variant-class
Algebraic data types

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Vocabulary
variants

Class description
This class comprises class names that have been defined with VARIANT:. When a variant-class is used as the type of a specialized tuple slot, the variant's first member type is used as the default initial-value.

See also
VARIANT:, match

Definition

USING: classes.mixin words ;

IN: variants

PREDICATE: variant-class < mixin-class "variant?" word-prop ;

Methods

USING: classes kernel sequences slots variants words ;

M: variant-class initial-value*
    class-members
    [ f f ] [ first dup word? [ t ] [ initial-value* ] if ]
    if-empty ;