mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-30 10:45:18 +00:00
27 lines
517 B
Rust
27 lines
517 B
Rust
// Test that we DO warn for a lifetime on an impl used only in `&self`
|
|
// in a trait method.
|
|
|
|
#![deny(single_use_lifetimes)]
|
|
#![allow(dead_code)]
|
|
#![allow(unused_variables)]
|
|
|
|
struct Foo<'f> {
|
|
data: &'f u32
|
|
}
|
|
|
|
impl<'f> Iterator for Foo<'f> {
|
|
type Item = &'f u32;
|
|
|
|
fn next<'g>(&'g mut self) -> Option<Self::Item> { //~ ERROR `'g` only used once
|
|
//~^ HELP elide the single-use lifetime
|
|
None
|
|
}
|
|
}
|
|
|
|
trait Bar<'a> {
|
|
// But we should not warn here.
|
|
fn bar(x: Foo<'a>);
|
|
}
|
|
|
|
fn main() {}
|