Support custom hashers for HashMap/-Set

Author: Hans Christian Schmitz

src/lib.rs

@@ -45,6 +45,7 @@ use core::time::Duration;
 use std::borrow::{Cow, ToOwned};
 use std::collections::{BTreeMap, BTreeSet, BinaryHeap, HashMap, HashSet, LinkedList, VecDeque};
 use std::ffi::{CString, OsString};
+use std::hash::BuildHasher;
 use std::net::{Ipv4Addr, Ipv6Addr};
 use std::path::PathBuf;
 use std::rc::Rc;
@@ -736,8 +737,8 @@ impl<'a, A: Arbitrary<'a> + Ord> Arbitrary<'a> for BinaryHeap<A> {
     }
 }
 
-impl<'a, K: Arbitrary<'a> + Eq + ::std::hash::Hash, V: Arbitrary<'a>> Arbitrary<'a>
-    for HashMap<K, V>
+impl<'a, K: Arbitrary<'a> + Eq + ::std::hash::Hash, V: Arbitrary<'a>, S: BuildHasher + Default>
+    Arbitrary<'a> for HashMap<K, V, S>
 {
     fn arbitrary(u: &mut Unstructured<'a>) -> Result<Self> {
         u.arbitrary_iter()?.collect()
@@ -753,7 +754,9 @@ impl<'a, K: Arbitrary<'a> + Eq + ::std::hash::Hash, V: Arbitrary<'a>> Arbitrary<
     }
 }
 
-impl<'a, A: Arbitrary<'a> + Eq + ::std::hash::Hash> Arbitrary<'a> for HashSet<A> {
+impl<'a, A: Arbitrary<'a> + Eq + ::std::hash::Hash, S: BuildHasher + Default> Arbitrary<'a>
+    for HashSet<A, S>
+{
     fn arbitrary(u: &mut Unstructured<'a>) -> Result<Self> {
         u.arbitrary_iter()?.collect()
     }