#interpreter.scm#2#

#reader(lib"read.ss""wxme")WXME0108 ## 
#|
   This file uses the GRacket editor format.
   Open this file in DrRacket version 6.12 or later to read it.

   Most likely, it was created by saving a program in DrRacket,
   and it probably contains a program with non-text elements
   (such as images or comment boxes).

            http://racket-lang.org/
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(
 #"; defining a function for try statement so that it returns a state a"
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0 0 14 3 7 #"call/cc"
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0 0 14 3 7 #"tryBody"
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0 0 24 3 3 #") ("
0 0 14 3 33 #"M_state_Declaration_updateBinding"
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0 0 14 3 4 #"bind"
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0 0 14 3 5 #"throw"
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0 0 14 3 11 #"breakReturn"
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0 0 24 3 19 #"                   "
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0 0 14 3 11 #"throwReturn"
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0 0 14 3 11 #"breakReturn"
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0 0 24 3 13 #"             "
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0 0 14 3 11 #"breakReturn"
0 0 24 3 3 #")))"
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0 0 24 29 1 #"\n"
0 0 24 29 1 #"\n"
0 0 24 29 1 #"\n"
0 0 24 29 1 #"\n"
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(
 #";-------------------------------------------------------------------"
 #"---------------------------------"
) 0 0 24 29 1 #"\n"
0 0 17 3 101
(
 #";------------------------------------State Implementation-----------"
 #"---------------------------------"
) 0 0 24 29 1 #"\n"
0 0 17 3 95
(
 #"; the following are functions written to hide state implementation f"
 #"rom the rest of interpreter"
) 0 0 24 29 1 #"\n"
0 0 24 29 1 #"\n"
0 0 17 3 93
(
 #"; This implementation of the state is a list of list of pairs, each "
 #"list of pairs is a layer,"
) 0 0 24 29 1 #"\n"
0 0 17 3 50 #"; each pair contains a variable name and its value"
0 0 24 29 1 #"\n"
0 0 24 29 1 #"\n"
0 0 17 3 90
(
 #"; defining a function that updates the bindings in a given state in "
 #"a delaration statement"
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0 0 24 3 1 #"("
0 0 15 3 6 #"define"
0 0 24 3 1 #" "
0 0 14 3 33 #"M_state_Declaration_updateBinding"
0 0 24 29 1 #"\n"
0 0 24 3 3 #"  ("
0 0 15 3 6 #"lambda"
0 0 24 3 2 #" ("
0 0 14 3 7 #"binding"
0 0 24 3 1 #" "
0 0 14 3 5 #"state"
0 0 24 3 1 #")"
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0 0 24 3 5 #"    ("
0 0 15 3 4 #"cond"
0 0 24 29 1 #"\n"
0 0 24 3 8 #"      (("
0 0 14 3 3 #"eq?"
0 0 24 3 2 #" ("
0 0 14 3 3 #"key"
0 0 24 3 1 #" "
0 0 14 3 7 #"binding"
0 0 24 3 2 #") "
0 0 21 3 1 #"'"
0 0 14 3 14 #"M_state_return"
0 0 24 3 3 #") ("
0 0 14 3 4 #"cons"
0 0 24 3 2 #" ("
0 0 14 3 10 #"addBinding"
0 0 24 3 1 #" "
0 0 14 3 7 #"binding"
0 0 24 3 2 #" ("
0 0 14 3 8 #"topLayer"
0 0 24 3 1 #" "
0 0 14 3 5 #"state"
0 0 24 3 4 #")) ("
0 0 14 3 13 #"getAfterFirst"
0 0 24 3 1 #" "
0 0 14 3 5 #"state"
0 0 24 3 3 #")))"
0 0 24 29 1 #"\n"
0 0 24 3 8 #"      (("
0 0 14 3 4 #"assq"
0 0 24 3 2 #" ("
0 0 14 3 3 #"key"
0 0 24 3 1 #" "
0 0 14 3 7 #"binding"
0 0 24 3 3 #") ("
0 0 14 3 8 #"topLayer"
0 0 24 3 1 #" "
0 0 14 3 5 #"state"
0 0 24 3 4 #")) ("
0 0 14 3 5 #"error"
0 0 24 3 1 #" "
0 0 19 3 27 #"\"Variable already declared\""
0 0 24 3 2 #"))"
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0 0 24 3 7 #"      ("
0 0 14 3 4 #"else"
0 0 24 3 2 #" ("
0 0 14 3 4 #"cons"
0 0 24 3 2 #" ("
0 0 14 3 10 #"addBinding"
0 0 24 3 1 #" "
0 0 14 3 7 #"binding"
0 0 24 3 2 #" ("
0 0 14 3 8 #"topLayer"
0 0 24 3 1 #" "
0 0 14 3 5 #"state"
0 0 24 3 4 #")) ("
0 0 14 3 13 #"getAfterFirst"
0 0 24 3 1 #" "
0 0 14 3 5 #"state"
0 0 24 3 6 #"))))))"
0 0 24 29 1 #"\n"
0 0 24 29 1 #"\n"
