275 lines
9.4 KiB
OCaml
275 lines
9.4 KiB
OCaml
[@@@warning "-27"] (* TODO *)
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[@@@warning "-32"] (* TODO *)
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[@@@warning "-30"]
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module SMap = Map.Make(String)
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module I = AST2.O
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module O = struct
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type asttodo = [`TODO] (* occurrences of asttodo will point to some part of the original parser AST *)
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type name_and_region = {name: string; orig: Region.t}
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type type_name = name_and_region
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type var_name = name_and_region
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type field_name = name_and_region
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type pattern =
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PVar of var_name
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| PWild
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| PInt of Z.t
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| PBytes of Hex.t
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| PString of string
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| PUnit
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| PFalse
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| PTrue
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| PNone
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| PSome of pattern
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| PCons of pattern * pattern
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| PNull
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| PRecord of (field_name * pattern) SMap.t
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type type_constructor =
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Option
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| List
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| Set
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| Map
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type type_expr_case =
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Sum of (type_name * type_expr) SMap.t
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| Record of (field_name * type_expr) SMap.t
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| TypeApp of type_constructor * (type_expr list)
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| Function of { arg: type_expr; ret: type_expr }
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| Ref of type_expr
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| String
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| Bytes
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| Int
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| Unit
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| Bool
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and type_expr = { type_expr: type_expr_case; name: type_name option; orig: Region.t }
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type typed_var = { name:var_name; ty:type_expr; orig: asttodo }
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type type_decl = { name: type_name; ty:type_expr; orig: asttodo }
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type expr_case =
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App of { operator: operator; arguments: expr list }
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| Var of typed_var
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| Constant of constant
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| Record of (field_name * expr) list
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| Lambda of lambda
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and expr = { expr: expr_case; ty:type_expr; orig: asttodo }
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and decl = { var: typed_var; value: expr; orig: asttodo }
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and lambda = {
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parameter: typed_var;
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declarations: decl list;
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instructions: instr list;
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result: expr;
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}
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and operator_case =
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Function of var_name
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| Constructor of var_name
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| UpdateField of field_name
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| GetField of field_name
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| Or | And | Lt | Leq | Gt | Geq | Equal | Neq | Cat | Cons | Add | Sub | Mult | Div | Mod
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| Neg | Not
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| Set
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| MapLookup
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and operator = { operator: operator_case; ty:type_expr; orig: asttodo }
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and constant =
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Unit
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| Int of Z.t | String of string | Bytes of Hex.t
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| False | True
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| Null
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| EmptySet
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| CNone
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and instr =
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Assignment of { name: var_name; value: expr; orig: asttodo }
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| While of { condition: expr; body: instr list; orig: asttodo }
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| ForCollection of { list: expr; var: var_name; body: instr list; orig: asttodo }
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| Match of { expr: expr; cases: (pattern * instr list) list; orig: asttodo }
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| ProcedureCall of { expr: expr; orig: asttodo } (* expr returns unit, drop the result. Similar to OCaml's ";". *)
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| Fail of { expr: expr; orig: asttodo }
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type ast = {
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types : type_decl list;
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storage_decl : typed_var;
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declarations : decl list;
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orig : AST.t
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}
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end
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type te = O.type_expr list SMap.t
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type ve = O.type_expr list SMap.t
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type tve = te * ve
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let fold_map f a l =
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let f (acc, l) elem =
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let acc', elem' = f acc elem
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in acc', (elem' :: l) in
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let last_acc, last_l = List.fold_left f (a, []) l
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in last_acc, List.rev last_l
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let map f l = List.rev (List.rev_map f l)
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let shadow (name : string) (typ : O.type_expr) (env : O.type_expr list SMap.t)
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: O.type_expr list SMap.t =
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SMap.update name (function None -> Some [typ] | Some tl -> Some (typ :: tl)) env
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let lookup (name : string) (env : O.type_expr list SMap.t) : O.type_expr =
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match SMap.find name env with
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latest :: shadowed -> latest
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| [] -> failwith "Unbound variable"
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let string_of_name ({name;_} : I.name_and_region) = name
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let a_name_and_region ({name; orig} : I.name_and_region) : O.name_and_region =
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{name; orig}
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let a_type_constructor (tve : tve) : I.type_constructor -> O.type_constructor = function
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Option -> Option
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| List -> List
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| Set -> Set
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| Map -> Map
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let a_type_expr_case (tve : tve) : I.type_expr_case -> O.type_expr_case = function
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Sum lt -> failwith "TODO"
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| Record lt -> failwith "TODO"
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| TypeApp (tc, args) -> failwith "TODO"
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| Function {arg;ret} -> failwith "TODO"
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| Ref t -> failwith "TODO"
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| String -> String
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| Int -> Int
