rust/tests/ui/underscore-lifetimes.rs

39 lines
495 B
Rust

//@ run-pass
#![allow(dead_code)]
struct Foo<'a>(&'a u8);
fn foo(x: &u8) -> Foo<'_> {
Foo(x)
}
fn foo2(x: &'_ u8) -> Foo<'_> {
Foo(x)
}
fn foo3(x: &'_ u8) -> Foo {
Foo(x)
}
fn foo4(_: Foo<'_>) {}
struct Foo2<'a, 'b> {
a: &'a u8,
b: &'b u8,
}
fn foo5<'b>(foo: Foo2<'_, 'b>) -> &'b u8 {
foo.b
}
fn main() {
let x = &5;
let _ = foo(x);
let _ = foo2(x);
let _ = foo3(x);
foo4(Foo(x));
let _ = foo5(Foo2 {
a: x,
b: &6,
});
}