3 // Allows the macro invocation below to work
4 use crate as rustc_index;
6 rustc_macros::newtype_index!(struct MyIdx { MAX = 0xFFFF_FFFA });
9 fn index_size_is_optimized() {
10 use std::mem::size_of;
12 assert_eq!(size_of::<MyIdx>(), 4);
14 assert_eq!(size_of::<Option<MyIdx>>(), 4);
16 assert_eq!(size_of::<Option<Option<MyIdx>>>(), 4);
18 assert_eq!(size_of::<Option<Option<Option<MyIdx>>>>(), 4);
20 assert_eq!(size_of::<Option<Option<Option<Option<MyIdx>>>>>(), 4);
22 assert_eq!(size_of::<Option<Option<Option<Option<Option<MyIdx>>>>>>(), 4);
24 assert_eq!(size_of::<Option<Option<Option<Option<Option<Option<MyIdx>>>>>>>(), 8);
28 fn range_iterator_iterates_forwards() {
29 let range = MyIdx::from_u32(1)..MyIdx::from_u32(4);
31 range.collect::<Vec<_>>(),
32 [MyIdx::from_u32(1), MyIdx::from_u32(2), MyIdx::from_u32(3)]
37 fn range_iterator_iterates_backwards() {
38 let range = MyIdx::from_u32(1)..MyIdx::from_u32(4);
40 range.rev().collect::<Vec<_>>(),
41 [MyIdx::from_u32(3), MyIdx::from_u32(2), MyIdx::from_u32(1)]
46 fn range_count_is_correct() {
47 let range = MyIdx::from_u32(1)..MyIdx::from_u32(4);
48 assert_eq!(range.count(), 3);
52 fn range_size_hint_is_correct() {
53 let range = MyIdx::from_u32(1)..MyIdx::from_u32(4);
54 assert_eq!(range.size_hint(), (3, Some(3)));