rust/tests/compile-fail/unused_lt.rs

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#![feature(plugin)]
#![plugin(clippy)]
#![allow(unused, dead_code, needless_lifetimes)]
#![deny(unused_lifetimes)]
fn empty() {
}
fn used_lt<'a>(x: &'a u8) {
}
fn unused_lt<'a>(x: u8) { //~ ERROR this lifetime
}
fn unused_lt_transitive<'a, 'b: 'a>(x: &'b u8) { //~ ERROR this lifetime
// 'a is useless here since it's not directly bound
}
fn lt_return<'a, 'b: 'a>(x: &'b u8) -> &'a u8 {
panic!()
}
fn lt_return_only<'a>() -> &'a u8 {
panic!()
}
fn unused_lt_blergh<'a>(x: Option<Box<Send+'a>>) {
}
trait Foo<'a> {
fn x(&self, a: &'a u8);
}
impl<'a> Foo<'a> for u8 {
fn x(&self, a: &'a u8) {
}
}
struct Bar;
impl Bar {
fn x<'a>(&self) {} //~ ERROR this lifetime
}
// test for #489 (used lifetimes in bounds)
pub fn parse<'a, I: Iterator<Item=&'a str>>(_it: &mut I) {
unimplemented!()
}
pub fn parse2<'a, I>(_it: &mut I) where I: Iterator<Item=&'a str>{
unimplemented!()
}
struct X { x: u32 }
impl X {
fn self_ref_with_lifetime<'a>(&'a self) {}
fn explicit_self_with_lifetime<'a>(self: &'a Self) {}
}
fn main() {
}