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73 lines
1.1 KiB
Forth
73 lines
1.1 KiB
Forth
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\ Mini OOF Example
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\needs class INCLUDE" D:MINIOOF.F"
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CR .( loading OOF Example )
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CR .( creating object class "animal" )
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object class
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2 var sound
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2 var color
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2 var kind
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method init
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method say
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method present
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end-class animal
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CR .( Implementing Methods )
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: m-say ( o -- )
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cr ." it says "
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sound @ COUNT TYPE ;
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' m-say animal defines say
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: m-present ( o -- )
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cr ." This animal is a "
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DUP color @ COUNT TYPE BL EMIT
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kind @ COUNT TYPE ." !" ;
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' m-present animal defines present
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: m-init ( say color kind o -- )
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>R
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R@ SOUND !
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R@ COLOR !
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R> KIND ! ;
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' m-init animal defines init
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CR .( creating animal objects )
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animal new constant dog
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animal new constant cat
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animal new constant eagle
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CR .( initializing objects )
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: S>A DROP 1- ; ( convert string to address )
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S" MAMAL" S>A
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S" BLACK" S>A
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S" BARK BARK" S>A dog init
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S" MAMAL" S>A
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S" SILVER" S>A
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S" MEOW MEOW" S>A cat init
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S" BIRD" S>A
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S" BROWN" S>A
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S" ARK ARK" S>A eagle init
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CR .( now lets the objects speak )
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CR
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dog present dog say
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cat present cat say
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eagle present eagle say
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CR .( Finish! )
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CR
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