bjoernager/rust
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Rustdoc: use ThinVec for GenericArgs bindings

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This commit is contained in:
Jakub Beránek 2021-12-31 11:10:27 +01:00
parent e91ad5fc62
commit 3d8d3f1435
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4 changed files with 18 additions and 12 deletions
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14
compiler/rustc_data_structures/src/thin_vec.rs
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@ -5,7 +5,7 @@ use std::iter::FromIterator;
/// A vector type optimized for cases where this size is usually 0 (cf. `SmallVec`).
/// The `Option<Box<..>>` wrapping allows us to represent a zero sized vector with `None`,
/// which uses only a single (null) pointer.
#[derive(Clone, Encodable, Decodable, Debug)]
#[derive(Clone, Encodable, Decodable, Debug, Hash, Eq, PartialEq)]
pub struct ThinVec<T>(Option<Box<Vec<T>>>);
impl<T> ThinVec<T> {
@ -20,6 +20,13 @@ impl<T> ThinVec<T> {
pub fn iter_mut(&mut self) -> std::slice::IterMut<'_, T> {
self.into_iter()
}
pub fn push(&mut self, item: T) {
match *self {
ThinVec(Some(ref mut vec)) => vec.push(item),
ThinVec(None) => *self = vec![item].into(),
}
}
}
impl<T> From<Vec<T>> for ThinVec<T> {
@ -101,10 +108,7 @@ impl<T> Extend<T> for ThinVec<T> {
}
fn extend_one(&mut self, item: T) {
match *self {
ThinVec(Some(ref mut vec)) => vec.push(item),
ThinVec(None) => *self = vec![item].into(),
}
self.push(item)
}
fn extend_reserve(&mut self, additional: usize) {