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typer.ml
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typer.ml
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(*
The Haxe Compiler
Copyright (C) 2005-2019 Haxe Foundation
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*)
open Extlib_leftovers
open Ast
open DisplayTypes.DisplayMode
open DisplayTypes.CompletionResultKind
open CompletionItem.ClassFieldOrigin
open Common
open Type
open Typecore
open Resolution
open Error
open Globals
open TyperBase
open Fields
open CallUnification
open Calls
open Operators
(* ---------------------------------------------------------------------- *)
(* TOOLS *)
let mono_or_dynamic ctx with_type p = match with_type with
| WithType.NoValue ->
t_dynamic
| Value _ | WithType _ ->
spawn_monomorph ctx.e p
let get_iterator_param t =
match follow t with
| TAnon a ->
if !(a.a_status) <> Closed then raise Not_found;
(match follow (PMap.find "hasNext" a.a_fields).cf_type, follow (PMap.find "next" a.a_fields).cf_type with
| TFun ([],tb), TFun([],t) when (match follow tb with TAbstract ({ a_path = [],"Bool" },[]) -> true | _ -> false) ->
if PMap.fold (fun _ acc -> acc + 1) a.a_fields 0 <> 2 then raise Not_found;
t
| _ ->
raise Not_found)
| _ ->
raise Not_found
let get_iterable_param t =
match follow t with
| TAnon a ->
if !(a.a_status) <> Closed then raise Not_found;
(match follow (PMap.find "iterator" a.a_fields).cf_type with
| TFun ([],it) ->
let t = get_iterator_param it in
if PMap.fold (fun _ acc -> acc + 1) a.a_fields 0 <> 1 then raise Not_found;
t
| _ ->
raise Not_found)
| _ -> raise Not_found
let get_own_resolution ctx = match ctx.m.own_resolution with
| Some resolution ->
resolution
| None ->
let rl = new resolution_list ["own";s_type_path ctx.m.curmod.m_path] in
Option.may (fun c ->
rl#add (class_statics_resolution c null_pos)
) ctx.m.curmod.m_statics;
List.iter (fun mt ->
rl#add (module_type_resolution mt None null_pos)
) ctx.m.curmod.m_types;
ctx.m.own_resolution <- Some rl;
rl
let maybe_type_against_enum ctx f with_type iscall p =
try
begin match with_type with
| WithType.WithType(t,_) ->
let rec loop stack t = match follow t with
| TEnum (en,_) ->
true,en.e_path,en.e_names,TEnumDecl en
| TAbstract ({a_impl = Some c} as a,_) when a.a_enum ->
let fields = ExtList.List.filter_map (fun cf ->
if has_class_field_flag cf CfEnum then Some cf.cf_name else None
) c.cl_ordered_statics in
false,a.a_path,fields,TAbstractDecl a
| TAbstract (a,pl) when not (Meta.has Meta.CoreType a.a_meta) ->
begin match get_abstract_froms ctx a pl with
| [(_,t2)] ->
if (List.exists (shallow_eq t) stack) then raise Exit;
loop (t :: stack) t2
| _ -> raise Exit
end
| _ ->
raise Exit
in
let is_enum,path,fields,mt = loop [] t in
let old = ctx.m.enum_with_type in
let restore () = ctx.m.enum_with_type <- old in
ctx.m.enum_with_type <- Some mt;
let e = try
f()
with
| Error { err_message = Unknown_ident n; err_sub = sub } ->
restore();
raise_or_display_message ctx (StringError.string_error n fields ("Identifier '" ^ n ^ "' is not part of " ^ s_type_path path)) p;
AKExpr (mk (TConst TNull) (mk_mono()) p)
| exc ->
restore();
raise exc;
in
restore();
begin match e with
| AKExpr e ->
begin match follow e.etype with
| TFun(_,t') when is_enum ->
(* TODO: this is a dodge for #7603 *)
(try Type.unify t' t with Unify_error _ -> ());
AKExpr e
| _ ->
AKExpr e
end
| _ -> e (* ??? *)
end
| _ ->
raise Exit
end
with Exit ->
f()
(* ---------------------------------------------------------------------- *)
(* PASS 3 : type expression & check structure *)
let rec unify_min_raise ctx (el:texpr list) : t =
let basic = ctx.com.basic in
match el with
| [] -> spawn_monomorph ctx.e null_pos
| [e] -> e.etype
| _ ->
let rec chk_null e = is_null e.etype || is_explicit_null e.etype ||
match e.eexpr with
| TConst TNull -> true
| TBlock el ->
(match List.rev el with
| [] -> false
| e :: _ -> chk_null e)
| TParenthesis e | TMeta(_,e) -> chk_null e
| _ -> false
in
(* First pass: Try normal unification and find out if null is involved. *)
