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Add guarantee that Vec::default() does not alloc #100872

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Aug 22, 2022
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Add guarantee that Vec::default() does not alloc #100872

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2 changes: 2 additions & 0 deletions library/alloc/src/vec/mod.rs
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Expand Up @@ -2927,6 +2927,8 @@ unsafe impl<#[may_dangle] T, A: Allocator> Drop for Vec<T, A> {
#[rustc_const_unstable(feature = "const_default_impls", issue = "87864")]
impl<T> const Default for Vec<T> {
/// Creates an empty `Vec<T>`.
///
/// The vector will not allocate until elements are pushed onto it.
fn default() -> Vec<T> {
Vec::new()
}
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