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|
//@aux-build:proc_macros.rs
#![allow(unused, clippy::needless_lifetimes)]
#![warn(clippy::extra_unused_type_parameters)]
extern crate proc_macros;
use proc_macros::with_span;
fn unused_ty<T>(x: u8) {
unimplemented!()
}
fn unused_multi<T, U>(x: u8) {
unimplemented!()
}
fn unused_with_lt<'a, T>(x: &'a u8) {
unimplemented!()
}
fn used_ty<T>(x: T, y: u8) {}
fn used_ref<'a, T>(x: &'a T) {}
fn used_ret<T: Default>(x: u8) -> T {
T::default()
}
fn unused_bounded<T: Default, U, V: Default>(x: U) {
unimplemented!();
}
fn some_unused<A, B, C, D: Iterator<Item = (B, C)>, E>(b: B, c: C) {
unimplemented!();
}
fn used_opaque<A>(iter: impl Iterator<Item = A>) -> usize {
iter.count()
}
fn used_ret_opaque<A>() -> impl Iterator<Item = A> {
std::iter::empty()
}
fn used_vec_box<T>(x: Vec<Box<T>>) {}
fn used_body<T: Default + ToString>() -> String {
T::default().to_string()
}
fn used_closure<T: Default + ToString>() -> impl Fn() {
|| println!("{}", T::default().to_string())
}
struct S;
impl S {
fn unused_ty_impl<T>(&self) {
unimplemented!()
}
}
// Don't lint on trait methods
trait Foo {
fn bar<T>(&self);
}
impl Foo for S {
fn bar<T>(&self) {}
}
fn skip_index<A, Iter>(iter: Iter, index: usize) -> impl Iterator<Item = A>
where
Iter: Iterator<Item = A>,
{
iter.enumerate()
.filter_map(move |(i, a)| if i == index { None } else { Some(a) })
}
fn unused_opaque<A, B>(dummy: impl Default) {
unimplemented!()
}
mod unexported_trait_bounds {
mod private {
pub trait Private {}
}
fn priv_trait_bound<T: private::Private>() {
unimplemented!();
}
fn unused_with_priv_trait_bound<T: private::Private, U>() {
unimplemented!();
}
}
mod issue10319 {
fn assert_send<T: Send>() {}
fn assert_send_where<T>()
where
T: Send,
{
}
}
with_span!(
span
fn should_not_lint<T>(x: u8) {
unimplemented!()
}
);
mod issue11302 {
use std::fmt::Debug;
use std::marker::PhantomData;
#[derive(Debug)]
struct Wrapper<T>(PhantomData<T>);
fn store<T: 'static>(v: &mut Vec<Box<dyn Debug>>)
where
Wrapper<T>: Debug,
{
v.push(Box::new(Wrapper(PhantomData)));
}
}
fn main() {}
|
