Refactor
This commit is contained in:
elvis
12
lib/lang.ml
12
lib/lang.ml
@ -1,5 +1,13 @@
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module Exercises = Exercises
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module MiniImp = MiniImp
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(* -------------------------------- MINI IMP -------------------------------- *)
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module MiniImpTypes = MiniImp.Types
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module MiniFun = MiniFun
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module MiniImp = MiniImp.Semantics
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(* -------------------------------- MINI FUN -------------------------------- *)
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module MiniFunTypes = MiniFun.Types
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module MiniTyFun = MiniFun.TypeChecker
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module MiniFun = MiniFun.Semantics
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@ -1,60 +1,5 @@
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type variable = string
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module VariableMap = Map.Make(String)
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type ftype =
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IntegerType
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| BooleanType
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| FunctionType of ftype list * ftype
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type t_exp =
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Integer of int
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| Boolean of bool
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| Variable of variable
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| Function of variable list * ftype * t_exp
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| Application of t_exp * t_exp list
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| Plus of t_exp * t_exp
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| Minus of t_exp * t_exp
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| Times of t_exp * t_exp
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| Division of t_exp * t_exp
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| Modulo of t_exp * t_exp
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| Power of t_exp * t_exp
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| PowerMod of t_exp * t_exp * t_exp
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| Rand of t_exp
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| BAnd of t_exp * t_exp
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| BOr of t_exp * t_exp
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| BNot of t_exp
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| Cmp of t_exp * t_exp
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| CmpLess of t_exp * t_exp
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| CmpLessEq of t_exp * t_exp
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| CmpGreater of t_exp * t_exp
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| CmpGreaterEq of t_exp * t_exp
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| IfThenElse of t_exp * t_exp * t_exp
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| LetIn of variable * t_exp * t_exp
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| LetFun of variable * variable list * ftype * t_exp * t_exp
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type permittedValues =
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IntegerPermitted of int
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| BooleanPermitted of bool
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| FunctionPermitted of closure
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and closure = {
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inputList: variable list;
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body: t_exp;
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assignments: permittedValues VariableMap.t;
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recursiveness: variable option
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}
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type memory = {
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assignments: permittedValues VariableMap.t
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}
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exception AbsentAssignment of string
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exception WrongType of string
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exception DivisionByZero of string
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exception WrongArity of string
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exception WrongTypeSpecification of string
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module Utility = Utility;;
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module Utility = Utility
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open Types;;
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Random.self_init ()
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@ -80,8 +25,10 @@ let rec evaluate (mem: memory) (command: t_exp) =
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let funcClosure = (
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match (evaluate mem f) with
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FunctionPermitted ff -> ff
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| IntegerPermitted _ -> raise (WrongType ("Function is not a function, it's an integer"))
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| BooleanPermitted _ -> raise (WrongType ("Function is not a function, it's a boolean"))
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| IntegerPermitted _ -> raise (WrongType ("Function is not a function, "
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^ "it's an integer"))
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| BooleanPermitted _ -> raise (WrongType ("Function is not a function, "
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^ "it's a boolean"))
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) in
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let parmList = List.map (fun k -> evaluate mem k) xs in
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let rec helper m params values =
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@ -362,127 +309,3 @@ let reduce (program: t_exp) (iin : int) =
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match (evaluate mem program') with
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IntegerPermitted a -> a
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| _ -> raise (WrongType ("Main function doesn't return an integer"))
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let rec evaluate_type (program: t_exp) context =
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match program with
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Integer _ -> IntegerType
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| Boolean _ -> BooleanType
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| Variable x -> (match VariableMap.find_opt x context with
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None -> raise (AbsentAssignment ("The variable " ^ x ^ " is not defined."))
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| Some t -> t)
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| Function (xs, typef, fbody) -> (
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match typef with
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FunctionType (tin, tout) -> (
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if List.length xs != List.length tin then
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raise (WrongTypeSpecification "Type specification for function has wrong arity.")
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else
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let context1 = List.fold_left2 (fun acc x t -> VariableMap.add x t acc) context xs tin in
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match (evaluate_type fbody context1 = tout) with
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(false) -> raise (WrongTypeSpecification "Function does not return specified type.")
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| (true) -> typef
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)
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| _ -> raise (WrongTypeSpecification "Specification of function is not a function type.")