let rec loop t = function
| [] ->
false, t
| e :: el ->
let t = if chk_null e then basic.tnull t else t in
try
Type.unify e.etype t;
loop t el
with Unify_error _ -> try
Type.unify t e.etype;
loop (if is_null t then basic.tnull e.etype else e.etype) el
with Unify_error _ ->
true, t
in
let has_error, t = loop (spawn_monomorph ctx.e null_pos) el in
if not has_error then
t
else try
(* specific case for const anon : we don't want to hide fields but restrict their common type *)
let fcount = ref (-1) in
let field_count a =
PMap.fold (fun _ acc -> acc + 1) a.a_fields 0
in
let expr f = match f.cf_expr with None -> mk (TBlock []) f.cf_type f.cf_pos | Some e -> e in
let fields = List.fold_left (fun acc e ->
match follow e.etype with
| TAnon a when !(a.a_status) = Const ->
if !fcount = -1 then begin
fcount := field_count a;
PMap.map (fun f -> [expr f]) a.a_fields
end else begin
if !fcount <> field_count a then raise Not_found;
PMap.mapi (fun n el -> expr (PMap.find n a.a_fields) :: el) acc
end
| _ ->
raise Not_found
) PMap.empty el in
let fields = PMap.foldi (fun n el acc ->
let t = try unify_min_raise ctx el with Unify_error _ -> raise Not_found in
PMap.add n (mk_field n t (List.hd el).epos null_pos) acc
) fields PMap.empty in
mk_anon ~fields (ref Closed)
with Not_found -> try
(* specific case for TFun, see #9579 *)
let e0,el = match el with
| e0 :: el -> e0,el
| _ -> raise Exit
in
let args,tr0 = match follow e0.etype with
| TFun(tl,tr) ->
Array.of_list tl,tr
| _ ->
raise Exit
in
let arity = Array.length args in
let rets = List.map (fun e -> match follow e.etype with
| TFun(tl,tr) ->
let ta = Array.of_list tl in
if Array.length ta <> arity then raise Exit;
for i = 0 to arity - 1 do
let (_,_,tcur) = args.(i) in
let (_,_,tnew) as argnew = ta.(i) in
if Type.does_unify tnew tcur then
args.(i) <- argnew
else if not (Type.does_unify tcur tnew) then
raise Exit
done;
tr
| _ ->
raise Exit
) el in
let common_types = UnifyMinT.collect_base_types tr0 in
let tr = match UnifyMinT.unify_min' default_unification_context common_types rets with
| UnifyMinOk t ->
t
| UnifyMinError(l,index) ->
raise Exit
in
TFun(Array.to_list args,tr)
with Exit ->
(* Second pass: Get all base types (interfaces, super classes and their interfaces) of most general type.
Then for each additional type filter all types that do not unify. *)
let common_types = UnifyMinT.collect_base_types t in
let dyn_types = List.fold_left (fun acc t ->
let rec loop c =
Meta.has Meta.UnifyMinDynamic c.cl_meta || (match c.cl_super with None -> false | Some (c,_) -> loop c)
in
match t with
| TInst (c,params) when params <> [] && loop c ->
TInst (c,List.map (fun _ -> t_dynamic) params) :: acc
| _ -> acc
) [] common_types in
let common_types = (match List.rev dyn_types with [] -> common_types | l -> common_types @ l) in
let el = List.tl el in
let tl = List.map (fun e -> e.etype) el in
begin match UnifyMinT.unify_min' default_unification_context common_types tl with
| UnifyMinOk t ->
t
| UnifyMinError(l,index) ->
raise_typing_error_ext (make_error (Unify l) (List.nth el index).epos)
end
let unify_min ctx el =
try unify_min_raise ctx el
with Error ({ err_message = Unify l } as err) ->
if not ctx.f.untyped then display_error_ext ctx.com err;
(List.hd el).etype
let unify_min_for_type_source ctx el src =
match src with
| Some WithType.ImplicitReturn when List.exists (fun e -> ExtType.is_void (follow e.etype)) el ->
ctx.com.basic.tvoid
| _ ->
unify_min ctx el
let enum_field_access ctx en ef mode p pt =
let et = type_module_type ctx (TEnumDecl en) p in
let wrap e =
let acc = AKExpr e in
let is_set = match mode with MSet _ -> true | _ -> false in
(* Should this really be here? *)
if is_set then
AKNo(acc,p)
else
acc
in
wrap (mk (TField (et,FEnum (en,ef))) (enum_field_type ctx en ef p) p)
let resolve_against_expected_enum ctx i =
let rec loop mt = match mt with
| TAbstractDecl ({a_impl = Some c} as a) when a.a_enum ->
let cf = PMap.find i c.cl_statics in
if not (has_class_field_flag cf CfEnum) then
raise Not_found;
