TreeHashVector<T> {
-    fn from(vec: Vec<T>) -> TreeHashVector<T> {
-        TreeHashVector(vec)
-    }
-}
-
-impl<T> Into<Vec<T>> for TreeHashVector<T> {
-    fn into(self) -> Vec<T> {
-        self.0
-    }
-}
-
-impl<T> Deref for TreeHashVector<T> {
-    type Target = Vec<T>;
-
-    fn deref(&self) -> &Vec<T> {
-        &self.0
-    }
-}
-
-impl<T> DerefMut for TreeHashVector<T> {
-    fn deref_mut(&mut self) -> &mut Vec<T> {
-        &mut self.0
-    }
-}
-
-impl<T> tree_hash::TreeHash for TreeHashVector<T>
-where
-    T: TreeHash,
-{
-    fn tree_hash_type() -> tree_hash::TreeHashType {
-        tree_hash::TreeHashType::Vector
-    }
-
-    fn tree_hash_packed_encoding(&self) -> Vec<u8> {
-        unreachable!("Vector should never be packed.")
-    }
-
-    fn tree_hash_packing_factor() -> usize {
-        unreachable!("Vector should never be packed.")
-    }
-
-    fn tree_hash_root(&self) -> Vec<u8> {
-        tree_hash::impls::vec_tree_hash_root(self)
-    }
-}
-
-impl<T> CachedTreeHash for TreeHashVector<T>
-where
-    T: CachedTreeHash + TreeHash,
-{
-    fn new_tree_hash_cache(
-        &self,
-        depth: usize,
-    ) -> Result<cached_tree_hash::TreeHashCache, cached_tree_hash::Error> {
-        let (cache, _overlay) = cached_tree_hash::vec::new_tree_hash_cache(self, depth)?;
-
-        Ok(cache)
-    }
-
-    fn tree_hash_cache_schema(&self, depth: usize) -> cached_tree_hash::BTreeSchema {
-        cached_tree_hash::vec::produce_schema(self, depth)
-    }
-
-    fn update_tree_hash_cache(
-        &self,
-        cache: &mut cached_tree_hash::TreeHashCache,
-    ) -> Result<(), cached_tree_hash::Error> {
-        cached_tree_hash::vec::update_tree_hash_cache(self, cache)?;
-
-        Ok(())
-    }
-}
-
-impl<T> Encodable for TreeHashVector<T>
-where
-    T: Encodable,
-{
-    fn ssz_append(&self, s: &mut SszStream) {
-        s.append_vec(self)
-    }
-}
-
-impl<T> Decodable for TreeHashVector<T>
-where
-    T: Decodable,
-{
-    fn ssz_decode(bytes: &[u8], index: usize) -> Result<(Self, usize), DecodeError> {
-        ssz::decode_ssz_list(bytes, index).and_then(|(vec, i)| Ok((vec.into(), i)))
-    }
-}
-
-impl<U> TestRandom for TreeHashVector<U>
-where
-    U: TestRandom,
-{
-    fn random_for_test(rng: &mut impl RngCore) -> Self {
-        TreeHashVector::from(vec![
-            U::random_for_test(rng),
-            U::random_for_test(rng),
-            U::random_for_test(rng),
-        ])
-    }
-}
-
-#[cfg(test)]
-mod test {
-    use super::*;
-    use tree_hash::TreeHash;
-
-    #[test]
-    pub fn test_cached_tree_hash() {
-        let original = TreeHashVector::from(vec![1_u64, 2, 3, 4]);
-
-        let mut cache = cached_tree_hash::TreeHashCache::new(&original).unwrap();
-
-        assert_eq!(
-            cache.tree_hash_root().unwrap().to_vec(),
-            original.tree_hash_root()
-        );
-
-        let modified = TreeHashVector::from(vec![1_u64, 1, 1, 1]);
-
-        cache.update(&modified).unwrap();
-
-        assert_eq!(
-            cache.tree_hash_root().unwrap().to_vec(),
-            modified.tree_hash_root()
-        );
-    }
-
-}