(test (match-all {{1 2 3} {4 5 1} {6 1 7}} (List (Multiset Number))
        [<cons <cons $x _>
          <cons <cons $y _>
           <cons <cons $z _>
            <nil>>>>
         [x y z]]))

(test (match-all {{1 2 3 4 5} {4 5 1} {6 1 7 4}} (List (Multiset Number))
        [<cons <cons $n _>
          <cons <cons ,n _>
           <cons <cons ,n _>
            <nil>>>>
         n]))

(test (match (with $loop {1 @loop}) (List Number)
        {[<cons $m <cons $n _>> [m n]]
         [_ <not-ok>]}))

(test (let {[$pat <cons ,1 <nil>>]}
        (match {1} (Multiset Number)
          {[pat <ok>]
           [_ <not-ok>]})))

(test (match {1} (Multiset Number)
        {[(of {<nil> <cons ,1 <nil>>}) <ok>]
         [_ <not-ok>]}))

(test (let {[$loop <cons ,1 (of {<nil> loop})>]}
        (match {1 1 1 1} (Multiset Number)
          {[loop <ok>]
           [_ <not-ok>]})))

(test (match {1 1 1 1} (Multiset Number)
        {[(with $loop <cons ,1 (of {<nil> loop})>) <ok>]
         [_ <not-ok>]}))

(test (match {1 1 1 1} (Multiset Number)
        {[<cons ,1 (with $loop <cons ,1 (of {<nil> loop})>)> <ok>]
         [_ <not-ok>]}))

(test (match {0 1 0 1} (List Number)
        {[(of {<cons ,0 (with $loop (of {<cons ,0 loop> <cons ,1 loop> <nil>}))>
               <cons ,1 (with $loop (of {<cons ,0 loop> <cons ,1 loop> <nil>}))>})
          <ok>]
         [_ <ko>]}))

(test (match-all {<x> <y> <z>} (List Something) [<nioj $xs $ys> [xs ys]]))

(test (match-all {1 2 3} (List Number)
        [<join $hs $ts> [hs ts]]))

(test (match-all {1 2 3} (Multiset Number)
        [<join $hs $ts> [hs ts]]))

(test (match-all {1 2 3} (Set Number)
        [<join $hs $ts> [hs ts]]))

(test (match-all {1 2 3} (List Number)
        [<join $hs <cons $x $ts>> [hs x ts]]))

(test (match-all {1 2 3} (Multiset Number)
        [<join $hs <cons $x $ts>> [hs x ts]]))

(test (match-all {1 2 3} (Set Number)
        [<join $hs <cons $x $ts>> [hs x ts]]))

(test ((remove-collection Suit) {<club> <heart> <diamond>} {<club> <diamond>}))

(test (subcollections {<x> <y> <z>}))

(test (poker-hands {<card <club> 4>
                    <card <club> 2>
                    <card <club> 5>
                    <card <club> 1>
                    <card <club> 3>}))

(test (poker-hands {<card <diamond> 1>
                    <card <club> 2>
                    <card <club> 1>
                    <card <heart> 1>
                    <card <diamond> 2>}))

(test (poker-hands {<card <diamond> 4>
                    <card <club> 2>
                    <card <club> 5>
                    <card <heart> 1>
                    <card <diamond> 3>}))

(test (poker-hands {<card <diamond> 4>
                    <card <club> 10>
                    <card <club> 5>
                    <card <heart> 1>
                    <card <diamond> 3>}))

(test (match {2 7 7 2 7} (Multiset Number)
        {[<cons $m
           <cons ,m
            <cons ,m
             !<cons $n
               !<cons ,n
                 !<nil>>>>>>
          <ok>]
         [_ <ko>]}))

(test (match {5 2 1 3 4} (Multiset Number)
        {[<cons $n
           <cons ,(- n 1)
            <cons ,(- n 2)
             <cons ,(- n 3)
              <cons ,(- n 4)
               <nil>>>>>>
          <ok>]
         [_ <ko>]}))

(test (match-all {1 2 3 4 5} (Multiset Number)
        [<cons $n $rest> [n rest]]))

(test (let {[$f (lambda [$x] (+ (g x) 10))]
            [$g (lambda [$x] (+ x 1))]}
        (f 0)))

(define $Stick
  (lambda [$a]
    (type
      {[$var-match (lambda [$tgt] {tgt})]
       [$inductive-match
        (deconstructor
          {[nil []
            {[$tgt (match-all tgt (List a) [<nil> []])]
             }]
           [cons [a (List a)]
            {[$tgt {@(match-all tgt (List a) [<cons $x $xs> [x xs]])
                    @(match-all (reverse tgt) (List a) [<cons $x $xs> [x xs]])}]
             }]
           [join [(List a) (List a)]
            {[$tgt {@(match-all tgt (List a) [<join $xs $ys> [xs ys]])
                    @(match-all (reverse tgt) (List a) [<join $xs $ys> [xs ys]])}]
             }]
           })]
       [$equal? (lambda [$val $tgt]
                  (or ((type-ref (List a) equal?) val tgt)
                      ((type-ref (List a) equal?) val (reverse tgt))))]
       })))

(test (match-all {1 2 3} (Stick Number) [<cons $x $xs> [x xs]]))
(test (match-all {1 2 3} (Stick Number) [<join $xs $ys> [xs ys]]))
(test (match-all {1 2 3 4} (Stick Number) [<join $xs <cons $w $ys>> [xs w ys]]))
(test (match-all {1 2 3} (Stick Number) [,{3 2 1} <ok>]))


(match {2 7 7 2 7} (Multiset Number)
  {[<cons $m
     <cons ,m
      <cons ,m
       $tmp1>>>
    (match tmp1 (Multiset Number)
      {[<cons $n $tmp2>
        (match tmp2 (Multiset Number)
          {[<cons ,n $tmp3>
            (match tmp3 (Multiset Number)
              {[<nil> <ok>]})]})]})]
   [_ <ko>]})