A type that can be initialized with an integer literal.
SDK
- Xcode 8.0+
Framework
- Swift Standard Library
Declaration
protocol ExpressibleByIntegerLiteral
Overview
The standard library integer and floating-point types, such as Int and Double, conform to the Expressible protocol. You can initialize a variable or constant of any of these types by assigning an integer literal.
// Type inferred as 'Int'
let cookieCount = 12
// An array of 'Int'
let chipsPerCookie = [21, 22, 25, 23, 24, 19]
// A floating-point value initialized using an integer literal
let redPercentage: Double = 1
// redPercentage == 1.0
Conforming to ExpressibleByIntegerLiteral
To add Expressible conformance to your custom type, implement the required initializer.