<struct-boa> ( class -- quot: ( ... -- struct ) )
Factor handbook » C library interface » Struct classes » Creating instances of structs

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Vocabulary
classes.struct

Inputs

class

a class

Outputs
None

Word description
This macro implements boa for struct classes. A struct of the given class is constructed, and its slots are initialized using values off the top of the datastack.

See also
<struct>, malloc-struct, memory>struct

Definition

USING: classes.struct.private combinators generalizations kernel
sequences ;

IN: classes.struct

MACRO: <struct-boa> ( class -- quot: ( ... -- struct ) )
    dup struct-slots
    [ length ]
    [ [ (writer-quot) [ [ over ] ] dip compose ] map ] bi
    [ [ (struct) ] curry ] 2dip [ [ ndip ] 2curry ] dip
    [ spread ] curry compose ;