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)
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| Application (f, xs) -> (
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match evaluate_type f context with
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FunctionType (tin, tout) -> (
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let rec helper params typeparams =
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match (params, typeparams) with
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([], _) -> typeparams
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| (_, []) -> raise (WrongArity ("Function application has arity " ^
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(List.length tin |> string_of_int) ^
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", but was applied to " ^
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(List.length xs |> string_of_int) ^
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" parameters"))
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| (p::tlparams, v::tltypeparams) ->
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if evaluate_type p context = v then
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helper tlparams tltypeparams
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else
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raise (WrongType "Argument with wrong type.")
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in
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match helper xs tin with
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[] -> tout
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| t -> FunctionType (t, tout)
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)
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| _ -> raise (WrongType "Applying to a non function type")
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)
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| Plus (x, y)
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| Minus (x, y)
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| Times (x, y)
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| Division (x, y)
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| Modulo (x, y)
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| Power (x, y) -> (
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match (evaluate_type x context, evaluate_type y context) with
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| (IntegerType, IntegerType) -> IntegerType
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| (IntegerType, _) -> raise (WrongType "Second term is not an integer.")
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| (_, _) -> raise (WrongType "First term is not an integer.")
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)
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| PowerMod (x, y, z) -> (
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match (evaluate_type x context, evaluate_type y context, evaluate_type z context) with
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| (IntegerType, IntegerType, IntegerType) -> IntegerType
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| (IntegerType, IntegerType, _) -> raise (WrongType "Third term is not an integer.")
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| (IntegerType, _, _) -> raise (WrongType "Second term is not an integer.")
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| (_, _, _) -> raise (WrongType "First term is not an integer.")
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)
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| Rand (x) -> (
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match (evaluate_type x context) with
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| (IntegerType) -> IntegerType
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| (_) -> raise (WrongType "Term is not an integer.")
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)
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| BAnd (x, y)
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| BOr (x, y) -> (
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match (evaluate_type x context, evaluate_type y context) with
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| (BooleanType, BooleanType) -> BooleanType
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| (BooleanType, _) -> raise (WrongType "Second term is not a boolean.")
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| (_, _) -> raise (WrongType "First term is not a boolean.")
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)
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| BNot (x) -> (
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match (evaluate_type x context) with
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| (BooleanType) -> BooleanType
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| (_) -> raise (WrongType "Term is not a boolean.")
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)
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| Cmp (x, y)
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| CmpLess (x, y)
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| CmpLessEq (x, y)
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| CmpGreater (x, y)
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| CmpGreaterEq (x, y) -> (
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match (evaluate_type x context, evaluate_type y context) with
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| (IntegerType, IntegerType) -> BooleanType
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| (IntegerType, _) -> raise (WrongType "Second term is not an integer.")
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| (_, _) -> raise (WrongType "First term is not an integer.")
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)
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| IfThenElse (guard, if_exp, else_exp) -> (
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match (evaluate_type guard context, evaluate_type if_exp context, evaluate_type else_exp context) with
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(BooleanType, t1, t2) -> (
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if t1 = t2 then
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t1
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else
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raise (WrongType "If branches do not have the same type.")
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)
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| (_, _, _) -> raise (WrongType "If guard is not a boolean.")
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)
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| LetIn (x, xval, rest) ->
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let typex = evaluate_type xval context in
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evaluate_type rest (VariableMap.add x typex context)
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| LetFun (f, xs, typef, fbody, rest) ->
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match typef with
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FunctionType (tin, tout) -> (
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if List.length xs != List.length tin then
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raise (WrongArity "Type specification for function has wrong arity.")
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else
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let context1 = VariableMap.add f typef context in
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let context2 = List.fold_left2 (fun acc x t -> VariableMap.add x t acc) context1 xs tin in
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match (evaluate_type fbody context2 = tout, evaluate_type rest context1) with
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(false, _) -> raise (WrongTypeSpecification "Function does not return specified type."
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)
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| (true, t) -> t
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)
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| _ -> raise (WrongTypeSpecification "Specification of function is not a function type.")
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let typecheck (program: t_exp) =
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match evaluate_type program VariableMap.empty with
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FunctionType ([IntegerType], IntegerType) -> true
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| _ -> raise (WrongType "Program is not a function from int to int.")
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1
lib/miniFun/Semantics.mli
Normal file
1
lib/miniFun/Semantics.mli
Normal file
@ -0,0 +1 @@
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val reduce : Types.t_exp -> int -> int
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125
lib/miniFun/TypeChecker.ml
Normal file
125
lib/miniFun/TypeChecker.ml
Normal file
@ -0,0 +1,125 @@
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module Utility = Utility
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open Types;;
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Random.self_init ()
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let rec evaluate_type (program: t_exp) context =
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match program with
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Integer _ -> IntegerType
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| Boolean _ -> BooleanType
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| Variable x -> (match VariableMap.find_opt x context with
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None -> raise (AbsentAssignment ("The variable " ^ x ^ " is not defined."))
