with Elists; use Elists;
with Exp_Ch11; use Exp_Ch11;
with Exp_Disp; use Exp_Disp;
-with Exp_Tss; use Exp_Tss;
with Exp_Util; use Exp_Util;
with Fname; use Fname;
with Freeze; use Freeze;
with Nlists; use Nlists;
with Output; use Output;
with Opt; use Opt;
+with Restrict; use Restrict;
+with Rident; use Rident;
with Rtsfind; use Rtsfind;
with Sem; use Sem;
with Sem_Aux; use Sem_Aux;
Nod := Type_Definition (Parent (Typ));
elsif Nkind (Parent (Typ)) = N_Private_Type_Declaration then
- if Present (Full_View (Typ)) then
+ if Present (Full_View (Typ))
+ and then Nkind (Parent (Full_View (Typ)))
+ = N_Full_Type_Declaration
+ then
Nod := Type_Definition (Parent (Full_View (Typ)));
-- If the full-view is not available we cannot do anything else
P : constant Node_Id := Prefix (N);
D : Elmt_Id;
Id : Node_Id;
- Indx_Type : Entity_Id;
+ Index_Typ : Entity_Id;
- Deaccessed_T : Entity_Id;
+ Desig_Typ : Entity_Id;
-- This is either a copy of T, or if T is an access type, then it is
-- the directly designated type of this access type.
Old_Lo : Node_Id;
begin
- Indx := First_Index (Deaccessed_T);
+ Indx := First_Index (Desig_Typ);
while Present (Indx) loop
Old_Lo := Type_Low_Bound (Etype (Indx));
Old_Hi := Type_High_Bound (Etype (Indx));
D_Val : Node_Id;
begin
- D := First_Elmt (Discriminant_Constraint (Deaccessed_T));
+ D := First_Elmt (Discriminant_Constraint (Desig_Typ));
while Present (D) loop
if Denotes_Discriminant (Node (D)) then
D_Val := Make_Selected_Component (Loc,
end if;
if Ekind (T) = E_Access_Subtype then
- Deaccessed_T := Designated_Type (T);
+ Desig_Typ := Designated_Type (T);
else
- Deaccessed_T := T;
+ Desig_Typ := T;
end if;
- if Ekind (Deaccessed_T) = E_Array_Subtype then
- Id := First_Index (Deaccessed_T);
+ if Ekind (Desig_Typ) = E_Array_Subtype then
+ Id := First_Index (Desig_Typ);
while Present (Id) loop
- Indx_Type := Underlying_Type (Etype (Id));
+ Index_Typ := Underlying_Type (Etype (Id));
- if Denotes_Discriminant (Type_Low_Bound (Indx_Type))
+ if Denotes_Discriminant (Type_Low_Bound (Index_Typ))
or else
- Denotes_Discriminant (Type_High_Bound (Indx_Type))
+ Denotes_Discriminant (Type_High_Bound (Index_Typ))
then
Remove_Side_Effects (P);
return
Next_Index (Id);
end loop;
- elsif Is_Composite_Type (Deaccessed_T)
- and then Has_Discriminants (Deaccessed_T)
- and then not Has_Unknown_Discriminants (Deaccessed_T)
+ elsif Is_Composite_Type (Desig_Typ)
+ and then Has_Discriminants (Desig_Typ)
+ and then not Has_Unknown_Discriminants (Desig_Typ)
then
- D := First_Elmt (Discriminant_Constraint (Deaccessed_T));
+ if Is_Private_Type (Desig_Typ)
+ and then No (Discriminant_Constraint (Desig_Typ))
+ then
+ Desig_Typ := Full_View (Desig_Typ);
+ end if;
+
+ D := First_Elmt (Discriminant_Constraint (Desig_Typ));
while Present (D) loop
if Denotes_Discriminant (Node (D)) then
Remove_Side_Effects (P);
Name_Buffer (Name_Len + 2) := 'E';
Name_Len := Name_Len + 2;
- -- Create elaboration flag
+ -- Create elaboration counter
- Elab_Ent :=
- Make_Defining_Identifier (Loc, Chars => Name_Find);
+ Elab_Ent := Make_Defining_Identifier (Loc, Chars => Name_Find);
