Absent type

Represents a target configuration list item that must be absent

Direct parent types

FullBox: Represents presence of a value
Direct subtypes: 8

PartialPresence: Undocumented
Direct subtypes: 2

Methods

=~(x:Any, a:Absent, mc:MatchContext) Source: stdlib.ngs:4456

Checks element absence.

Returns

Bool

Example

[1,2,3] =~ Absent(0)  # MatchSuccess