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| Some t -> t)
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| Function (xs, typef, fbody) -> (
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match typef with
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FunctionType (tin, tout) -> (
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if List.length xs != List.length tin then
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raise (WrongTypeSpecification "Type specification for function has wrong arity.")
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else
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let context1 = List.fold_left2 (fun acc x t -> VariableMap.add x t acc) context xs tin in
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match (evaluate_type fbody context1 = tout) with
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(false) -> raise (WrongTypeSpecification "Function does not return specified type.")
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| (true) -> typef
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)
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| _ -> raise (WrongTypeSpecification "Specification of function is not a function type.")
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)
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| Application (f, xs) -> (
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match evaluate_type f context with
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FunctionType (tin, tout) -> (
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let rec helper params typeparams =
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match (params, typeparams) with
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([], _) -> typeparams
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| (_, []) -> raise (WrongArity ("Function application has arity " ^
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(List.length tin |> string_of_int) ^
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", but was applied to " ^
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(List.length xs |> string_of_int) ^
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" parameters"))
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| (p::tlparams, v::tltypeparams) ->
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if evaluate_type p context = v then
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helper tlparams tltypeparams
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else
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raise (WrongType "Argument with wrong type.")
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in
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match helper xs tin with
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[] -> tout
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| t -> FunctionType (t, tout)
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)
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| _ -> raise (WrongType "Applying to a non function type")
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)
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| Plus (x, y)
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| Minus (x, y)
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| Times (x, y)
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| Division (x, y)
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| Modulo (x, y)
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| Power (x, y) -> (
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match (evaluate_type x context, evaluate_type y context) with
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| (IntegerType, IntegerType) -> IntegerType
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| (IntegerType, _) -> raise (WrongType "Second term is not an integer.")
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| (_, _) -> raise (WrongType "First term is not an integer.")
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)
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| PowerMod (x, y, z) -> (
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match (evaluate_type x context, evaluate_type y context, evaluate_type z context) with
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| (IntegerType, IntegerType, IntegerType) -> IntegerType
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| (IntegerType, IntegerType, _) -> raise (WrongType "Third term is not an integer.")
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| (IntegerType, _, _) -> raise (WrongType "Second term is not an integer.")
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| (_, _, _) -> raise (WrongType "First term is not an integer.")
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)
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| Rand (x) -> (
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match (evaluate_type x context) with
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| (IntegerType) -> IntegerType
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| (_) -> raise (WrongType "Term is not an integer.")
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)
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| BAnd (x, y)
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| BOr (x, y) -> (
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match (evaluate_type x context, evaluate_type y context) with
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| (BooleanType, BooleanType) -> BooleanType
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| (BooleanType, _) -> raise (WrongType "Second term is not a boolean.")
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| (_, _) -> raise (WrongType "First term is not a boolean.")
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)
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| BNot (x) -> (
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match (evaluate_type x context) with
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| (BooleanType) -> BooleanType
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| (_) -> raise (WrongType "Term is not a boolean.")
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)
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| Cmp (x, y)
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| CmpLess (x, y)
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| CmpLessEq (x, y)
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| CmpGreater (x, y)
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| CmpGreaterEq (x, y) -> (
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match (evaluate_type x context, evaluate_type y context) with
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| (IntegerType, IntegerType) -> BooleanType
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| (IntegerType, _) -> raise (WrongType "Second term is not an integer.")
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| (_, _) -> raise (WrongType "First term is not an integer.")
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)
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| IfThenElse (guard, if_exp, else_exp) -> (
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match (evaluate_type guard context, evaluate_type if_exp context, evaluate_type else_exp context) with
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(BooleanType, t1, t2) -> (
|
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if t1 = t2 then
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t1
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else
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raise (WrongType "If branches do not have the same type.")
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)
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| (_, _, _) -> raise (WrongType "If guard is not a boolean.")
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)
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| LetIn (x, xval, rest) ->
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let typex = evaluate_type xval context in
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evaluate_type rest (VariableMap.add x typex context)
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| LetFun (f, xs, typef, fbody, rest) ->
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match typef with
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FunctionType (tin, tout) -> (
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if List.length xs != List.length tin then
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raise (WrongArity "Type specification for function has wrong arity.")
