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Auto merge of #11317 - nox:castable, r=mbrubeck

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Fix the doc on inheritance and casting

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This commit is contained in:
bors-servo 2016-05-21 09:29:58 -07:00
commit f1efeb00af
1 changed files with 5 additions and 5 deletions
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10
components/script/dom/mod.rs
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@ -157,18 +157,18 @@
//! Inheritance and casting
//! =======================
//!
//! For all DOM interfaces `Foo` in an inheritance chain, a
//! `dom::bindings::inheritance::FooCast` provides methods to cast
//! to other types in the inheritance chain. For example:
//! All DOM interfaces part of an inheritance chain (i.e. interfaces
//! that derive others or are derived from) implement the trait `Castable`
//! which provides both downcast and upcasts.
//!
//! ```ignore
//! # use script::dom::bindings::inheritance::{NodeCast, HTMLElementCast};
//! # use script::dom::bindings::inheritance::Castable;
//! # use script::dom::element::Element;
//! # use script::dom::node::Node;
//! # use script::dom::htmlelement::HTMLElement;
//! fn f(element: &Element) {
//! let base = element.upcast::<Node>();
//! let derived = element.downcast::<HTMLElement>();
//! let derived = element.downcast::<HTMLElement>().unwrap();
//! }
//! ```
//!