Set_Elaboration_Entity (Spec_Id, Elab_Ent);
Decl :=
- Make_Object_Declaration (Loc,
- Defining_Identifier => Elab_Ent,
- Object_Definition =>
- New_Occurrence_Of (Standard_Boolean, Loc),
- Expression =>
- New_Occurrence_Of (Standard_False, Loc));
+ Make_Object_Declaration (Loc,
+ Defining_Identifier => Elab_Ent,
+ Object_Definition =>
+ New_Occurrence_Of (Standard_Short_Integer, Loc),
+ Expression => Make_Integer_Literal (Loc, Uint_0));
Push_Scope (Standard_Standard);
Add_Global_Declaration (Decl);
end if;
end Cannot_Raise_Constraint_Error;
+ --------------------------------
+ -- Check_Implicit_Dereference --
+ --------------------------------
+
+ procedure Check_Implicit_Dereference (Nam : Node_Id; Typ : Entity_Id)
+ is
+ Disc : Entity_Id;
+ Desig : Entity_Id;
+
+ begin
+ if Ada_Version < Ada_2012
+ or else not Has_Implicit_Dereference (Base_Type (Typ))
+ then
+ return;
+
+ elsif not Comes_From_Source (Nam) then
+ return;
+
+ elsif Is_Entity_Name (Nam)
+ and then Is_Type (Entity (Nam))
+ then
+ null;
+
+ else
+ Disc := First_Discriminant (Typ);
+ while Present (Disc) loop
+ if Has_Implicit_Dereference (Disc) then
+ Desig := Designated_Type (Etype (Disc));
+ Add_One_Interp (Nam, Disc, Desig);
+ exit;
+ end if;
+
+ Next_Discriminant (Disc);
+ end loop;
+ end if;
+ end Check_Implicit_Dereference;
+
+ ---------------------------------------
+ -- Check_Later_Vs_Basic_Declarations --
+ ---------------------------------------
+
+ procedure Check_Later_Vs_Basic_Declarations
+ (Decls : List_Id;
+ During_Parsing : Boolean)
+ is
+ Body_Sloc : Source_Ptr;
+ Decl : Node_Id;
+
+ function Is_Later_Declarative_Item (Decl : Node_Id) return Boolean;
+ -- Return whether Decl is considered as a declarative item.
+ -- When During_Parsing is True, the semantics of Ada 83 is followed.
+ -- When During_Parsing is False, the semantics of SPARK is followed.
+
+ -------------------------------
+ -- Is_Later_Declarative_Item --
+ -------------------------------
+
+ function Is_Later_Declarative_Item (Decl : Node_Id) return Boolean is
+ begin
+ if Nkind (Decl) in N_Later_Decl_Item then
+ return True;
+
+ elsif Nkind (Decl) = N_Pragma then
+ return True;
+
+ elsif During_Parsing then
+ return False;
+
+ -- In SPARK, a package declaration is not considered as a later
+ -- declarative item.
+
+ elsif Nkind (Decl) = N_Package_Declaration then
+ return False;
+
+ -- In SPARK, a renaming is considered as a later declarative item
+
+ elsif Nkind (Decl) in N_Renaming_Declaration then
+ return True;
+
+ else
+ return False;
+ end if;
+ end Is_Later_Declarative_Item;
+
+ -- Start of Check_Later_Vs_Basic_Declarations
+
+ begin
+ Decl := First (Decls);
+
+ -- Loop through sequence of basic declarative items
+
+ Outer : while Present (Decl) loop
+ if Nkind (Decl) /= N_Subprogram_Body
+ and then Nkind (Decl) /= N_Package_Body
+ and then Nkind (Decl) /= N_Task_Body
+ and then Nkind (Decl) not in N_Body_Stub
+ then
+ Next (Decl);
+
+ -- Once a body is encountered, we only allow later declarative
+ -- items. The inner loop checks the rest of the list.
