40 lines
1.3 KiB
Rust
40 lines
1.3 KiB
Rust
// Test interaction between unboxed closure sugar and region
|
|
// parameters (should be exactly as if angle brackets were used
|
|
// and regions omitted).
|
|
|
|
#![feature(unboxed_closures)]
|
|
#![allow(dead_code)]
|
|
|
|
use std::marker;
|
|
|
|
trait Foo<'a,T> {
|
|
type Output;
|
|
fn dummy(&'a self) -> &'a (T,Self::Output);
|
|
}
|
|
|
|
trait Eq<X: ?Sized> { fn is_of_eq_type(&self, x: &X) -> bool { true } }
|
|
impl<X: ?Sized> Eq<X> for X { }
|
|
fn eq<A: ?Sized,B: ?Sized +Eq<A>>() { }
|
|
|
|
fn same_type<A,B:Eq<A>>(a: A, b: B) { }
|
|
|
|
fn test<'a,'b>() {
|
|
// Parens are equivalent to omitting default in angle.
|
|
eq::< dyn Foo<(isize,),Output=()>, dyn Foo(isize) >();
|
|
//~^ ERROR trait takes 1 lifetime argument but 0 lifetime arguments were supplied
|
|
|
|
// Here we specify 'static explicitly in angle-bracket version.
|
|
// Parenthesized winds up getting inferred.
|
|
eq::< dyn Foo<'static, (isize,),Output=()>, dyn Foo(isize) >();
|
|
//~^ ERROR trait takes 1 lifetime argument but 0 lifetime arguments were supplied
|
|
}
|
|
|
|
fn test2(x: &dyn Foo<(isize,),Output=()>, y: &dyn Foo(isize)) {
|
|
//~^ ERROR trait takes 1 lifetime argument but 0 lifetime arguments were supplied
|
|
// Here, the omitted lifetimes are expanded to distinct things.
|
|
same_type(x, y)
|
|
//~^ ERROR borrowed data escapes outside of function
|
|
}
|
|
|
|
fn main() { }
|