static_abstract_field_resolution a c cf None null_pos
| TClassDecl _ | TAbstractDecl _ ->
raise Not_found
| TTypeDecl t ->
begin match follow t.t_type with
| TEnum (e,_) -> loop (TEnumDecl e)
| TAbstract (a,_) when a.a_enum -> loop (TAbstractDecl a)
| _ -> raise Not_found
end
| TEnumDecl en ->
let ef = PMap.find i en.e_constrs in
enum_constructor_resolution en ef None null_pos
in
match ctx.m.enum_with_type with
| None ->
raise Not_found
| Some mt ->
loop mt
let rec type_ident_raise ctx i p mode with_type =
let resolve res =
ImportHandling.mark_import_position ctx res.r_pos;
match res.r_kind with
| RTypeImport(_,mt) ->
AKExpr (type_module_type ctx mt p)
| RClassFieldImport(_,c,cf) ->
let e = type_module_type ctx (TClassDecl c) p in
field_access ctx mode cf (FHStatic c) e p
| RAbstractFieldImport(_,a,c,cf) ->
let et = type_module_type ctx (TClassDecl c) p in
let inline = match cf.cf_kind with
| Var {v_read = AccInline} -> true
| _ -> false
in
let fa = FieldAccess.create et cf (FHAbstract(a,extract_param_types a.a_params,c)) inline p in
AKField fa
| REnumConstructorImport(_,en,ef) ->
enum_field_access ctx en ef mode p res.r_pos
| RWildcardPackage _ | RLazy _ | RClassStatics _ | REnumStatics _ ->
assert false
in
match i with
| "true" ->
let acc = AKExpr (mk (TConst (TBool true)) ctx.t.tbool p) in
if mode = MGet then
acc
else
AKNo(acc,p)
| "false" ->
let acc = AKExpr (mk (TConst (TBool false)) ctx.t.tbool p) in
if mode = MGet then
acc
else
AKNo(acc,p)
| "this" ->
let acc = AKExpr(get_this ctx p) in
begin match mode with
| MSet _ ->
add_class_field_flag ctx.f.curfield CfModifiesThis;
begin match ctx.c.curclass.cl_kind with
| KAbstractImpl _ ->
if not (assign_to_this_is_allowed ctx) then
raise_typing_error "Abstract 'this' value can only be modified inside an inline function" p;
acc
| _ ->
AKNo(acc,p)
end
| MCall _ ->
begin match ctx.c.curclass.cl_kind with
| KAbstractImpl _ ->
acc
| _ ->
AKNo(acc,p)
end
| MGet ->
acc
end;
| "abstract" ->
begin match mode, ctx.c.curclass.cl_kind with
| MSet _, KAbstractImpl ab -> raise_typing_error "Property 'abstract' is read-only" p;
| (MGet, KAbstractImpl ab)
| (MCall _, KAbstractImpl ab) ->
let tl = extract_param_types ab.a_params in
let e = get_this ctx p in
let e = {e with etype = TAbstract (ab,tl)} in
AKExpr e
| _ ->
raise_typing_error "Property 'abstract' is reserved and only available in abstracts" p
end
| "super" ->
let t = (match ctx.c.curclass.cl_super with
| None -> raise_typing_error "Current class does not have a superclass" p
| Some (c,params) -> TInst(c,params)
) in
(match ctx.e.curfun with
| FunMember | FunConstructor -> ()
| FunMemberAbstract -> raise_typing_error "Cannot access super inside an abstract function" p
| FunStatic -> raise_typing_error "Cannot access super inside a static function" p;
| FunMemberClassLocal | FunMemberAbstractLocal -> raise_typing_error "Cannot access super inside a local function" p);
AKExpr (mk (TConst TSuper) t p)
| "null" ->
let acc =
let tnull () = ctx.t.tnull (spawn_monomorph ctx.e p) in
let t = match with_type with
| WithType.WithType(t,_) ->
begin match follow t with
| TMono r when not (is_nullable t) ->
(* If our expected type is a monomorph, bind it to Null<?>. The is_nullable check is here because
the expected type could already be Null<?>, in which case we don't want to double-wrap (issue #11286). *)
Monomorph.do_bind r (tnull())
| _ ->
(* Otherwise there's no need to create a monomorph, we can just type the null literal
the way we expect it. *)
()
end;
t
| _ ->
tnull()
in
AKExpr (null t p)
in
if mode = MGet then acc else AKNo(acc,p)
| _ ->
try
let v = PMap.find i ctx.f.locals in
add_var_flag v VUsedByTyper;
(match v.v_extra with
| Some ve ->
let (params,e) = (ve.v_params,ve.v_expr) in
let t = apply_params params (Monomorph.spawn_constrained_monos (fun t -> t) params) v.v_type in
(match e with
| Some ({ eexpr = TFunction f } as e) when ctx.com.display.dms_inline ->
begin match mode with
| MSet _ -> raise_typing_error "Cannot set inline closure" p
