3 // Allows the macro invocation below to work
4 use crate as rustc_index;
6 rustc_macros::newtype_index! {
12 fn index_size_is_optimized() {
13 use std::mem::size_of;
15 assert_eq!(size_of::<MyIdx>(), 4);
17 assert_eq!(size_of::<Option<MyIdx>>(), 4);
19 assert_eq!(size_of::<Option<Option<MyIdx>>>(), 4);
21 assert_eq!(size_of::<Option<Option<Option<MyIdx>>>>(), 4);
23 assert_eq!(size_of::<Option<Option<Option<Option<MyIdx>>>>>(), 4);
25 assert_eq!(size_of::<Option<Option<Option<Option<Option<MyIdx>>>>>>(), 4);
27 assert_eq!(size_of::<Option<Option<Option<Option<Option<Option<MyIdx>>>>>>>(), 8);
31 fn range_iterator_iterates_forwards() {
32 let range = MyIdx::from_u32(1)..MyIdx::from_u32(4);
34 range.collect::<Vec<_>>(),
35 [MyIdx::from_u32(1), MyIdx::from_u32(2), MyIdx::from_u32(3)]
40 fn range_iterator_iterates_backwards() {
41 let range = MyIdx::from_u32(1)..MyIdx::from_u32(4);
43 range.rev().collect::<Vec<_>>(),
44 [MyIdx::from_u32(3), MyIdx::from_u32(2), MyIdx::from_u32(1)]
49 fn range_count_is_correct() {
50 let range = MyIdx::from_u32(1)..MyIdx::from_u32(4);
51 assert_eq!(range.count(), 3);
55 fn range_size_hint_is_correct() {
56 let range = MyIdx::from_u32(1)..MyIdx::from_u32(4);
57 assert_eq!(range.size_hint(), (3, Some(3)));