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| Unit -> Unit
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| Bool -> Bool
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let a_type_expr (tve : tve) ({type_expr;name;orig} : I.type_expr) : O.type_expr =
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let type_expr = a_type_expr_case tve type_expr in
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let name = match name with
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None -> None
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|Some name -> Some (a_name_and_region name)
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in {type_expr;name;orig}
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let a_type (te,ve : tve) ({name;ty;orig} : I.type_decl) : tve * O.type_decl =
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let ty = a_type_expr (te,ve) ty in
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let tve = shadow (string_of_name name) ty te, ve in
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let name = (a_name_and_region name) in
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tve, {name; ty; orig}
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let a_types (tve : tve) (l : I.type_decl list) : tve * O.type_decl list =
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fold_map a_type tve l
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let a_storage_decl : tve -> I.typed_var -> tve * O.typed_var =
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failwith "TODO"
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let type_expr_case_equal (t1 : O.type_expr_case) (t2 : O.type_expr_case) : bool = match t1,t2 with
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Sum m1, Sum m2 -> failwith "TODO" (* of (O.name_and_region * O.type_expr) SMap.t *)
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| Record m1, Record m2 -> failwith "TODO" (* of (O.name_and_region * O.type_expr) SMap.t *)
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| TypeApp (tc1, args1), TypeApp (tc2, args2) -> failwith "TODO" (* of O.type_constructor * O.type_expr list *)
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| Function {arg=arg1;ret=ret1}, Function {arg=arg2;ret=ret2} -> failwith "TODO" (* of { arg : O.type_expr; ret : O.type_expr; } *)
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| Ref t1, Ref t2 -> failwith "TODO" (* of O.type_expr *)
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| String, String -> true
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| Int, Int -> true
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| Unit, Unit -> true
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| Bool, Bool -> true
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| _ -> false
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let type_expr_equal (t1 : O.type_expr) (t2 : O.type_expr) : bool =
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type_expr_case_equal t1.type_expr t2.type_expr
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let check_type_expr_equal (expected : O.type_expr) (actual : O.type_expr) : unit =
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if type_expr_equal expected actual then
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()
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else
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failwith "got [actual] but expected [expected]"
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let a_var_expr (te,ve : tve) (expected : O.type_expr) (var_name : I.name_and_region) : O.expr_case =
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check_type_expr_equal expected (lookup (string_of_name var_name) ve);
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Var { name = a_name_and_region var_name;
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ty = expected;
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orig = `TODO }
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let a_constant_expr (tve : tve) (expected : O.type_expr) (constant : I.constant) : O.expr_case =
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let to_type_expr type_expr_case : O.type_expr =
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{ type_expr = type_expr_case; name = None; orig = Region.ghost } in
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let actual : O.type_expr = match constant with
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Unit -> to_type_expr Unit
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| Int _ -> to_type_expr Int
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| String _ -> to_type_expr String
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| Bytes _ -> to_type_expr Bytes
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| False -> to_type_expr Bool
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| True -> to_type_expr Bool
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| Null t -> a_type_expr tve t
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| EmptySet t -> a_type_expr tve t
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| CNone t -> a_type_expr tve t
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in
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check_type_expr_equal expected actual;
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let c : O.constant = match constant with
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Unit -> Unit
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| Int i -> Int i
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| String s -> String s
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| Bytes b -> Bytes b
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| False -> False
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| True -> True
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| Null _ -> Null
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| EmptySet _ -> EmptySet
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| CNone _ -> CNone
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in Constant c
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let map_to_list m =
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List.rev (SMap.fold (fun field_name_string p l -> p :: l) m [])
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let a_field tve (expected,expr) =
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failwith "TODO"
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let a_record (tve : tve) (expected : O.type_expr) (record : (I.field_name * I.expr) list)
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: O.expr_case =
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let {type_expr = expected; _} : O.type_expr = expected in
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let expected = match expected with
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Record fields -> fields
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| _ -> failwith "expected some_type but got record" in
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let expected_and_field =
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List.combine
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(map_to_list expected)
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record (* TODO SHOULD BE (map_to_list record) *) in
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Record (map (a_field tve) expected_and_field)
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let a_expr_case (te,ve : tve) (expected : O.type_expr) : I.expr -> O.expr_case = function
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App {operator;arguments} -> failwith "TODO"
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| Var var_name -> a_var_expr (te,ve) expected var_name
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| Constant constant -> a_constant_expr (te,ve) expected constant
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| Record record -> a_record (te,ve) expected record
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| Lambda lambda -> failwith "TODO"
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let a_expr (te,ve : tve) (expected : O.type_expr) (e : I.expr) : O.expr =
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let expr_case = a_expr_case (te,ve) expected e in
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{ expr = expr_case; ty = expected; orig = `TODO }
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let a_declaration (te,ve : tve) ({name;ty;value} : I.decl) : tve * O.decl =
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let ty = a_type_expr (te,ve) ty in
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let value = a_expr (te,ve) ty value in
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let ve = shadow (string_of_name name) ty ve in
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let name = a_name_and_region name in
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(te,ve), {var={name;ty;orig=`TODO};value;orig = `TODO}
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let a_declarations (tve : tve) (l : I.decl list) : tve * O.decl list =
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fold_map a_declaration tve l
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let a_ast I.{types; storage_decl; declarations; orig} =
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let tve = SMap.empty, SMap.empty in
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let tve, types = a_types tve types in
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let tve, storage_decl = a_storage_decl tve storage_decl in
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let tve, declarations = a_declarations tve declarations in
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let _ = tve in
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O.{types; storage_decl; declarations; orig}
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let annotate : I.ast -> O.ast = a_ast
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