72 lines
2.6 KiB
OCaml
72 lines
2.6 KiB
OCaml
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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| TupleType of ftype * ftype
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| FunctionType of ftype * ftype
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type t_exp =
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Integer of int (* x := a *)
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| Boolean of bool (* v *)
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| Variable of variable (* x *)
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| Tuple of t_exp * t_exp (* (a, b) *)
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| Function of variable * ftype * t_exp (* lambda x: t. x *)
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| Application of t_exp * t_exp (* x x *)
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| Plus of t_exp * t_exp (* x + x *)
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| Minus of t_exp * t_exp (* x - x *)
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| Times of t_exp * t_exp (* x * x *)
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| Division of t_exp * t_exp (* x / x *)
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| Modulo of t_exp * t_exp (* x % x *)
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| Power of t_exp * t_exp (* x ^ x *)
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| PowerMod of t_exp * t_exp * t_exp (* (x ^ x) % x *)
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| Rand of t_exp (* rand(0, x) *)
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| BAnd of t_exp * t_exp (* x && x *)
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| BOr of t_exp * t_exp (* x || x *)
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| BNot of t_exp (* not x *)
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| First of t_exp (* fst x *)
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| Second of t_exp (* scn x *)
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| Cmp of t_exp * t_exp (* x == x *)
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| CmpLess of t_exp * t_exp (* x < x *)
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| CmpLessEq of t_exp * t_exp (* x <= x *)
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| CmpGreater of t_exp * t_exp (* x > x *)
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| CmpGreaterEq of t_exp * t_exp (* x >= x *)
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| IfThenElse of t_exp * t_exp * t_exp (* if b then c else c *)
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| LetIn of variable * t_exp * t_exp (* let x = x in x *)
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| LetFun of variable * variable * ftype * t_exp * t_exp
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(* let rec x. y: t. x in x*)
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type permittedValues =
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IntegerPermitted of int
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| BooleanPermitted of bool
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| TuplePermitted of permittedValues * permittedValues
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| FunctionPermitted of closure
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and closure = {
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input: variable;
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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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type base_error = [
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`AbsentAssignment of string
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| `WrongType of string
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]
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type typechecking_error = [
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| base_error
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| `WrongTypeSpecification of string
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]
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type error = [
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| base_error
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| `DivisionByZero of string
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]
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