formIndex(before:)
Replaces the given index with its predecessor.
Declaration
func formIndex(before i: inout Substring.UnicodeScalarView.Index)Parameters
- i:
A valid index of the collection.
imust be greater thanstartIndex.
Replaces the given index with its predecessor.
func formIndex(before i: inout Substring.UnicodeScalarView.Index)A valid index of the collection. i must be greater than startIndex.