Reserves enough space in the view’s underlying storage to store the specified number of ASCII characters.
- Xcode 10.0+
- Swift Standard Library
The minimum number of ASCII character’s worth of storage to allocate.
Because a Unicode scalar value can require more than a single ASCII character’s worth of storage, additional allocation may be necessary when adding to a Unicode scalar view after a call to
Complexity: O(n), where n is the capacity being reserved.