Modern Optional None

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None

Returns an empty Optional of the type you write out.

Syntax

None( of T )

Examples

#import "std/outcome"
using outcome

dim o as Optional( of integer ) = None( of integer )( )

print o.HasValue( )          '' false

'' The type argument must be written: there is no parameter to infer
'' from. A default-constructed Optional is already empty, so this is for
'' saying "absent" out loud, typically in a return.
dim d as Optional( of integer )
print d.HasValue( )          '' false

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Library: Optional
Category: Optional
Documented under: Members