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else
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let context1 = VariableMap.add f typef context in
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let context2 = List.fold_left2 (fun acc x t -> VariableMap.add x t acc) context1 xs tin in
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match (evaluate_type fbody context2 = tout, evaluate_type rest context1) with
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(false, _) -> raise (WrongTypeSpecification "Function does not return specified type."
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)
|
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| (true, t) -> t
|
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)
|
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| _ -> raise (WrongTypeSpecification "Specification of function is not a function type.")
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|
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let typecheck (program: t_exp) =
|
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match evaluate_type program VariableMap.empty with
|
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FunctionType ([IntegerType], IntegerType) -> true
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| _ -> raise (WrongType "Program is not a function from int to int.")
|
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1
lib/miniFun/TypeChecker.mli
Normal file
1
lib/miniFun/TypeChecker.mli
Normal file
@ -0,0 +1 @@
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val typecheck : Types.t_exp -> bool
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55
lib/miniFun/Types.ml
Normal file
55
lib/miniFun/Types.ml
Normal file
@ -0,0 +1,55 @@
|
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type variable = string
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module VariableMap = Map.Make(String)
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type ftype =
|
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IntegerType
|
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| BooleanType
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| FunctionType of ftype list * ftype
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|
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type t_exp =
|
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Integer of int
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| Boolean of bool
|
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| Variable of variable
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| Function of variable list * ftype * t_exp
|
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| Application of t_exp * t_exp list
|
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| Plus of t_exp * t_exp
|
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| Minus of t_exp * t_exp
|
||||
| Times of t_exp * t_exp
|
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| Division of t_exp * t_exp
|
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| Modulo of t_exp * t_exp
|
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| Power of t_exp * t_exp
|
||||
| PowerMod of t_exp * t_exp * t_exp
|
||||
| Rand of t_exp
|
||||
| BAnd of t_exp * t_exp
|
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| BOr of t_exp * t_exp
|
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| BNot of t_exp
|
||||
| Cmp of t_exp * t_exp
|
||||
| CmpLess of t_exp * t_exp
|
||||
| CmpLessEq of t_exp * t_exp
|
||||
| CmpGreater of t_exp * t_exp
|
||||
| CmpGreaterEq of t_exp * t_exp
|
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| IfThenElse of t_exp * t_exp * t_exp
|
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| LetIn of variable * t_exp * t_exp
|
||||
| LetFun of variable * variable list * ftype * t_exp * t_exp
|
||||
|
||||
type permittedValues =
|
||||
IntegerPermitted of int
|
||||
| BooleanPermitted of bool
|
||||
| FunctionPermitted of closure
|
||||
and closure = {
|
||||
inputList: variable list;
|
||||
body: t_exp;
|
||||
assignments: permittedValues VariableMap.t;
|
||||
recursiveness: variable option
|
||||
}
|
||||
|
||||
type memory = {
|
||||
assignments: permittedValues VariableMap.t
|
||||
}
|
||||
|
||||
exception AbsentAssignment of string
|
||||
