56 lines
1.5 KiB
Factor
56 lines
1.5 KiB
Factor
! (c)2010 Joe Groff, Erik Charlebois bsd license
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USING: accessors alien.c-types arrays classes.singleton combinators
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delegate fry generic.parser kernel macros math parser sequences words ;
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IN: alien.enums
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<PRIVATE
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TUPLE: enum-c-type base-type members ;
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C: <enum-c-type> enum-c-type
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CONSULT: c-type-protocol enum-c-type
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base-type>> ;
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PRIVATE>
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GENERIC: enum>number ( enum -- number ) foldable
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M: integer enum>number ;
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<PRIVATE
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: enum-boxer ( members -- quot )
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[ first2 swap '[ _ ] 2array ]
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{ } map-as [ ] suffix '[ _ case ] ;
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PRIVATE>
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MACRO: number>enum ( enum-c-type -- )
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c-type members>> enum-boxer ;
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M: enum-c-type c-type-boxed-class drop object ;
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M: enum-c-type c-type-boxer-quot members>> enum-boxer ;
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M: enum-c-type c-type-unboxer-quot drop [ enum>number ] ;
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M: enum-c-type c-type-setter
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[ enum>number ] swap base-type>> c-type-setter '[ _ 2dip @ ] ;
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<PRIVATE
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: define-enum>number ( class value -- )
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[ \ enum>number create-method-in ]
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[ '[ drop _ ] ] bi* define ;
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: define-enum-members ( member-names -- )
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[
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[ first define-singleton-class ]
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[ first2 define-enum>number ] bi
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] each ;
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: define-enum-constructor ( word -- )
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[ name>> "<" ">" surround create-in ] keep
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[ number>enum ] curry (( number -- enum )) define-inline ;
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PRIVATE>
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: define-enum ( word base-type members -- )
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[ dup define-enum-constructor ] 2dip
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dup define-enum-members
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<enum-c-type> swap typedef ;
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PREDICATE: enum-c-type-word < c-type-word
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"c-type" word-prop enum-c-type? ;
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