2008-07-22 04:29:48 -04:00
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! Copyright © 2008 Reginald Keith Ford II
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! 24, the Factor game!
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USING: kernel random namespaces shuffle sequences
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2008-07-24 16:34:25 -04:00
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parser io math prettyprint combinators continuations
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2008-07-22 04:29:48 -04:00
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vectors words quotations accessors math.parser
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backtrack math.ranges locals fry memoize macros assocs ;
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2008-07-22 04:43:27 -04:00
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IN: 24-game
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2008-07-22 04:29:48 -04:00
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2008-07-22 20:45:13 -04:00
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: nop ;
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2008-07-22 04:29:48 -04:00
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: do-something ( a b -- c ) { + - * } amb-execute ;
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: maybe-swap ( a b -- a b ) { nop swap } amb-execute ;
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: some-rots ( a b c -- a b c )
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#! Try each permutation of 3 elements.
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{ nop rot -rot swap spin swapd } amb-execute ;
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: makes-24? ( a b c d -- ? ) [ some-rots do-something some-rots do-something maybe-swap do-something 24 = ] [ 4drop ] if-amb ;
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: vector-24-able? ( vector -- t/f ) [ makes-24? ] with-datastack first ;
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: q ( -- obj ) "quit" ;
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: show-commands ( -- ) "Commands: " write "commands" get unparse print ;
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: report ( vector -- ) unparse print show-commands ;
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: give-help ( -- ) "Command not found..." print show-commands ;
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: find-word ( string choices -- word ) [ name>> = ] with find nip ;
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: obtain-word ( -- word ) readln "commands" get find-word dup [ drop give-help obtain-word ] unless ;
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: done? ( vector -- t/f ) 1 swap length = ;
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: victory? ( vector -- t/f ) V{ 24 } = ;
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: apply-word ( vector word -- vector ) 1quotation with-datastack >vector ;
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: update-commands ( vector -- ) length 3 < [ "commands" [ \ rot swap remove ] change ] [ ] if ;
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DEFER: check-status
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: quit-game ( vector -- ) drop "you're a quitter" print ;
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: quit? ( vector -- t/f ) peek "quit" = ;
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: end-game ( vector -- ) dup victory? [ drop "You WON!" ] [ pop number>string " is not 24... You lose." append ] if print ;
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: repeat ( vector -- ) dup report obtain-word apply-word dup update-commands check-status ;
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: check-status ( object -- ) dup done? [ end-game ] [ dup quit? [ quit-game ] [ repeat ] if ] if ;
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: build-quad ( -- vector ) 4 [ 10 random ] replicate >vector ;
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: 24-able ( -- vector ) build-quad dup vector-24-able? [ drop build-quad ] unless ;
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: set-commands ( -- ) { + - * / rot swap q } "commands" set ;
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: play-game ( -- ) set-commands 24-able repeat ;
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