| MGet -> raise_typing_error "Cannot create closure on inline closure" p
| MCall _ ->
(* create a fake class with a fake field to emulate inlining *)
let c = mk_class ctx.m.curmod (["local"],v.v_name) e.epos null_pos in
let cf = { (mk_field v.v_name v.v_type e.epos null_pos) with cf_params = params; cf_expr = Some e; cf_kind = Method MethInline } in
add_class_flag c CExtern;
c.cl_fields <- PMap.add cf.cf_name cf PMap.empty;
let e = mk (TConst TNull) (TInst (c,[])) p in
AKField (FieldAccess.create e cf (FHInstance(c,[])) true p)
end
| _ ->
AKExpr (mk (TLocal v) t p))
| _ ->
AKExpr (mk (TLocal v) v.v_type p))
with Not_found -> try
(* member variable lookup *)
if ctx.e.curfun = FunStatic then raise Not_found;
let c , t , f = class_field ctx ctx.c.curclass (extract_param_types ctx.c.curclass.cl_params) i p in
field_access ctx mode f (match c with None -> FHAnon | Some (c,tl) -> FHInstance (c,tl)) (get_this ctx p) p
with Not_found -> try
(* static variable lookup *)
let f = PMap.find i ctx.c.curclass.cl_statics in
let is_impl = has_class_field_flag f CfImpl in
let is_enum = has_class_field_flag f CfEnum in
if is_impl && not (has_class_field_flag ctx.f.curfield CfImpl) && not is_enum then
raise_typing_error (Printf.sprintf "Cannot access non-static field %s from static method" f.cf_name) p;
let e,fa = match ctx.c.curclass.cl_kind with
| KAbstractImpl a when is_impl && not is_enum ->
let tl = extract_param_types a.a_params in
let e = get_this ctx p in
let e = {e with etype = TAbstract(a,tl)} in
e,FHAbstract(a,tl,ctx.c.curclass)
| _ ->
let e = type_module_type ctx (TClassDecl ctx.c.curclass) p in
e,FHStatic ctx.c.curclass
in
field_access ctx mode f fa e p
with Not_found -> try
resolve (resolve_against_expected_enum ctx i)
with Not_found -> try
let own_resolution = get_own_resolution ctx in
resolve (own_resolution#resolve i)
with Not_found ->
resolve (ctx.m.import_resolution#resolve i)
and type_ident ctx i p mode with_type =
try
type_ident_raise ctx i p mode with_type
with Not_found -> try
(* lookup type *)
if is_lower_ident i p then raise Not_found;
let e = try
type_module_type ctx (Typeload.load_type_def' ctx [] i i p) p
with Error { err_message = Module_not_found ([],name) } when name = i ->
raise Not_found
in
AKExpr e
with Not_found ->
let resolved_to_type_parameter = ref false in
try
let t = List.find (fun tp -> tp.ttp_name = i) ctx.type_params in
resolved_to_type_parameter := true;
let c = match follow (extract_param_type t) with TInst(c,_) -> c | _ -> die "" __LOC__ in
if TypeloadCheck.is_generic_parameter ctx c && Meta.has Meta.Const c.cl_meta then begin
let e = type_module_type ctx (TClassDecl c) p in
AKExpr {e with etype = (extract_param_type t)}
end else
raise Not_found
with Not_found ->
if ctx.f.untyped then begin
if i = "__this__" then
AKExpr (mk (TConst TThis) ctx.c.tthis p)
else
let t = mk_mono() in
AKExpr ((mk (TIdent i)) t p)
end else begin
if ctx.e.curfun = FunStatic && PMap.mem i ctx.c.curclass.cl_fields then raise_typing_error ("Cannot access " ^ i ^ " in static function") p;
if !resolved_to_type_parameter then begin
display_error ctx.com ("Only @:const type parameters on @:generic classes can be used as value") p;
AKExpr (mk (TConst TNull) t_dynamic p)
end else begin
let err = Unknown_ident i in
if ctx.f.in_display then begin
raise_error_msg err p
end;
if Diagnostics.error_in_diagnostics_run ctx.com p then begin
DisplayToplevel.handle_unresolved_identifier ctx i p false;
DisplayFields.handle_missing_ident ctx i mode with_type p;
let t = mk_mono() in
AKExpr (mk (TIdent i) t p)
end else match ctx.com.display.dms_kind with
| DMNone ->
raise_error_msg err p
| _ ->
display_error ctx.com (error_msg err) p;
let t = mk_mono() in
(* Add a fake local for #8751. *)
if !ServerConfig.legacy_completion then
ignore(add_local ctx VGenerated i t p);
AKExpr (mk (TIdent i) t p)
end
end
and handle_efield ctx e p0 mode with_type =
let open TyperDotPath in
let dot_path first pnext =
let {name = name; pos = p} = first in
try
(* first, try to resolve the first ident in the chain and access its fields.
