SINGLETON: - Factor Documentation

Vocabulary
syntax

Syntax

SINGLETON: class

Inputs and outputs

class

a new singleton to define

Word description
Defines a new singleton class. The class word itself is the sole instance of the singleton class.

Examples

USING: classes.singleton kernel io ;
IN: singleton-demo
USE: prettyprint SINGLETON: foo
GENERIC: bar ( obj -- )
M: foo bar drop "a foo!" print ;
foo bar
a foo!

See also
define-singleton-class

Definition

USING: classes.parser classes.singleton ;

IN: syntax

SYNTAX: SINGLETON: scan-new-class define-singleton-class ;