Contents

formIndex(_:offsetBy:)

Offsets the given index by the specified distance.

Declaration

func formIndex(_ i: inout Self.Index, offsetBy distance: Int)

Parameters

  • i:

    A valid index of the collection.

  • distance:

    The distance to offset i. distance must not be negative unless the collection conforms to the BidirectionalCollection protocol.

Discussion

The value passed as distance must not offset i beyond the bounds of the collection.