[rustc.git] / src / test / ui / unboxed-closures / unboxed-closure-feature-gate.rs

// Check that parenthetical notation is feature-gated except with the
// `Fn` traits.

use std::marker;

trait Foo<A> {
    type Output;

    fn dummy(&self, a: A) { }
}

fn main() {
    let x: Box<dyn Foo(isize)>;
    //~^ ERROR parenthetical notation is only stable when used with `Fn`-family

    // No errors with these:
    let x: Box<dyn Fn(isize)>;
    let x: Box<dyn FnMut(isize)>;
    let x: Box<dyn FnOnce(isize)>;
}
Commit	Line	Data
1a4d82fc JJ	1	// Check that parenthetical notation is feature-gated except with the
1a4d82fc JJ	2	// `Fn` traits.
223e47cc	3
85aaf69f SL	4	use std::marker;
	5
	6	trait Foo<A> {
	7	type Output;
	8
	9	fn dummy(&self, a: A) { }
223e47cc LB	10	}
	11
	12	fn main() {
dc9dc135	13	let x: Box<dyn Foo(isize)>;
c1a9b12d	14	//~^ ERROR parenthetical notation is only stable when used with `Fn`-family
1a4d82fc JJ	15
1a4d82fc JJ	16	// No errors with these:
dc9dc135 XL	17	let x: Box<dyn Fn(isize)>;
	18	let x: Box<dyn FnMut(isize)>;
	19	let x: Box<dyn FnOnce(isize)>;
223e47cc	20	}