diff --git a/library/core/src/marker.rs b/library/core/src/marker.rs index cdf742057b7..29364d0ce9b 100644 --- a/library/core/src/marker.rs +++ b/library/core/src/marker.rs @@ -156,18 +156,18 @@ pub trait StructuralPartialEq { /// Required trait for constants used in pattern matches. /// /// Any type that derives `Eq` automatically implements this trait, *regardless* -/// of whether its type-parameters implement `Eq`. +/// of whether its type parameters implement `Eq`. /// -/// This is a hack to workaround a limitation in our type-system. +/// This is a hack to work around a limitation in our type system. /// -/// Background: +/// # Background /// /// We want to require that types of consts used in pattern matches /// have the attribute `#[derive(PartialEq, Eq)]`. /// /// In a more ideal world, we could check that requirement by just checking that -/// the given type implements both (1.) the `StructuralPartialEq` trait *and* -/// (2.) the `Eq` trait. However, you can have ADTs that *do* `derive(PartialEq, Eq)`, +/// the given type implements both the `StructuralPartialEq` trait *and* +/// the `Eq` trait. However, you can have ADTs that *do* `derive(PartialEq, Eq)`, /// and be a case that we want the compiler to accept, and yet the constant's /// type fails to implement `Eq`. /// @@ -176,8 +176,11 @@ pub trait StructuralPartialEq { /// ```rust /// #[derive(PartialEq, Eq)] /// struct Wrap(X); +/// /// fn higher_order(_: &()) { } +/// /// const CFN: Wrap = Wrap(higher_order); +/// /// fn main() { /// match CFN { /// CFN => {}