+
+ else
+ Body_Sloc := Sloc (Decl);
+
+ Inner : while Present (Decl) loop
+ if not Is_Later_Declarative_Item (Decl) then
+ if During_Parsing then
+ if Ada_Version = Ada_83 then
+ Error_Msg_Sloc := Body_Sloc;
+ Error_Msg_N
+ ("(Ada 83) decl cannot appear after body#", Decl);
+ end if;
+ else
+ Error_Msg_Sloc := Body_Sloc;
+ Check_SPARK_Restriction
+ ("decl cannot appear after body#", Decl);
+ end if;
+ end if;
+
+ Next (Decl);
+ end loop Inner;
+ end if;
+ end loop Outer;
+ end Check_Later_Vs_Basic_Declarations;
+
-----------------------------------------
-- Check_Dynamically_Tagged_Expression --
-----------------------------------------
return;
end if;
- -- Ada 2012 AI04-0144-2: Dangerous order dependence. Actuals in nested
+ -- Ada 2012 AI05-0144-2: Dangerous order dependence. Actuals in nested
-- calls within a construct have been collected. If one of them is
-- writable and overlaps with another one, evaluation of the enclosing
-- construct is nondeterministic. This is illegal in Ada 2012, but is
-- Associate the primary tag component and the primary dispatch table
-- with all the interfaces that are parents of T
- if Is_Ancestor (Iface, T) then
+ if Is_Ancestor (Iface, T, Use_Full_View => True) then
Append_Elmt (First_Tag_Component (T), Components_List);
Append_Elmt (Node (First_Elmt (Access_Disp_Table (T))), Tags_List);
Comp_Iface := Related_Type (Node (Comp_Elmt));
if Comp_Iface = Iface
- or else Is_Ancestor (Iface, Comp_Iface)
+ or else Is_Ancestor (Iface, Comp_Iface, Use_Full_View => True)
then
Append_Elmt (Node (Comp_Elmt), Components_List);
Append_Elmt (Search_Tag (Comp_Iface), Tags_List);
return Current_Node;
end Enclosing_Lib_Unit_Node;
+ -----------------------
+ -- Enclosing_Package --
+ -----------------------
+
+ function Enclosing_Package (E : Entity_Id) return Entity_Id is
+ Dynamic_Scope : constant Entity_Id := Enclosing_Dynamic_Scope (E);
+
+ begin
+ if Dynamic_Scope = Standard_Standard then
+ return Standard_Standard;
+
+ elsif Dynamic_Scope = Empty then
+ return Empty;
+
+ elsif Ekind_In (Dynamic_Scope, E_Package, E_Package_Body,
+ E_Generic_Package)
+ then
+ return Dynamic_Scope;
+
+ else
+ return Enclosing_Package (Dynamic_Scope);
+ end if;
+ end Enclosing_Package;
+
--------------------------
-- Enclosing_Subprogram --
--------------------------
then
null;
- -- A controller component for a type extension overrides the
- -- inherited component.
-
- elsif Chars (E) = Name_uController then
- null;
-
-- Case of an implicit operation or derived literal. The new entity
-- hides the implicit one, which is removed from all visibility,
-- i.e. the entity list of its scope, and homonym chain of its name.
Append_Entity (Def_Id, S);
Set_Public_Status (Def_Id);
+ -- Declaring a homonym is not allowed in SPARK ...
+
+ if Present (C)
+ and then Restriction_Check_Required (SPARK)
+ then
+
+ declare
+ Enclosing_Subp : constant Node_Id := Enclosing_Subprogram (Def_Id);
+ Enclosing_Pack : constant Node_Id := Enclosing_Package (Def_Id);
+ Other_Scope : constant Node_Id := Enclosing_Dynamic_Scope (C);
+ begin
+
+ -- ... unless the new declaration is in a subprogram, and the
+ -- visible declaration is a variable declaration or a parameter
+ -- specification outside that subprogram.
+
+ if Present (Enclosing_Subp)
+ and then Nkind_In (Parent (C), N_Object_Declaration,
+ N_Parameter_Specification)
+ and then not Scope_Within_Or_Same (Other_Scope, Enclosing_Subp)
+ then
+ null;
+
+ -- ... or the new declaration is in a package, and the visible
+ -- declaration occurs outside that package.