0 0 17 3 45 #"; defining a function that declares functions"
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0 0 24 3 1 #"("
0 0 15 3 6 #"define"
0 0 24 3 1 #" "
0 0 14 3 28 #"M_state_Declaration_function"
0 0 24 29 1 #"\n"
0 0 24 3 3 #"  ("
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0 0 14 3 8 #"function"
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0 0 14 3 5 #"state"
0 0 24 3 1 #")"
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0 0 24 3 5 #"    ("
0 0 14 3 3 #"add"
0 0 24 3 2 #" ("
0 0 14 3 3 #"add"
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0 0 14 3 8 #"topLayer"
0 0 24 3 1 #" "
0 0 14 3 5 #"state"
0 0 24 3 4 #")) ("
0 0 14 3 13 #"getAfterFirst"
0 0 24 3 1 #" "
0 0 14 3 5 #"state"
0 0 24 3 4 #"))))"
0 0 24 29 1 #"\n"
0 0 24 29 1 #"\n"
0 0 17 3 40 #"; defining a class that declares classes"
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0 0 24 3 1 #"("
0 0 15 3 6 #"define"
0 0 24 3 1 #" "
0 0 14 3 25 #"M_state_Declaration_class"
0 0 24 29 1 #"\n"
0 0 24 3 3 #"  ("
0 0 15 3 6 #"lambda"
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0 0 15 3 5 #"class"
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0 0 14 3 5 #"state"
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0 0 14 3 8 #"topLayer"
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0 0 14 3 5 #"state"
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0 0 14 3 13 #"getAfterFirst"
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0 0 24 3 4 #"))))"
0 0 24 29 1 #"\n"
0 0 24 29 1 #"\n"
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(
 #"; defining a function that updates the bindings in a given state in "
 #"a assignment statement"
) 0 0 24 29 1 #"\n"
0 0 24 3 1 #"("
0 0 15 3 6 #"define"
0 0 24 3 1 #" "
0 0 14 3 36 #"M_state_Assignment_updateBinding-cps"
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0 0 24 3 3 #"  ("
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0 0 24 3 2 #" ("
0 0 14 3 7 #"binding"
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0 0 14 3 5 #"state"
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0 0 14 3 9 #"cpsreturn"
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0 0 24 3 4 #"    "
0 0 17 3 10 #";(display "
0 0 17 3 7 #"binding"
0 0 17 3 11 #") (newline)"
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0 0 24 3 5 #"    ("
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0 0 14 3 5 #"error"
0 0 24 3 1 #" "
0 0 19 3 23 #"\"Variable not declared\""
0 0 24 3 3 #")))"
0 0 24 29 1 #"\n"
0 0 24 3 7 #"       "
0 0 17 3 52 #";if the variable is already declared, update the box"
0 0 24 29 1 #"\n"
0 0 24 3 9 #"       (("
0 0 14 3 4 #"assq"
0 0 24 3 2 #" ("
0 0 14 3 3 #"key"
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0 0 14 3 7 #"binding"
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0 0 14 3 8 #"topLayer"
0 0 24 3 1 #" "
0 0 14 3 5 #"state"
0 0 24 3 4 #")) ("
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0 0 24 3 2 #" ("
0 0 14 3 9 #"updateBox"
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0 0 24 3 2 #" ("
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0 0 24 3 8 #"       ("
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0 0 24 3 2 #" ("
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0 0 24 3 1 #" "
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0 0 14 3 8 #"topLayer"
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0 0 14 3 5 #"state"
0 0 24 3 2 #") "
0 0 14 3 1 #"v"
0 0 24 3 8 #"))))))))"
0 0 24 29 1 #"\n"
0 0 24 29 1 #"\n"
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0 0 24 29 1 #"\n"
0 0 24 3 1 #"("
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0 0 14 3 9 #"updateBox"
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0 0 24 3 2 #" ("
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0 0 14 3 10 #"newbinding"
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0 0 14 3 5 #"state"
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0 0 15 3 5 #"begin"
0 0 24 3 2 #" ("
0 0 14 3 8 #"set-box!"
