rust-clippy/tests/ui/trait_duplication_in_bounds.rs

// run-rustfix
#![deny(clippy::trait_duplication_in_bounds)]
#![allow(clippy::impl_trait_param)]
#![allow(unused)]

fn bad_foo<T: Clone + Clone + Clone + Copy, U: Clone + Copy>(arg0: T, argo1: U) {
    unimplemented!();
}

fn bad_bar<T, U>(arg0: T, arg1: U)
where
    T: Clone + Clone + Clone + Copy,
    U: Clone + Copy,
{
    unimplemented!();
}

fn good_bar<T: Clone + Copy, U: Clone + Copy>(arg0: T, arg1: U) {
    unimplemented!();
}

fn good_foo<T, U>(arg0: T, arg1: U)
where
    T: Clone + Copy,
    U: Clone + Copy,
{
    unimplemented!();
}

trait GoodSelfTraitBound: Clone + Copy {
    fn f();
}

trait GoodSelfWhereClause {
    fn f()
    where
        Self: Clone + Copy;
}

trait BadSelfTraitBound: Clone + Clone + Clone {
    fn f();
}

trait BadSelfWhereClause {
    fn f()
    where
        Self: Clone + Clone + Clone;
}

trait GoodTraitBound<T: Clone + Copy, U: Clone + Copy> {
    fn f();
}

trait GoodWhereClause<T, U> {
    fn f()
    where
        T: Clone + Copy,
        U: Clone + Copy;
}

trait BadTraitBound<T: Clone + Clone + Clone + Copy, U: Clone + Copy> {
    fn f();
}

trait BadWhereClause<T, U> {
    fn f()
    where
        T: Clone + Clone + Clone + Copy,
        U: Clone + Copy;
}

struct GoodStructBound<T: Clone + Copy, U: Clone + Copy> {
    t: T,
    u: U,
}

impl<T: Clone + Copy, U: Clone + Copy> GoodTraitBound<T, U> for GoodStructBound<T, U> {
    // this should not warn
    fn f() {}
}

struct GoodStructWhereClause;

impl<T, U> GoodTraitBound<T, U> for GoodStructWhereClause
where
    T: Clone + Copy,
    U: Clone + Copy,
{
    // this should not warn
    fn f() {}
}

fn no_error_separate_arg_bounds(program: impl AsRef<()>, dir: impl AsRef<()>, args: &[impl AsRef<()>]) {}

trait GenericTrait<T> {}

fn good_generic<T: GenericTrait<u64> + GenericTrait<u32>>(arg0: T) {
    unimplemented!();
}

fn bad_generic<T: GenericTrait<u64> + GenericTrait<u32> + GenericTrait<u64>>(arg0: T) {
    unimplemented!();
}

mod foo {
    pub trait Clone {}
}

fn qualified_path<T: std::clone::Clone + Clone + foo::Clone>(arg0: T) {
    unimplemented!();
}

fn main() {}