Type aliasing

Type aliasing is a feature in some programming languages that allows the creation to refer to a type using another name. It does not create a new type hence does not increase type safety. It can be used to shorten a long name. Programing languages which allows type aliasing include C++, D, Dart, Elixir, Elm, F#, Go, Hack, Haskell, Julia, Kotlin, Nim, Python, Rust, Scala, Swift and TypeScript. C++ features type aliasing using the using keyword. using Distance = int; D features type aliasing using the alias keyword. alias Distance = int; Dart features type aliasing using the typedef keyword. typedef Distance = int; Elixir features type aliasing using @type. @type Distance :: integer Elm features type aliasing using type alias. type alias Distance = Int F3 features type aliasing using the type keyword. type Distance = int Go features type aliasing using the type keyword. type Distance int Hack features type aliasing using the newtype keyword. newtype Distance = int; Haskell features type aliasing using the type keyword. type Distance = Int; Julia features type aliasing. const Distance = Int Kotlin features type aliasing using the typealias keyword. typealias Distance = Int Nim features type aliasing. type Distance* = int Python features type aliasing using the typealias keyword. Vector = list[float] Type aliases may be marked with TypeAlias to make it explicit that the statement is a type alias declaration, not a normal variable assignment. from typing import TypeAlias Vector: TypeAlias = list[float] Rust features type aliasing using the type keyword. type Point = (u8, u8); Swift can create type aliases using opaque types. object Logarithms: opaque type Logarithm = Double Swift features type aliasing using the typealias keyword. typealias Distance = Int; TypeScript features type aliasing using the type keyword.