Protocol

ExpressibleByBooleanLiteral

A type that can be initialized with the Boolean literals true and false.

Declaration

protocol ExpressibleByBooleanLiteral

Overview

Only three types provided by Swift—Bool, DarwinBoolean, and ObjCBool—are treated as Boolean values. Expanding this set to include types that represent more than simple Boolean values is discouraged.

To add ExpressibleByBooleanLiteral conformance to your custom type, implement the init(booleanLiteral:) initializer that creates an instance of your type with the given Boolean value.

Topics

Associated Types

associatedtype BooleanLiteralType

A type that represents a Boolean literal, such as Bool.

Required.

Initializers

init(booleanLiteral: Self.BooleanLiteralType)

Creates an instance initialized to the given Boolean value.

Required.

Relationships

Conforming Types

See Also

Value Literals

protocol ExpressibleByIntegerLiteral

A type that can be initialized with an integer literal.

protocol ExpressibleByFloatLiteral

A type that can be initialized with a floating-point literal.

protocol ExpressibleByNilLiteral

A type that can be initialized using the nil literal, nil.