File: unconstrained-params-in-impl.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 (12 lines) | stat: -rw-r--r-- 312 bytes parent folder | download | duplicates (16) 
1
2
3
4
5
6
7
8
9
10
11
12
 
#![feature(lazy_type_alias)]
#![allow(incomplete_features)]

impl<T> NotInjective<T> {} //~ ERROR the type parameter `T` is not constrained

type NotInjective<T: ?Sized> = Local<<T as Discard>::Out>;
struct Local<T>(T);

trait Discard { type Out; }
impl<T: ?Sized> Discard for T { type Out = (); }

fn main() {}