String.LocalizationValue.Placeholder
An enumeration of types that can appear as a placeholder in a string interpolation.
Declaration
enum PlaceholderOverview
Foundation uses this type when you create a string with the \(placeholder: type) syntax and supply an array of replacement values in a String.LocalizationOptions. Placeholders work with String initializers that take an options: parameter:
You only use this type directly when specifying one of its enumeration cases in the placeholder syntax, like \(placeholder: .int).