library/alloc/tests/lib.rs

   1 #![feature(allocator_api)]
   2 #![feature(alloc_layout_extra)]
   3 #![feature(assert_matches)]
   4 #![feature(box_syntax)]
   5 #![feature(btree_drain_filter)]
   6 #![feature(cow_is_borrowed)]
   7 #![feature(const_box)]
   8 #![feature(const_convert)]
   9 #![feature(const_cow_is_borrowed)]
  10 #![feature(const_heap)]
  11 #![feature(const_mut_refs)]
  12 #![feature(const_nonnull_slice_from_raw_parts)]
  13 #![feature(const_ptr_write)]
  14 #![feature(const_try)]
  15 #![feature(core_intrinsics)]
  16 #![feature(drain_filter)]
  17 #![feature(exact_size_is_empty)]
  18 #![feature(linked_list_cursors)]
  19 #![feature(map_try_insert)]
  20 #![feature(new_uninit)]
  21 #![feature(pattern)]
  22 #![feature(trusted_len)]
  23 #![feature(try_reserve_kind)]
  24 #![feature(unboxed_closures)]
  25 #![feature(associated_type_bounds)]
  26 #![feature(binary_heap_into_iter_sorted)]
  27 #![feature(binary_heap_drain_sorted)]
  28 #![feature(slice_ptr_get)]
  29 #![feature(binary_heap_retain)]
  30 #![feature(binary_heap_as_slice)]
  31 #![feature(inplace_iteration)]
  32 #![feature(iter_advance_by)]
  33 #![feature(iter_next_chunk)]
  34 #![feature(round_char_boundary)]
  35 #![feature(slice_group_by)]
  36 #![feature(slice_partition_dedup)]
  37 #![feature(string_remove_matches)]
  38 #![feature(const_btree_len)]
  39 #![feature(const_default_impls)]
  40 #![feature(const_trait_impl)]
  41 #![feature(const_str_from_utf8)]
  42 #![feature(nonnull_slice_from_raw_parts)]
  43 #![feature(panic_update_hook)]
  44 #![feature(pointer_is_aligned)]
  45 #![feature(slice_flatten)]
  46 #![feature(thin_box)]
  47 #![feature(strict_provenance)]
  48 #![feature(once_cell)]
  49 #![feature(drain_keep_rest)]
  50 #![deny(fuzzy_provenance_casts)]
  51 #![deny(unsafe_op_in_unsafe_fn)]
  52
  53 use std::collections::hash_map::DefaultHasher;
  54 use std::hash::{Hash, Hasher};
  55
  56 mod arc;
  57 mod autotraits;
  58 mod borrow;
  59 mod boxed;
  60 mod btree_set_hash;
  61 mod c_str;
  62 mod const_fns;
  63 mod cow_str;
  64 mod fmt;
  65 mod heap;
  66 mod linked_list;
  67 mod rc;
  68 mod slice;
  69 mod str;
  70 mod string;
  71 mod thin_box;
  72 mod vec;
  73 mod vec_deque;
  74
  75 fn hash<T: Hash>(t: &T) -> u64 {
  76     let mut s = DefaultHasher::new();
  77     t.hash(&mut s);
  78     s.finish()
  79 }
  80
  81 // FIXME: Instantiated functions with i128 in the signature is not supported in Emscripten.
  82 // See https://github.com/kripken/emscripten-fastcomp/issues/169
  83 #[cfg(not(target_os = "emscripten"))]
  84 #[test]
  85 fn test_boxed_hasher() {
  86     let ordinary_hash = hash(&5u32);
  87
  88     let mut hasher_1 = Box::new(DefaultHasher::new());
  89     5u32.hash(&mut hasher_1);
  90     assert_eq!(ordinary_hash, hasher_1.finish());
  91
  92     let mut hasher_2 = Box::new(DefaultHasher::new()) as Box<dyn Hasher>;
  93     5u32.hash(&mut hasher_2);
  94     assert_eq!(ordinary_hash, hasher_2.finish());
  95 }