Vec::reserve

pub fn reserve(int n)

Ensures room for at least n more elements beyond the current length.

Called on a Vec value as value.reserve(…).

Parameters#

Examples#

use tests::assert;
let v: Vec<int> = [1, 2];
v.reserve(10);
assert!(v.capacity() >= 12);

See also#

• Vec: A growable, heap-allocated vector of T values.
• Vec::new: Creates a new, empty vector.
• Vec::with_capacity: Creates an empty vector with room for at least n elements.
• Vec::from: Creates a vector holding a copy of the elements of the fixed array arr.
• Vec::push: Appends x to the end of the vector.
• Vec::pop: Removes the last element and returns it, or None when the vector is empty.
• Vec::insert: Inserts x at index i, shifting later elements one place to the right.
• Vec::remove: Removes the element at index i and returns it, shifting later elements left.