Required Associated Typeswift 6.0.3Swift

StringInterpolation

The type each segment of a string literal containing interpolations should be appended to.

associatedtype StringInterpolation : StringInterpolationProtocol = DefaultStringInterpolation where Self.StringLiteralType == Self.StringInterpolation.StringLiteralType

The StringLiteralType of an interpolation type must match the StringLiteralType of the conforming type.