+
+ elsif Present (Enclosing_Pack)
+ and then not Scope_Within_Or_Same (Other_Scope, Enclosing_Pack)
+ then
+ null;
+
+ -- ... or the new declaration is a component declaration in a
+ -- record type definition.
+
+ elsif Nkind (Parent (Def_Id)) = N_Component_Declaration then
+ null;
+
+ -- Don't issue error for non-source entities
+
+ elsif Comes_From_Source (Def_Id)
+ and then Comes_From_Source (C)
+ then
+ Error_Msg_Sloc := Sloc (C);
+ Check_SPARK_Restriction
+ ("redeclaration of identifier &#", Def_Id);
+ end if;
+ end;
+ end if;
+
-- Warn if new entity hides an old one
if Warn_On_Hiding and then Present (C)
then
Call := Parent (Parnt);
- elsif Nkind (Parnt) = N_Procedure_Call_Statement then
+ elsif Nkind_In (Parnt, N_Procedure_Call_Statement, N_Function_Call) then
Call := Parnt;
else
begin
if not Is_Tag (Comp)
and then Chars (Comp) /= Name_uParent
- and then Chars (Comp) /= Name_uController
then
Append_Elmt (Comp, Into);
end if;
end if;
end Get_Actual_Subtype_If_Available;
+ ------------------------
+ -- Get_Body_From_Stub --
+ ------------------------
+
+ function Get_Body_From_Stub (N : Node_Id) return Node_Id is
+ begin
+ return Proper_Body (Unit (Library_Unit (N)));
+ end Get_Body_From_Stub;
+
-------------------------------
-- Get_Default_External_Name --
-------------------------------
Strval => String_From_Name_Buffer);
end Get_Default_External_Name;
+ --------------------------
+ -- Get_Enclosing_Object --
+ --------------------------
+
+ function Get_Enclosing_Object (N : Node_Id) return Entity_Id is
+ begin
+ if Is_Entity_Name (N) then
+ return Entity (N);
+ else
+ case Nkind (N) is
+ when N_Indexed_Component |
+ N_Slice |
+ N_Selected_Component =>
+
+ -- If not generating code, a dereference may be left implicit.
+ -- In thoses cases, return Empty.
+
+ if Is_Access_Type (Etype (Prefix (N))) then
+ return Empty;
+ else
+ return Get_Enclosing_Object (Prefix (N));
+ end if;
+
+ when N_Type_Conversion =>
+ return Get_Enclosing_Object (Expression (N));
+
+ when others =>
+ return Empty;
+ end case;
+ end if;
+ end Get_Enclosing_Object;
+
---------------------------
-- Get_Enum_Lit_From_Pos --
---------------------------
end if;
end Get_Enum_Lit_From_Pos;
+ ---------------------------------------
+ -- Get_Ensures_From_Test_Case_Pragma --
+ ---------------------------------------
+
+ function Get_Ensures_From_Test_Case_Pragma (N : Node_Id) return Node_Id is
+ Args : constant List_Id := Pragma_Argument_Associations (N);
+ Res : Node_Id;
+
+ begin
+ if List_Length (Args) = 4 then
+ Res := Pick (Args, 4);
+
+ else
+ Res := Pick (Args, 3);
+ if Chars (Res) /= Name_Ensures then
+ Res := Empty;
+ end if;
+ end if;
+
+ return Res;
+ end Get_Ensures_From_Test_Case_Pragma;
+
------------------------
-- Get_Generic_Entity --
------------------------
return Entity_Id (Get_Name_Table_Info (Id));
end Get_Name_Entity_Id;
+ ------------------------------------
+ -- Get_Name_From_Test_Case_Pragma --
+ ------------------------------------
+
+ function Get_Name_From_Test_Case_Pragma (N : Node_Id) return String_Id is
+ Arg : constant Node_Id :=
+ Get_Pragma_Arg (First (Pragma_Argument_Associations (N)));
+ begin
+ return Strval (Expr_Value_S (Arg));
+ end Get_Name_From_Test_Case_Pragma;
+
-------------------
-- Get_Pragma_Id --
-------------------
return R;
end Get_Renamed_Entity;
+ ----------------------------------------
+ -- Get_Requires_From_Test_Case_Pragma --
+ ----------------------------------------
+
+ function Get_Requires_From_Test_Case_Pragma (N : Node_Id) return Node_Id is
+ Args : constant List_Id := Pragma_Argument_Associations (N);
+ Res : Node_Id;
+
+ begin
+ Res := Pick (Args, 3);
+ if Chars (Res) /= Name_Requires then
+ Res := Empty;
+ end if;
+
+ return Res;
+ end Get_Requires_From_Test_Case_Pragma;