this doesn't support untyped identifiers yet, because we want to check fully-qualified
paths first (even in an untyped block) *)
field_chain ctx pnext (type_ident_raise ctx name p MGet WithType.value)
with Not_found ->
(* first ident couldn't be resolved, it's probably a fully qualified path - resolve it *)
let path = (first :: pnext) in
try
resolve_dot_path ctx path mode with_type
with Not_found ->
(* dot-path resolution failed, it could be an untyped field access that happens to look like a dot-path, e.g. `untyped __global__.String` *)
try
(* TODO: we don't really want to do full type_ident again, just the second part of it *)
field_chain ctx pnext (type_ident ctx name p MGet WithType.value)
with Error ({ err_message = Unknown_ident _; err_pos = p2 } as e) when p = p2 ->
try
(* try raising a more sensible error if there was an uppercase-first (module name) part *)
begin
(* TODO: we should pass the actual resolution error from resolve_dot_path instead of Not_found *)
let rec loop pack_acc first_uppercase path =
match path with
| {name = name; case = PLowercase} :: rest ->
(match first_uppercase with
| None -> loop (name :: pack_acc) None rest
| Some (n,p) -> List.rev pack_acc, n, None, p)
| {name = name; case = PUppercase; pos = p} :: rest ->
(match first_uppercase with
| None -> loop pack_acc (Some (name,p)) rest
| Some (n,_) -> List.rev pack_acc, n, Some name, p)
| [] ->
(match first_uppercase with
| None -> raise Not_found
| Some (n,p) -> List.rev pack_acc, n, None, p)
in
let pack,name,sub,p = loop [] None path in
let mpath = (pack,name) in
if ctx.com.module_lut#mem mpath then
let tname = Option.default name sub in
raise_error_msg (Type_not_found (mpath,tname,Not_defined)) p
else
raise_error_msg (Module_not_found mpath) p
end
with Not_found ->
(* if there was no module name part, last guess is that we're trying to get package completion *)
if ctx.f.in_display then begin
let sl = List.map (fun part -> part.name) path in
if is_legacy_completion ctx.com then
raise (Parser.TypePath (sl,None,false,p))
else
DisplayToplevel.collect_and_raise ctx TKType WithType.no_value (CRToplevel None) (String.concat "." sl,p0) p0
end;
raise_error e
in
(* loop through the given EField expression to figure out whether it's a dot-path that we have to resolve,
or a field access chain *)
let rec loop dot_path_acc (e,p) =
match e with
| EField (e,s,EFNormal) ->
(* field access - accumulate and check further *)
loop ((mk_dot_path_part s p) :: dot_path_acc) e
| EConst (Ident i) ->
(* it's a dot-path, so it might be either fully-qualified access (pack.Class.field)
or normal field access of a local/global/field identifier, proceed figuring this out *)
dot_path (mk_dot_path_part i p) dot_path_acc mode with_type
| EField ((eobj,pobj),s,EFSafe) ->
(* safe navigation field access - definitely NOT a fully-qualified access,
create safe navigation chain from the object expression *)
let acc_obj = type_access ctx eobj pobj MGet WithType.value in
let eobj = acc_get ctx acc_obj in
let eobj, tempvar = match (Texpr.skip eobj).eexpr with
| TLocal _ | TTypeExpr _ | TConst _ ->
eobj, None
| _ ->
let v = alloc_var VGenerated "tmp" eobj.etype eobj.epos in
let temp_var = mk (TVar(v, Some eobj)) ctx.t.tvoid v.v_pos in
let eobj = mk (TLocal v) v.v_type v.v_pos in
eobj, Some temp_var
in
let access = field_chain ctx ((mk_dot_path_part s p) :: dot_path_acc) (AKExpr eobj) mode with_type in
AKSafeNav {
sn_pos = p;
sn_base = eobj;
sn_temp_var = tempvar;
sn_access = access;
}
| _ ->
(* non-ident expr occured: definitely NOT a fully-qualified access,
resolve the field chain against this expression *)
(match (type_access ctx e p MGet WithType.value) with
| AKSafeNav sn ->
(* further field access continues the safe navigation chain (after a non-field access inside the chain) *)
AKSafeNav { sn with sn_access = field_chain ctx dot_path_acc sn.sn_access mode with_type }
| e ->
field_chain ctx dot_path_acc e mode with_type)
in
loop [] (e,p0)
and type_access ctx e p mode with_type =
