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Generic Parameters and Arguments | Documentation

docs.swift.org · 92 words · saved by 1 readers

This chapter describes parameters and arguments for generic types, functions, and initializers. When you declare a generic type, function, subscript, or initializer, you specify the type parameters that the generic type, function, or initializer can work with. These type parameters act as placeholders that are replaced by actual concrete type arguments when an instance of a generic type is created or a generic function or initializer is called. For an overview of generics in Swift, see Generics. A generic parameter clause specifies the type parameters of a generic type or function, along with any associated constraints and requirements on those parameters. A generic parameter clause is enclosed in angle brackets ( ) and has the following form: The generic parameter list is a comma-separated list of generic parameters, each of which has the following form: A generic parameter consists of a type parameter followed by an optional constraint. A type parameter is simply the name of a place

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