rust/tests/ui/deriving/issue-103157.rs

// check-fail

#[derive(PartialEq, Eq)]
pub enum Value {
    Boolean(Option<bool>),
    Float(Option<f64>), //~ ERROR the trait bound `f64: Eq` is not satisfied
}

fn main() {
    let a = Value::Float(Some(f64::NAN));
    assert!(a == a);
}
Fix `TyKind::is_simple_path`. PR #98758 introduced code to avoid redundant assertions in derived code like this: ``` let _: ::core::clone::AssertParamIsClone<u32>; let _: ::core::clone::AssertParamIsClone<u32>; ``` But the predicate `is_simple_path` introduced as part of this failed to account for generic arguments. Therefore the deriving code erroneously considers types like `Option<bool>` and `Option<f32>` to be the same. This commit fixes `is_simple_path`. Fixes #103157. 2022-10-18 02:07:20 +00:00			`// check-fail`

			`#[derive(PartialEq, Eq)]`
			`pub enum Value {`
			`Boolean(Option<bool>),`
			Float(Option<f64>), //~ ERROR the trait bound `f64: Eq` is not satisfied
			`}`

			`fn main() {`
			`let a = Value::Float(Some(f64::NAN));`
			`assert!(a == a);`
			`}`