match e with
| EConst (Ident s) ->
type_ident ctx s p mode with_type
| EField (e1,"new",efk_todo) ->
let e1 = type_expr ctx e1 WithType.value in
begin match e1.eexpr with
| TTypeExpr (TClassDecl c) ->
begin match mode with
| MSet _ -> raise_typing_error "Cannot set constructor" p;
| MCall _ -> raise_typing_error ("Cannot call constructor like this, use 'new " ^ (s_type_path c.cl_path) ^ "()' instead") p;
| MGet -> ()
end;
let monos = Monomorph.spawn_constrained_monos (fun t -> t) (match c.cl_kind with KAbstractImpl a -> a.a_params | _ -> c.cl_params) in
let fa = FieldAccess.get_constructor_access c monos p in
let cf = fa.fa_field in
no_abstract_constructor c p;
check_constructor_access ctx c cf p;
let args = match follow (FieldAccess.get_map_function fa cf.cf_type) with TFun(args,ret) -> args | _ -> die "" __LOC__ in
let vl = List.map (fun (n,_,t) -> alloc_var VGenerated n t c.cl_pos) args in
let vexpr v = mk (TLocal v) v.v_type p in
let el = List.map vexpr vl in
let ec,t = match c.cl_kind, fa.fa_host with
| KAbstractImpl a, FHAbstract _ ->
let t = TAbstract(a,monos) in
(new call_dispatcher ctx (MCall []) WithType.value p)#field_call fa el [],t
| KAbstractImpl a, FHInstance (c,pl) ->
let e_new = mk (TNew(c,monos,el)) (TInst(c,pl)) p in
let t = TAbstract(a,monos) in
mk_cast e_new t p, t
| _ ->
let t = TInst(c,monos) in
mk (TNew(c,monos,el)) t p,t
in
AKExpr(mk (TFunction {
tf_args = List.map (fun v -> v,None) vl;
tf_type = t;
tf_expr = mk (TReturn (Some ec)) t p;
}) (TFun ((List.map (fun v -> v.v_name,false,v.v_type) vl),t)) p)
| _ -> raise_typing_error "Binding new is only allowed on class types" p
end;
| EField _ ->
handle_efield ctx e p mode with_type
| EArray (e1,e2) ->
type_array_access ctx e1 e2 p mode
| ECall (e, el) ->
type_call_access ctx e el mode with_type None p
| EDisplay (e,dk) ->
AKExpr (TyperDisplay.handle_edisplay ctx e dk mode with_type)
| _ ->
AKExpr (type_expr ~mode ctx (e,p) with_type)
and type_array_access ctx e1 e2 p mode =
let e1, p1 = e1 in
let a1 = type_access ctx e1 p1 MGet WithType.value in
let e2 = type_expr ctx e2 WithType.value in
match a1 with
| AKSafeNav sn ->
(* pack the array access inside the safe navigation chain *)
let e1 = acc_get ctx sn.sn_access in
AKSafeNav { sn with sn_access = Calls.array_access ctx e1 e2 mode p }
| _ ->
let e1 = acc_get ctx a1 in
Calls.array_access ctx e1 e2 mode p
and type_vars ctx vl p =
let vl = List.map (fun ev ->
let n = fst ev.ev_name
and pv = snd ev.ev_name in
DeprecationCheck.check_is ctx.com ctx.m.curmod ctx.c.curclass.cl_meta ctx.f.curfield.cf_meta n ev.ev_meta pv;
try
let t = Typeload.load_type_hint ctx p LoadNormal ev.ev_type in
let e = (match ev.ev_expr with
| None -> None
| Some e ->
let old_in_loop = ctx.e.in_loop in
if ev.ev_static then ctx.e.in_loop <- false;
let e = Std.finally (fun () -> ctx.e.in_loop <- old_in_loop) (type_expr ctx e) (WithType.with_type t) in
let e = AbstractCast.cast_or_unify ctx t e p in
Some e
) in
let v = if Meta.has Meta.This ev.ev_meta then
add_local ctx VAbstractThis n t pv
else
add_local_with_origin ctx TVOLocalVariable n t pv
in
v.v_meta <- ev.ev_meta;
DisplayEmitter.check_display_metadata ctx v.v_meta;
if ev.ev_final then add_var_flag v VFinal;
if ev.ev_static then add_var_flag v VStatic;
if ctx.f.in_display && DisplayPosition.display_position#enclosed_in pv then
DisplayEmitter.display_variable ctx v pv;
v,e
with
Error err ->
check_error ctx err;
add_local ctx VGenerated n t_dynamic pv, None (* TODO: What to do with this... *)
) vl in
List.iter (fun (v,_) ->
delay_if_mono ctx.g PTypeField v.v_type (fun() ->
if ExtType.is_void (follow v.v_type) then
raise_typing_error "Variables of type Void are not allowed" v.v_pos
)
) vl;
match vl with
| [v,eo] ->
mk (TVar (v,eo)) ctx.t.tvoid p
| _ ->
let e = mk (TBlock (List.map (fun (v,e) -> (mk (TVar (v,e)) ctx.t.tvoid p)) vl)) ctx.t.tvoid p in
mk (TMeta((Meta.MergeBlock,[],p), e)) e.etype e.epos
and format_string ctx s p =
FormatString.format_string ctx.com.defines s p (fun enext p ->