0 0 24 3 2 #" ("
0 0 14 3 9 #"getSecond"
0 0 24 3 1 #" "
0 0 14 3 10 #"oldbinding"
0 0 24 3 3 #") ("
0 0 14 3 5 #"unbox"
0 0 24 3 2 #" ("
0 0 14 3 9 #"getSecond"
0 0 24 3 1 #" "
0 0 14 3 10 #"newbinding"
0 0 24 3 4 #"))) "
0 0 14 3 5 #"state"
0 0 24 3 3 #")))"
0 0 24 29 1 #"\n"
0 0 24 29 1 #"\n"
0 0 17 3 61
#"; defining a wrapper for M_State_Assignment_updateBinding-cps"
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0 0 24 3 1 #"("
0 0 15 3 6 #"define"
0 0 24 3 1 #" "
0 0 14 3 32 #"M_state_Assignment_updateBinding"
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0 0 24 3 3 #"  ("
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0 0 14 3 7 #"binding"
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0 0 14 3 36 #"M_state_Assignment_updateBinding-cps"
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0 0 24 29 1 #"\n"
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(
 #"; defining a function that returns a value of a variable if initiali"
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) 0 0 24 29 1 #"\n"
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0 0 14 3 5 #"state"
0 0 24 3 1 #")"
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0 0 17 3 5 #"state"
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0 0 17 3 3 #") ("
0 0 17 3 8 #"newline)"
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0 0 24 3 3 #")))"
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0 0 14 3 3 #"var"
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0 0 24 3 3 #")))"
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0 0 14 3 13 #"getAfterFirst"
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0 0 14 3 7 #"findvar"
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0 0 14 3 3 #"var"
0 0 24 3 1 #" "
0 0 14 3 5 #"state"
0 0 24 3 3 #")))"
0 0 24 29 1 #"\n"
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0 0 14 3 5 #"error"
0 0 24 3 1 #" "
0 0 19 3 24 #"\"Variable not declared!\""
0 0 24 3 5 #")))))"
0 0 24 29 1 #"\n"
0 0 24 29 1 #"\n"
0 0 17 3 138
(
 #"; defining a function that adds a binding if the top layer does not "
 #"contain it and return error if it is already declared in the top lay"
 #"er"
) 0 0 24 29 1 #"\n"
0 0 24 3 1 #"("
0 0 15 3 6 #"define"
0 0 24 3 1 #" "
0 0 14 3 15 #"declareLocalVar"
0 0 24 29 1 #"\n"
0 0 24 3 3 #"  ("
0 0 15 3 6 #"lambda"
0 0 24 3 2 #" ("
0 0 14 3 7 #"binding"
0 0 24 3 1 #" "
0 0 14 3 5 #"state"
0 0 24 3 1 #")"
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0 0 24 29 1 #"\n"
