Kevin Reid at 17:03, 28 August 2010

Kevin Reid — Sat, 28 Aug 2010 17:03:59 GMT

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The [[void]] guard, present in the [[universal environment]], coerces all inputs to [[null]].

It specifies that a given data flow path (particularly, a method return value) carries no information and is not used.

In [[E syntactic version]]s prior to 0.9 (before the “easy-return” syntactic feature), the default result guard for methods was [[void]] rather than [[any]]; thus the method body's return value was null unless a guard was specified.

? void
# value: void

? void.coerce(def obj {}, throw)
# value: null

[[Category:Guards]]

Void - Revision history

Kevin Reid at 17:03, 28 August 2010