+
-------------------------
-- Get_Subprogram_Body --
-------------------------
end if;
end Has_Private_Component;
+ -----------------------------
+ -- Has_Static_Array_Bounds --
+ -----------------------------
+
+ function Has_Static_Array_Bounds (Typ : Node_Id) return Boolean is
+ Ndims : constant Nat := Number_Dimensions (Typ);
+
+ Index : Node_Id;
+ Low : Node_Id;
+ High : Node_Id;
+
+ begin
+ -- Unconstrained types do not have static bounds
+
+ if not Is_Constrained (Typ) then
+ return False;
+ end if;
+
+ -- First treat string literals specially, as the lower bound and length
+ -- of string literals are not stored like those of arrays.
+
+ -- A string literal always has static bounds
+
+ if Ekind (Typ) = E_String_Literal_Subtype then
+ return True;
+ end if;
+
+ -- Treat all dimensions in turn
+
+ Index := First_Index (Typ);
+ for Indx in 1 .. Ndims loop
+
+ -- In case of an erroneous index which is not a discrete type, return
+ -- that the type is not static.
+
+ if not Is_Discrete_Type (Etype (Index))
+ or else Etype (Index) = Any_Type
+ then
+ return False;
+ end if;
+
+ Get_Index_Bounds (Index, Low, High);
+
+ if Error_Posted (Low) or else Error_Posted (High) then
+ return False;
+ end if;
+
+ if Is_OK_Static_Expression (Low)
+ and then
+ Is_OK_Static_Expression (High)
+ then
+ null;
+ else
+ return False;
+ end if;
+
+ Next (Index);
+ end loop;
+
+ -- If we fall through the loop, all indexes matched
+
+ return True;
+ end Has_Static_Array_Bounds;
+
----------------
-- Has_Stream --
----------------
Elmt := First_Elmt (Ifaces_List);
while Present (Elmt) loop
- if Is_Ancestor (Node (Elmt), Typ)
+ if Is_Ancestor (Node (Elmt), Typ, Use_Full_View => True)
and then Exclude_Parents
then
null;
and then not In_Private_Part (Scope_Id);
end In_Visible_Part;
+ --------------------------------
+ -- Incomplete_Or_Private_View --
+ --------------------------------
+
+ function Incomplete_Or_Private_View (Typ : Entity_Id) return Entity_Id is
+ function Inspect_Decls
+ (Decls : List_Id;
+ Taft : Boolean := False) return Entity_Id;
+ -- Check whether a declarative region contains the incomplete or private
+ -- view of Typ.
+
+ -------------------
+ -- Inspect_Decls --
+ -------------------
+
+ function Inspect_Decls
+ (Decls : List_Id;
+ Taft : Boolean := False) return Entity_Id
+ is
+ Decl : Node_Id;
+ Match : Node_Id;
+
+ begin
+ Decl := First (Decls);
+ while Present (Decl) loop
+ Match := Empty;
+
+ if Taft then
+ if Nkind (Decl) = N_Incomplete_Type_Declaration then
+ Match := Defining_Identifier (Decl);
+ end if;
+
+ else
+ if Nkind_In (Decl, N_Private_Extension_Declaration,
+ N_Private_Type_Declaration)
+ then
+ Match := Defining_Identifier (Decl);
+ end if;
+ end if;
+
+ if Present (Match)
+ and then Present (Full_View (Match))
+ and then Full_View (Match) = Typ
+ then
+ return Match;
+ end if;
+
+ Next (Decl);
+ end loop;
+
+ return Empty;
+ end Inspect_Decls;
+
+ -- Local variables
+
+ Prev : Entity_Id;
+
+ -- Start of processing for Incomplete_Or_Partial_View
+
+ begin
+ -- Incomplete type case
+
+ Prev := Current_Entity_In_Scope (Typ);
+
+ if Present (Prev)
+ and then Is_Incomplete_Type (Prev)
+ and then Present (Full_View (Prev))
+ and then Full_View (Prev) = Typ
+ then
+ return Prev;
+ end if;
+
+ -- Private or Taft amendment type case
+
+ declare
+ Pkg : constant Entity_Id := Scope (Typ);
+ Pkg_Decl : Node_Id := Pkg;
+
+ begin
+ if Ekind (Pkg) = E_Package then
+ while Nkind (Pkg_Decl) /= N_Package_Specification loop
+ Pkg_Decl := Parent (Pkg_Decl);
+ end loop;
+
+ -- It is knows that Typ has a private view, look for it in the
+ -- visible declarations of the enclosing scope. A special case
+ -- of this is when the two views have been exchanged - the full
+ -- appears earlier than the private.
