File: variance-associated-consts.rs

package info (click to toggle)
rustc 1.88.0%2Bdfsg1-1
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid
  • size: 934,128 kB
  • sloc: xml: 158,127; python: 36,062; javascript: 19,855; sh: 19,700; cpp: 18,947; ansic: 12,993; asm: 4,792; makefile: 690; lisp: 29; perl: 29; ruby: 19; sql: 11
file content (18 lines) | stat: -rw-r--r-- 398 bytes parent folder | download | duplicates (14) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
 
// Test that the variance computation considers types that
// appear in const expressions to be invariant.

#![feature(rustc_attrs)]
#![allow(incomplete_features)]
#![feature(generic_const_exprs)]

trait Trait {
    const Const: usize;
}

#[rustc_variance]
struct Foo<T: Trait> { //~ ERROR [T: o]
    field: [u8; <T as Trait>::Const]
    //~^ ERROR: unconstrained generic constant
}

fn main() { }