rust-clippy/tests/ui/impl_trait_in_params.rs

47 lines
1.1 KiB
Rust

#![allow(unused)]
#![warn(clippy::impl_trait_in_params)]
//@no-rustfix
pub trait Trait {}
pub trait AnotherTrait<T> {}
// Should warn
pub fn a(_: impl Trait) {}
//~^ ERROR: `impl Trait` used as a function parameter
pub fn c<C: Trait>(_: C, _: impl Trait) {}
//~^ ERROR: `impl Trait` used as a function parameter
// Shouldn't warn
pub fn b<B: Trait>(_: B) {}
fn e<T: AnotherTrait<u32>>(_: T) {}
fn d(_: impl AnotherTrait<u32>) {}
//------ IMPLS
pub trait Public {
// See test in ui-toml for a case where avoid-breaking-exported-api is set to false
fn t(_: impl Trait);
fn tt<T: Trait>(_: T) {}
}
trait Private {
// This shouldn't lint
fn t(_: impl Trait);
fn tt<T: Trait>(_: T) {}
}
struct S;
impl S {
pub fn h(_: impl Trait) {} //~ ERROR: `impl Trait` used as a function parameter
fn i(_: impl Trait) {}
pub fn j<J: Trait>(_: J) {}
pub fn k<K: AnotherTrait<u32>>(_: K, _: impl AnotherTrait<u32>) {} //~ ERROR: `impl Trait` used as a function parameter
}
// Trying with traits
impl Public for S {
fn t(_: impl Trait) {}
}
fn main() {}