+
+ if Has_Private_Declaration (Typ) then
+ Prev := Inspect_Decls (Visible_Declarations (Pkg_Decl));
+
+ -- Exchanged view case, look in the private declarations
+
+ if No (Prev) then
+ Prev := Inspect_Decls (Private_Declarations (Pkg_Decl));
+ end if;
+
+ return Prev;
+
+ -- Otherwise if this is the package body, then Typ is a potential
+ -- Taft amendment type. The incomplete view should be located in
+ -- the private declarations of the enclosing scope.
+
+ elsif In_Package_Body (Pkg) then
+ return Inspect_Decls (Private_Declarations (Pkg_Decl), True);
+ end if;
+ end if;
+ end;
+
+ -- The type has no incomplete or private view
+
+ return Empty;
+ end Incomplete_Or_Private_View;
+
---------------------------------
-- Insert_Explicit_Dereference --
---------------------------------
end case;
end Is_Actual_Parameter;
- ---------------------
- -- Is_Aliased_View --
- ---------------------
+ --------------------------------
+ -- Is_Actual_Tagged_Parameter --
+ --------------------------------
- function Is_Aliased_View (Obj : Node_Id) return Boolean is
+ function Is_Actual_Tagged_Parameter (N : Node_Id) return Boolean is
+ Formal : Entity_Id;
+ Call : Node_Id;
+ begin
+ Find_Actual (N, Formal, Call);
+ return Present (Formal) and then Is_Tagged_Type (Etype (Formal));
+ end Is_Actual_Tagged_Parameter;
+
+ ---------------------
+ -- Is_Aliased_View --
+ ---------------------
+
+ function Is_Aliased_View (Obj : Node_Id) return Boolean is
E : Entity_Id;
begin
end if;
end Is_Atomic_Object;
- -------------------------
- -- Is_Coextension_Root --
- -------------------------
-
- function Is_Coextension_Root (N : Node_Id) return Boolean is
- begin
- return
- Nkind (N) = N_Allocator
- and then Present (Coextensions (N))
-
- -- Anonymous access discriminants carry a list of all nested
- -- controlled coextensions.
