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Update Cursive::find_id doc comment

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Mention SelectView and the need to get the type right.
This commit is contained in:
Alexandre Bury 2018-10-04 16:40:10 -07:00
parent 48d0aea92e
commit 44ddfc7abf
1 changed files with 22 additions and 0 deletions
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22
src/cursive.rs
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@ -470,6 +470,28 @@ impl Cursive {
/// view.set_content("bar");
/// ```
///
/// Note that you must specify the exact type for the view you're after; for example, using the
/// wrong item type in a `SelectView` will not find anything:
///
/// ```rust
/// # use cursive::Cursive;
/// # use cursive::views::{SelectView};
/// # let mut siv = Cursive::dummy();
/// use cursive::traits::Identifiable;
///
/// let select = SelectView::new().item("zero", 0u32).item("one", 1u32);
/// siv.add_layer(select.with_id("select"));
///
/// // Specifying a wrong type will not return anything.
/// assert!(siv.find_id::<SelectView<String>>("select").is_none());
///
/// // Omitting the type will use the default type, in this case `String`.
/// assert!(siv.find_id::<SelectView>("select").is_none());
///
/// // But with the correct type, it works fine.
/// assert!(siv.find_id::<SelectView<u32>>("select").is_some());
/// ```
///
/// [`IdView`]: views/struct.IdView.html
/// [`ViewRef`]: views/type.ViewRef.html
pub fn find_id<V>(&mut self, id: &str) -> Option<views::ViewRef<V>>