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0 0 14 3 4 #"assq"
0 0 24 3 2 #" ("
0 0 14 3 3 #"key"
0 0 24 3 1 #" "
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0 0 24 3 3 #") ("
0 0 14 3 8 #"topLayer"
0 0 24 3 1 #" "
0 0 14 3 5 #"state"
0 0 24 3 4 #")) ("
0 0 14 3 5 #"error"
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0 0 19 3 34 #"\"Local variable already declared!\""
0 0 24 3 2 #"))"
0 0 24 29 1 #"\n"
0 0 24 3 7 #"      ("
0 0 14 3 4 #"else"
0 0 24 3 2 #" ("
0 0 14 3 33 #"M_state_Declaration_updateBinding"
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0 0 14 3 7 #"binding"
0 0 24 3 1 #" "
0 0 14 3 5 #"state"
0 0 24 3 5 #")))))"
0 0 24 29 1 #"\n"
0 0 24 29 1 #"\n"
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(
 #"; defining a function that returns a function if defined or an error"
 #" msg if not"
) 0 0 24 29 1 #"\n"
0 0 24 3 1 #"("
0 0 15 3 6 #"define"
0 0 24 3 1 #" "
0 0 14 3 10 #"lookupfunc"
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0 0 24 3 3 #"  ("
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0 0 24 3 2 #" ("
0 0 14 3 4 #"name"
0 0 24 3 1 #" "
0 0 14 3 5 #"state"
0 0 24 3 1 #")"
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0 0 24 3 4 #"    "
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0 0 24 3 5 #"    ("
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0 0 24 3 8 #"      (("
0 0 14 3 5 #"null?"
0 0 24 3 1 #" "
0 0 14 3 5 #"state"
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0 0 14 3 5 #"error"
0 0 24 3 1 #" "
0 0 19 3 23 #"\"Function not defined!\""
0 0 24 3 2 #"))"
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0 0 14 3 5 #"list?"
0 0 24 3 1 #" "
0 0 14 3 4 #"name"
0 0 24 3 3 #") ("
0 0 14 3 10 #"lookupfunc"
0 0 24 3 2 #" ("
0 0 14 3 8 #"getThird"
0 0 24 3 1 #" "
0 0 14 3 4 #"name"
0 0 24 3 3 #") ("
0 0 14 3 13 #"getAfterFirst"
0 0 24 3 2 #" ("
0 0 14 3 11 #"lookupclass"
0 0 24 3 2 #" ("
0 0 14 3 9 #"getSecond"
0 0 24 3 2 #" ("
0 0 14 3 14 #"getDotInstance"
0 0 24 3 2 #" ("
0 0 14 3 9 #"getSecond"
0 0 24 3 1 #" "
0 0 14 3 4 #"name"
0 0 24 3 2 #") "
0 0 14 3 5 #"state"
0 0 24 3 3 #")) "
0 0 14 3 5 #"state"
0 0 24 3 4 #"))))"
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0 0 24 3 2 #" ("
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0 0 24 3 1 #" "
0 0 21 3 1 #"'"
0 0 14 3 8 #"function"
0 0 24 3 2 #" ("
0 0 14 3 8 #"topLayer"
0 0 24 3 1 #" "
0 0 14 3 5 #"state"
0 0 24 3 4 #")) ("
0 0 14 3 6 #"equal?"
