12 lines
544 B
Plaintext
12 lines
544 B
Plaintext
(lib 'gloops) ; load oo library
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(define-class Person null (name (age :initform 66)))
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(define-method tostring (Person) (lambda (p) ( format "🚶 %a " p.name)))
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(define-method mailto (Person Person) (lambda( p o) (printf "From %a to️ %a : ..." p o)))
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;; define a sub-class of Person with same methods
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(define-class Writer (Person) (books))
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(define-method tostring (Writer) (lambda (w)( format "🎩 %a" w.name)))
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(define-method mailto (Person Writer)
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(lambda (p w) (printf " From %a (age %d). Dear writer of %a ..." p p.age w.books )))
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