exception WrongType of string
|
||||
exception DivisionByZero of string
|
||||
exception WrongArity of string
|
||||
exception WrongTypeSpecification of string
|
||||
@ -1,6 +1,7 @@
|
||||
type variable = string
|
||||
|
||||
module VariableMap : Map.S with type key = variable
|
||||
|
||||
type ftype =
|
||||
IntegerType
|
||||
| BooleanType
|
||||
@ -52,7 +53,3 @@ exception WrongType of string
|
||||
exception DivisionByZero of string
|
||||
exception WrongArity of string
|
||||
exception WrongTypeSpecification of string
|
||||
|
||||
val reduce : t_exp -> int -> int
|
||||
|
||||
val typecheck : t_exp -> bool
|
||||
@ -1,47 +1,4 @@
|
||||
type variable = string
|
||||
|
||||
type p_exp =
|
||||
Main of variable * variable * c_exp (* def main with input x output y as c *)
|
||||
and c_exp =
|
||||
Skip
|
||||
| Assignment of variable * a_exp (* x := a *)
|
||||
| Sequence of c_exp * c_exp (* c; c *)
|
||||
| If of b_exp * c_exp * c_exp (* if b then c else c *)
|
||||
| While of b_exp * c_exp (* while b do c *)
|
||||
| For of c_exp * b_exp * c_exp * c_exp (* for c; b; c do c *)
|
||||
and b_exp =
|
||||
Boolean of bool (* v *)
|
||||
| BAnd of b_exp * b_exp (* b and b *)
|
||||
| BOr of b_exp * b_exp (* b or b *)
|
||||
| BNot of b_exp (* not b *)
|
||||
| BCmp of a_exp * a_exp (* a = a *)
|
||||
| BCmpLess of a_exp * a_exp (* a < a *)
|
||||
| BCmpLessEq of a_exp * a_exp (* a <= a *)
|
||||
| BCmpGreater of a_exp * a_exp (* a > a *)
|
||||
| BCmpGreaterEq of a_exp * a_exp (* a >= a *)
|
||||
and a_exp =
|
||||
Variable of variable (* x *)
|
||||
| Integer of int (* n *)
|
||||
| Plus of a_exp * a_exp (* a + a *)
|
||||
| Minus of a_exp * a_exp (* a - a *)
|
||||
| Times of a_exp * a_exp (* a * a *)
|
||||
| Division of a_exp * a_exp (* a / a *)
|
||||
| Modulo of a_exp * a_exp (* a % a *)
|
||||
| Power of a_exp * a_exp (* a ^ a *)
|
||||
| PowerMod of a_exp * a_exp * a_exp (* a ^ a % a *)
|
||||
| Rand of a_exp (* rand(0, a) *)
|
||||
|
||||
|
||||
|
||||
module VariableMap = Map.Make(String)
|
||||
|
||||
type memory = {
|
||||
assignments: int VariableMap.t
|
||||
}
|
||||
|
||||
|
||||
exception AbsentAssignment of string
|
||||
exception DivisionByZero of string
|
||||
open Types
|
||||
|
||||
module Utility = Utility;;
|
||||
|
||||
3
lib/miniImp/Semantics.mli
Normal file
3
lib/miniImp/Semantics.mli
Normal file
@ -0,0 +1,3 @@
|
||||
open Types
|
||||
|
||||
val reduce : p_exp -> int -> int
|
||||
43
lib/miniImp/Types.ml
Normal file
43
lib/miniImp/Types.ml
Normal file
@ -0,0 +1,43 @@
|
||||
type variable = string
|
||||
|
||||
type p_exp =
|
||||
Main of variable * variable * c_exp (* def main with input x output y as c *)
|
||||
and c_exp =
|
||||
Skip
|
||||
| Assignment of variable * a_exp (* x := a *)
|
||||
| Sequence of c_exp * c_exp (* c; c *)
|
||||
| If of b_exp * c_exp * c_exp (* if b then c else c *)
|
||||
| While of b_exp * c_exp (* while b do c *)
|
||||
| For of c_exp * b_exp * c_exp * c_exp (* for c; b; c do c *)
|
||||
and b_exp =
|
||||
Boolean of bool (* v *)
|
||||
| BAnd of b_exp * b_exp (* b and b *)
|
||||
| BOr of b_exp * b_exp (* b or b *)
|
||||
| BNot of b_exp (* not b *)
|
||||
| BCmp of a_exp * a_exp (* a = a *)
|
||||
| BCmpLess of a_exp * a_exp (* a < a *)
|
||||
| BCmpLessEq of a_exp * a_exp (* a <= a *)
|
||||
| BCmpGreater of a_exp * a_exp (* a > a *)
|
||||
| BCmpGreaterEq of a_exp * a_exp (* a >= a *)
|
||||
and a_exp =
|
||||
Variable of variable (* x *)
|
||||
| Integer of int (* n *)
|
||||
| Plus of a_exp * a_exp (* a + a *)
|
||||
| Minus of a_exp * a_exp (* a - a *)
|
||||
| Times of a_exp * a_exp (* a * a *)
|
||||
| Division of a_exp * a_exp (* a / a *)
|
||||
| Modulo of a_exp * a_exp (* a % a *)
|
||||
| Power of a_exp * a_exp (* a ^ a *)
|
||||
| PowerMod of a_exp * a_exp * a_exp (* a ^ a % a *)
|
||||
| Rand of a_exp (* rand(0, a) *)
|
||||
|
||||
|
||||
|
||||
module VariableMap = Map.Make(String)
|
||||
|
||||
type memory = {
|
||||
assignments: int VariableMap.t
|
||||
}
|
||||
|
||||
exception AbsentAssignment of string
|
||||
exception DivisionByZero of string
|
||||
@ -40,5 +40,4 @@ type memory = {
|
||||
}
|
||||
|
||||
exception AbsentAssignment of string
|
||||
|
||||
val reduce : p_exp -> int -> int
|
||||
exception DivisionByZero of string
|
||||
Reference in New Issue
Block a user