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0 0 24 3 2 #" ("
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0 0 24 3 1 #" "
0 0 21 3 1 #"'"
0 0 14 3 8 #"function"
0 0 24 3 2 #" ("
0 0 14 3 8 #"topLayer"
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0 0 14 3 5 #"state"
0 0 24 3 4 #"))) "
0 0 14 3 4 #"name"
0 0 24 3 2 #"))"
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0 0 14 3 4 #"assq"
0 0 24 3 1 #" "
0 0 21 3 1 #"'"
0 0 14 3 8 #"function"
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0 0 14 3 8 #"topLayer"
0 0 24 3 1 #" "
0 0 14 3 5 #"state"
0 0 24 3 3 #")))"
0 0 24 29 1 #"\n"
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0 0 14 3 4 #"assq"
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0 0 21 3 1 #"'"
0 0 14 3 8 #"function"
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0 0 14 3 8 #"topLayer"
0 0 24 3 1 #" "
0 0 14 3 5 #"state"
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0 0 14 3 10 #"lookupfunc"
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0 0 14 3 4 #"name"
0 0 24 3 2 #" ("
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0 0 24 3 2 #" ("
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0 0 24 3 2 #" ("
0 0 14 3 8 #"topLayer"
0 0 24 3 1 #" "
0 0 14 3 5 #"state"
0 0 24 3 5 #")))))"
0 0 24 29 1 #"\n"
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0 0 14 3 4 #"name"
0 0 24 3 2 #" ("
0 0 14 3 13 #"getAfterFirst"
0 0 24 3 1 #" "
0 0 14 3 5 #"state"
0 0 24 3 6 #"))))))"
0 0 24 29 1 #"\n"
0 0 24 29 1 #"\n"
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(
 #"; defining a function that finds the binding of the variable in stat"
 #"e"
) 0 0 24 29 1 #"\n"
0 0 24 3 1 #"("
0 0 15 3 6 #"define"
0 0 24 3 1 #" "
0 0 14 3 11 #"findvar-cps"
0 0 24 29 1 #"\n"
0 0 24 3 3 #"  ("
0 0 15 3 6 #"lambda"
0 0 24 3 2 #" ("
0 0 14 3 3 #"var"
0 0 24 3 1 #" "
0 0 14 3 5 #"state"
0 0 24 3 1 #" "
0 0 14 3 9 #"cpsreturn"
0 0 24 3 1 #")"
0 0 24 29 1 #"\n"
0 0 24 3 4 #"    "
0 0 17 3 25 #";(display state)(newline)"
0 0 24 29 1 #"\n"
0 0 24 3 5 #"    ("
0 0 15 3 4 #"cond"
0 0 24 29 1 #"\n"
0 0 24 3 9 #"       (("
0 0 14 3 5 #"null?"
0 0 24 3 1 #" "
0 0 14 3 5 #"state"
0 0 24 3 3 #") ("
0 0 14 3 9 #"cpsreturn"
0 0 24 3 1 #" "
0 0 21 3 2 #"#f"
0 0 24 3 2 #"))"
0 0 24 29 1 #"\n"
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0 0 14 3 4 #"assq"
0 0 24 3 1 #" "
0 0 14 3 3 #"var"
0 0 24 3 2 #" ("
0 0 14 3 8 #"topLayer"
0 0 24 3 1 #" "
0 0 14 3 5 #"state"
0 0 24 3 4 #")) ("
0 0 14 3 9 #"cpsreturn"
0 0 24 3 2 #" ("
0 0 14 3 4 #"assq"
0 0 24 3 1 #" "
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0 0 24 3 2 #" ("
0 0 14 3 8 #"topLayer"
0 0 24 3 1 #" "
0 0 14 3 5 #"state"
0 0 24 3 4 #"))))"
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0 0 24 3 8 #"       ("
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0 0 24 3 2 #" ("
0 0 14 3 9 #"cpsreturn"
0 0 24 3 2 #" ("
0 0 14 3 11 #"findvar-cps"
0 0 24 3 1 #" "
0 0 14 3 3 #"var"
0 0 24 3 2 #" ("
0 0 14 3 13 #"getAfterFirst"
0 0 24 3 1 #" "
0 0 14 3 5 #"state"
0 0 24 3 2 #") "
0 0 14 3 9 #"cpsreturn"
0 0 24 3 6 #"))))))"
0 0 24 29 1 #"\n"
0 0 24 29 1 #"\n"
0 0 17 3 36 #"; defining a wrapper for findvar-cps"
0 0 24 29 1 #"\n"
0 0 24 3 1 #"("
0 0 15 3 6 #"define"
0 0 24 3 1 #" "
0 0 14 3 7 #"findvar"
0 0 24 29 1 #"\n"
0 0 24 3 3 #"  ("
0 0 15 3 6 #"lambda"
0 0 24 3 2 #" ("
0 0 14 3 3 #"var"
0 0 24 3 1 #" "
0 0 14 3 5 #"state"
0 0 24 3 1 #")"
0 0 24 29 1 #"\n"
0 0 24 3 5 #"    ("
0 0 14 3 11 #"findvar-cps"
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