-
- and then not Is_Dynamic_Coextension (N)
- and then not Is_Static_Coextension (N);
- end Is_Coextension_Root;
-
-----------------------------
-- Is_Concurrent_Interface --
-----------------------------
end if;
end Is_Descendent_Of;
+ ----------------------------
+ -- Is_Expression_Function --
+ ----------------------------
+
+ function Is_Expression_Function (Subp : Entity_Id) return Boolean is
+ Decl : constant Node_Id := Unit_Declaration_Node (Subp);
+
+ begin
+ return Ekind (Subp) = E_Function
+ and then Nkind (Decl) = N_Subprogram_Declaration
+ and then
+ (Nkind (Original_Node (Decl)) = N_Expression_Function
+ or else
+ (Present (Corresponding_Body (Decl))
+ and then
+ Nkind (Original_Node
+ (Unit_Declaration_Node (Corresponding_Body (Decl))))
+ = N_Expression_Function));
+ end Is_Expression_Function;
+
--------------
-- Is_False --
--------------
begin
Ent := First_Entity (Typ);
while Present (Ent) loop
- if Chars (Ent) = Name_uController then
- null;
-
- elsif Ekind (Ent) = E_Component
+ if Ekind (Ent) = E_Component
and then (No (Parent (Ent))
or else No (Expression (Parent (Ent))))
and then not Is_Fully_Initialized_Type (Etype (Ent))
and then Is_Derived_Type (Etype (E)));
end Is_Inherited_Operation;
+ -------------------------------------
+ -- Is_Inherited_Operation_For_Type --
+ -------------------------------------
+
+ function Is_Inherited_Operation_For_Type
+ (E : Entity_Id; Typ : Entity_Id) return Boolean
+ is
+ begin
+ return Is_Inherited_Operation (E)
+ and then Etype (Parent (E)) = Typ;
+ end Is_Inherited_Operation_For_Type;
+
-----------------------------
-- Is_Library_Level_Entity --
-----------------------------
begin
-- Verify that prefix is analyzed and has the proper form. Note that
- -- the attributes Elab_Spec, Elab_Body, and UET_Address, which also
- -- produce the address of an entity, do not analyze their prefix
- -- because they denote entities that are not necessarily visible.
+ -- the attributes Elab_Spec, Elab_Body, Elab_Subp_Body and UET_Address,
+ -- which also produce the address of an entity, do not analyze their
+ -- prefix because they denote entities that are not necessarily visible.
-- Neither of them can apply to a protected type.
return Ada_Version >= Ada_2005
end if;
end Is_Selector_Name;
+ ----------------------------------
+ -- Is_SPARK_Initialization_Expr --
+ ----------------------------------
+
+ function Is_SPARK_Initialization_Expr (N : Node_Id) return Boolean is
+ Is_Ok : Boolean;
+ Expr : Node_Id;
+ Comp_Assn : Node_Id;
+ Orig_N : constant Node_Id := Original_Node (N);
+
+ begin
+ Is_Ok := True;
+
+ if not Comes_From_Source (Orig_N) then
+ goto Done;
+ end if;
+
+ pragma Assert (Nkind (Orig_N) in N_Subexpr);
+
+ case Nkind (Orig_N) is
+ when N_Character_Literal |
+ N_Integer_Literal |
+ N_Real_Literal |
+ N_String_Literal =>
+ null;
+
+ when N_Identifier |
+ N_Expanded_Name =>
+ if Is_Entity_Name (Orig_N)
+ and then Present (Entity (Orig_N)) -- needed in some cases
+ then
+ case Ekind (Entity (Orig_N)) is
+ when E_Constant |
+ E_Enumeration_Literal |
+ E_Named_Integer |
+ E_Named_Real =>
+ null;
+ when others =>
+ if Is_Type (Entity (Orig_N)) then
+ null;
+ else
+ Is_Ok := False;
+ end if;
+ end case;
+ end if;
+
+ when N_Qualified_Expression |
+ N_Type_Conversion =>
+ Is_Ok := Is_SPARK_Initialization_Expr (Expression (Orig_N));
+
+ when N_Unary_Op =>
+ Is_Ok := Is_SPARK_Initialization_Expr (Right_Opnd (Orig_N));
+
+ when N_Binary_Op |
+ N_Short_Circuit |
+ N_Membership_Test =>
+ Is_Ok := Is_SPARK_Initialization_Expr (Left_Opnd (Orig_N))
+ and then Is_SPARK_Initialization_Expr (Right_Opnd (Orig_N));
+
+ when N_Aggregate |
+ N_Extension_Aggregate =>
+ if Nkind (Orig_N) = N_Extension_Aggregate then
+ Is_Ok := Is_SPARK_Initialization_Expr (Ancestor_Part (Orig_N));
