1 #![feature(allocator_api)]
2 #![feature(box_syntax)]
3 #![feature(cow_is_borrowed)]
4 #![feature(const_cow_is_borrowed)]
5 #![feature(drain_filter)]
6 #![feature(exact_size_is_empty)]
7 #![feature(new_uninit)]
9 #![feature(str_split_once)]
10 #![feature(trusted_len)]
11 #![feature(try_reserve)]
12 #![feature(unboxed_closures)]
13 #![feature(associated_type_bounds)]
14 #![feature(binary_heap_into_iter_sorted)]
15 #![feature(binary_heap_drain_sorted)]
16 #![feature(slice_ptr_get)]
17 #![feature(binary_heap_retain)]
18 #![feature(inplace_iteration)]
19 #![feature(iter_map_while)]
20 #![feature(int_bits_const)]
21 #![feature(vecdeque_binary_search)]
22 #![feature(slice_group_by)]
23 #![feature(vec_extend_from_within)]
25 use std::collections::hash_map::DefaultHasher;
26 use std::hash::{Hash, Hasher};
44 fn hash<T: Hash>(t: &T) -> u64 {
45 let mut s = DefaultHasher::new();
50 // FIXME: Instantiated functions with i128 in the signature is not supported in Emscripten.
51 // See https://github.com/kripken/emscripten-fastcomp/issues/169
52 #[cfg(not(target_os = "emscripten"))]
54 fn test_boxed_hasher() {
55 let ordinary_hash = hash(&5u32);
57 let mut hasher_1 = Box::new(DefaultHasher::new());
58 5u32.hash(&mut hasher_1);
59 assert_eq!(ordinary_hash, hasher_1.finish());
61 let mut hasher_2 = Box::new(DefaultHasher::new()) as Box<dyn Hasher>;
62 5u32.hash(&mut hasher_2);
63 assert_eq!(ordinary_hash, hasher_2.finish());