if ctx.f.in_display && DisplayPosition.display_position#enclosed_in p then
Display.preprocess_expr ctx.com (enext,p)
else
enext,p
)
and type_block ctx el with_type p =
let merge acc e = match e.eexpr with
| TMeta((Meta.MergeBlock,_,_), {eexpr = TBlock el}) ->
List.rev el @ acc
| _ ->
e :: acc
in
let rec loop acc = function
| [] -> List.rev acc
| e :: l ->
let acc = try merge acc (type_expr ctx e (if l = [] then with_type else WithType.no_value)) with Error err -> check_error ctx err; acc in
loop acc l
in
let l = loop [] el in
let rec loop = function
| [] -> ctx.t.tvoid
| [e] -> e.etype
| _ :: l -> loop l
in
mk (TBlock l) (loop l) p
and type_object_decl ctx fl with_type p =
let dynamic_parameter = ref None in
let a = (match with_type with
| WithType.WithType(t,_) ->
let rec loop had_cast seen t =
match follow t with
| TAnon a ->
ODKWithStructure a
| TAbstract (a,pl) as t
when not (Meta.has Meta.CoreType a.a_meta)
&& not (List.exists (fun t' -> shallow_eq t t') seen) ->
let froms = get_abstract_froms ctx a pl in
let fold = fun acc (fk,t') -> match loop (fk = FromField) (t :: seen) t' with ODKPlain -> acc | t -> t :: acc in
begin match List.fold_left fold [] froms with
| [] -> ODKPlain (* If the abstract has no casts in the first place, we can assume plain typing (issue #10730) *)
| [t] -> t
| _ -> ODKFailed
end
| TDynamic (Some t) ->
dynamic_parameter := Some t;
ODKWithStructure {
a_status = ref Closed;
a_fields = PMap.empty;
}
| TInst(c,tl) when not had_cast && Meta.has Meta.StructInit c.cl_meta ->
ODKWithClass(c,tl)
| _ ->
ODKPlain
in
loop false [] t
| _ ->
ODKPlain
) in
let type_fields field_map =
let fields = ref PMap.empty in
let extra_fields = ref [] in
let fl = List.map (fun ((n,pn,qs),e) ->
let is_valid = Lexer.is_valid_identifier n in
if PMap.mem n !fields then raise_typing_error ("Duplicate field in object declaration : " ^ n) pn;
let is_final = ref false in
let e = try
let t = match !dynamic_parameter with
| Some t -> t
| None ->
let cf = PMap.find n field_map in
if (has_class_field_flag cf CfFinal) then is_final := true;
if ctx.f.in_display && DisplayPosition.display_position#enclosed_in pn then DisplayEmitter.display_field ctx Unknown CFSMember cf pn;
cf.cf_type
in
let e = type_expr ctx e (WithType.with_structure_field t n) in
let e = AbstractCast.cast_or_unify ctx t e e.epos in
let e = if is_null t && not (is_null e.etype) then mk (TCast(e,None)) (ctx.t.tnull e.etype) e.epos else e in
(try type_eq EqStrict e.etype t; e with Unify_error _ -> mk (TCast (e,None)) t e.epos)
with Not_found ->
if is_valid then
extra_fields := (n,pn) :: !extra_fields;
type_expr ctx e WithType.value
in
if is_valid then begin
if starts_with n '$' then raise_typing_error "Field names starting with a dollar are not allowed" p;
let cf = mk_field n e.etype (punion pn e.epos) pn in
if !is_final then add_class_field_flag cf CfFinal;
fields := PMap.add n cf !fields;
end;
((n,pn,qs),e)
) fl in
let t = mk_anon ~fields:!fields (ref Const) in
if not ctx.f.untyped then begin
(match PMap.foldi (fun n cf acc -> if not (Meta.has Meta.Optional cf.cf_meta) && not (PMap.mem n !fields) then n :: acc else acc) field_map [] with
| [] -> ()
| [n] -> raise_or_display ctx [Unify_custom ("Object requires field " ^ n)] p
| depth -> raise_or_display ctx [Unify_custom ("Object requires fields: " ^ (String.concat ", " depth))] p);
(match !extra_fields with
| [] -> ()
| _ ->
List.iter (fun (n,pn) ->
let err = has_extra_field t n in
raise_or_display ctx [err] pn
) !extra_fields
);
end;
t, fl
in
let type_plain_fields () =
let loop (l,acc) ((f,pf,qs),e) =
let is_valid = Lexer.is_valid_identifier f in
if PMap.mem f acc then raise_typing_error ("Duplicate field in object declaration : " ^ f) pf;
let e = type_expr ctx e (WithType.named_structure_field f) in
(match follow e.etype with TAbstract({a_path=[],"Void"},_) -> raise_typing_error "Fields of type Void are not allowed in structures" e.epos | _ -> ());
let cf = mk_field f e.etype (punion pf e.epos) pf in
