File: generic-const-exprs.rs

package info (click to toggle)
rustc 1.85.0%2Bdfsg3-1
  • links: PTS, VCS
  • area: main
  • in suites: experimental, forky, sid, trixie
  • size: 893,396 kB
  • sloc: xml: 158,127; python: 35,830; javascript: 19,497; cpp: 19,002; sh: 17,245; ansic: 13,127; asm: 4,376; makefile: 1,051; perl: 29; lisp: 29; ruby: 19; sql: 11
file content (28 lines) | stat: -rw-r--r-- 531 bytes parent folder | download | duplicates (6)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
//@ check-pass

#![feature(inherent_associated_types, generic_const_exprs)]
#![allow(incomplete_features)]

struct Parent<const O: usize>;

impl<const O: usize> Parent<O> {
    type Mapping<const I: usize> = Store<{ O + I }>
    where
        [(); O + I]:
    ;
}

struct Store<const N: usize>;

impl<const N: usize> Store<N> {
    const REIFIED: usize = N;

    fn reify() -> usize {
        N
    }
}

fn main() {
    let _ = Parent::<2>::Mapping::<{ 12 * 2 }>::REIFIED;
    let _ = Parent::<1>::Mapping::<{ 2 * 5 }>::reify();
}