None

Built-in type

None

Stores the single unit value None.

None is the ordinary return type for procedures and functions without a returned data value. Plain unit parameters, results, locals, globals, and async completions are erased from the physical Wasm representation. The same value converts to the empty side of T?, while Some(None) remains a present unit value.

Examples

Use None

let unit: None = None

Capabilities

Member	Description	Available through
Debug	Produces an unambiguous structural representation of a value.
Equatable	Supports equality comparison.

Operators

Member	Description	Available through
==	Reports whether this value and another value are equal.	Available through Equatable
!=	Reports whether this value and another value differ.	Available through Equatable

Methods

Member	Description	Available through
debugString	Converts the receiver to its unambiguous structural representation.	Available through Debug
toString	Converts the receiver to its user-facing string representation.	Available through Display