1 #![feature(allocator_api)]
2 #![feature(box_syntax)]
3 #![feature(drain_filter)]
4 #![feature(exact_size_is_empty)]
5 #![feature(map_first_last)]
6 #![feature(new_uninit)]
8 #![feature(trusted_len)]
9 #![feature(try_reserve)]
10 #![feature(unboxed_closures)]
11 #![feature(associated_type_bounds)]
12 #![feature(binary_heap_into_iter_sorted)]
13 #![feature(binary_heap_drain_sorted)]
15 use std::hash::{Hash, Hasher};
16 use std::collections::hash_map::DefaultHasher;
33 fn hash<T: Hash>(t: &T) -> u64 {
34 let mut s = DefaultHasher::new();
39 // FIXME: Instantiated functions with i128 in the signature is not supported in Emscripten.
40 // See https://github.com/kripken/emscripten-fastcomp/issues/169
41 #[cfg(not(target_os = "emscripten"))]
43 fn test_boxed_hasher() {
44 let ordinary_hash = hash(&5u32);
46 let mut hasher_1 = Box::new(DefaultHasher::new());
47 5u32.hash(&mut hasher_1);
48 assert_eq!(ordinary_hash, hasher_1.finish());
50 let mut hasher_2 = Box::new(DefaultHasher::new()) as Box<dyn Hasher>;
51 5u32.hash(&mut hasher_2);
52 assert_eq!(ordinary_hash, hasher_2.finish());