if ctx.f.in_display && DisplayPosition.display_position#enclosed_in pf then DisplayEmitter.display_field ctx Unknown CFSMember cf pf;
(((f,pf,qs),e) :: l, if is_valid then begin
if starts_with f '$' then raise_typing_error "Field names starting with a dollar are not allowed" p;
PMap.add f cf acc
end else acc)
in
let fields , types = List.fold_left loop ([],PMap.empty) fl in
let x = ref Const in
ctx.e.opened <- x :: ctx.e.opened;
mk (TObjectDecl (List.rev fields)) (mk_anon ~fields:types x) p
in
(match a with
| ODKPlain | ODKFailed -> type_plain_fields()
| ODKWithStructure a when PMap.is_empty a.a_fields && !dynamic_parameter = None -> type_plain_fields()
| ODKWithStructure a ->
let t, fl = type_fields a.a_fields in
mk (TObjectDecl fl) t p
| ODKWithClass (c,tl) ->
no_abstract_constructor c p;
let fa = FieldAccess.get_constructor_access c tl p in
let ctor = fa.fa_field in
let args = match follow (FieldAccess.get_map_function fa ctor.cf_type) with
| TFun(args,_) ->
begin match ctor.cf_expr with
| Some {eexpr = TFunction tf} ->
let rec loop acc args vl = match args,vl with
| arg :: args,(v,_) :: vl ->
loop ((arg,v.v_pos) :: acc) args vl
| [],_ ->
List.rev acc
| arg :: args,[] ->
loop ((arg,ctor.cf_name_pos) :: acc) args []
in
loop [] args tf.tf_args
| _ ->
List.map (fun args -> (args,ctor.cf_name_pos)) args
end
| _ -> die "" __LOC__
in
let fields = List.fold_left (fun acc ((n,opt,t),parg) ->
let f = mk_field n t parg parg in
if opt then f.cf_meta <- [(Meta.Optional,[],null_pos)];
PMap.add n f acc
) PMap.empty args in
let t,fl = type_fields fields in
let evars,fl,_ = List.fold_left (fun (evars,elocs,had_side_effect) (s,e) ->
begin match e.eexpr with
| TConst _ | TTypeExpr _ | TFunction _ ->
evars,(s,e) :: elocs,had_side_effect
| _ ->
if had_side_effect then begin
let v = gen_local ctx e.etype e.epos in
let ev = mk (TVar(v,Some e)) e.etype e.epos in
let eloc = mk (TLocal v) v.v_type e.epos in
(ev :: evars),((s,eloc) :: elocs),had_side_effect
end else
evars,(s,e) :: elocs,OptimizerTexpr.has_side_effect e
end
) ([],[],false) (List.rev fl) in
let el = List.map (fun ((n,_,t),parg) ->
try Expr.field_assoc n fl
with Not_found ->
try
match ctor.cf_expr with
| Some { eexpr = TFunction fn } ->
Option.get (snd (List.find (fun (v,e) -> n = v.v_name && Option.is_some e) fn.tf_args))
| _ ->
raise Not_found
with Not_found | Option.No_value ->
let t =
if type_has_meta (Abstract.follow_with_abstracts_without_null t) Meta.NotNull then ctx.t.tnull t
else t
in
mk (TConst TNull) t p
) args in
let e = mk (TNew(c,tl,el)) (TInst(c,tl)) p in
mk (TBlock (List.rev (e :: (List.rev evars)))) e.etype e.epos
)
and type_new ctx ptp el with_type force_inline p =
let ptp =
if ptp.pos_full <> null_pos then
ptp
(*
Since macros don't have placed_type_path structure on Haxe side any ENew will have null_pos in `path`.
Try to calculate a better pos.
*)
else begin
let p = match el with
| (_,p1) :: _ when p1.pfile = p.pfile && p.pmin < p1.pmin ->
let pmin = p.pmin + (String.length "new ")
and pmax = p1.pmin - 2 (* Additional "1" for an opening bracket *)
in
{ p with
pmin = if pmin < pmax then pmin else p.pmin;
pmax = pmax;
}
| _ ->
p
in
make_ptp ptp.path p
end
in
let display_position_in_el () =
List.exists (fun e -> DisplayPosition.display_position#enclosed_in (pos e)) el
in
let unify_constructor_call c fa =
try
let fcc = unify_field_call ctx fa [] el p fa.fa_inline in
check_constructor_access ctx c fcc.fc_field p;
fcc
with Error err ->
raise_typing_error_ext err
in
let get_params info tl =
let tl_or_monos params = match tl with
| Some tl ->
tl
| None ->
Monomorph.spawn_constrained_monos (fun t -> t) params
in
let def c =
let tl = tl_or_monos c.cl_params in
let fa = FieldAccess.get_constructor_access c tl p in
ignore (unify_constructor_call c fa);
tl
in
match info.build_kind with
| BuildGeneric c ->
let tl = match with_type with
| WithType.WithType(t,_) ->
(* If we have a matching expected type, use its type parameters. *)
begin match follow t with
| TInst(c,tl) when c.cl_path = info.build_path ->
tl