+ end if;
+
+ Expr := First (Expressions (Orig_N));
+ while Present (Expr) loop
+ if not Is_SPARK_Initialization_Expr (Expr) then
+ Is_Ok := False;
+ goto Done;
+ end if;
+
+ Next (Expr);
+ end loop;
+
+ Comp_Assn := First (Component_Associations (Orig_N));
+ while Present (Comp_Assn) loop
+ Expr := Expression (Comp_Assn);
+ if Present (Expr) -- needed for box association
+ and then not Is_SPARK_Initialization_Expr (Expr)
+ then
+ Is_Ok := False;
+ goto Done;
+ end if;
+
+ Next (Comp_Assn);
+ end loop;
+
+ when N_Attribute_Reference =>
+ if Nkind (Prefix (Orig_N)) in N_Subexpr then
+ Is_Ok := Is_SPARK_Initialization_Expr (Prefix (Orig_N));
+ end if;
+
+ Expr := First (Expressions (Orig_N));
+ while Present (Expr) loop
+ if not Is_SPARK_Initialization_Expr (Expr) then
+ Is_Ok := False;
+ goto Done;
+ end if;
+
+ Next (Expr);
+ end loop;
+
+ -- Selected components might be expanded named not yet resolved, so
+ -- default on the safe side. (Eg on sparklex.ads)
+
+ when N_Selected_Component =>
+ null;
+
+ when others =>
+ Is_Ok := False;
+ end case;
+
+ <<Done>>
+ return Is_Ok;
+ end Is_SPARK_Initialization_Expr;
+
+ -------------------------------
+ -- Is_SPARK_Object_Reference --
+ -------------------------------
+
+ function Is_SPARK_Object_Reference (N : Node_Id) return Boolean is
+ begin
+ if Is_Entity_Name (N) then
+ return Present (Entity (N))
+ and then
+ (Ekind_In (Entity (N), E_Constant, E_Variable)
+ or else Ekind (Entity (N)) in Formal_Kind);
+
+ else
+ case Nkind (N) is
+ when N_Selected_Component =>
+ return Is_SPARK_Object_Reference (Prefix (N));
+
+ when others =>
+ return False;
+ end case;
+ end if;
+ end Is_SPARK_Object_Reference;
+
------------------
-- Is_Statement --
------------------
or else Nkind (N) = N_Procedure_Call_Statement;
end Is_Statement;
+ --------------------------------------------------
+ -- Is_Subprogram_Stub_Without_Prior_Declaration --
+ --------------------------------------------------
+
+ function Is_Subprogram_Stub_Without_Prior_Declaration
+ (N : Node_Id) return Boolean is
+
+ begin
+ -- A subprogram stub without prior declaration serves as declaration for
+ -- the actual subprogram body. As such, it has an attached defining
+ -- entity of E_[Generic_]Function or E_[Generic_]Procedure.
+
+ return Nkind (N) = N_Subprogram_Body_Stub
+ and then Ekind (Defining_Entity (N)) /= E_Subprogram_Body;
+ end Is_Subprogram_Stub_Without_Prior_Declaration;
+
---------------------------------
-- Is_Synchronized_Tagged_Type --
---------------------------------
and then Is_Synchronized_Interface (E))
or else
(Ekind (E) = E_Record_Type_With_Private
+ and then Nkind (Parent (E)) = N_Private_Extension_Declaration
and then (Synchronized_Present (Parent (E))
or else Is_Synchronized_Interface (Etype (E))));
end Is_Synchronized_Tagged_Type;
-- Is_Variable --
-----------------
- function Is_Variable (N : Node_Id) return Boolean is
-
- Orig_Node : constant Node_Id := Original_Node (N);
- -- We do the test on the original node, since this is basically a test
- -- of syntactic categories, so it must not be disturbed by whatever
- -- rewriting might have occurred. For example, an aggregate, which is
- -- certainly NOT a variable, could be turned into a variable by
- -- expansion.
+ function Is_Variable
+ (N : Node_Id;
+ Use_Original_Node : Boolean := True) return Boolean
+ is
+ Orig_Node : Node_Id;
function In_Protected_Function (E : Entity_Id) return Boolean;
-- Within a protected function, the private components of the enclosing
-- Start of processing for Is_Variable
begin
+ -- Check if we perform the test on the original node since this may be a
+ -- test of syntactic categories which must not be disturbed by whatever
+ -- rewriting might have occurred. For example, an aggregate, which is
+ -- certainly NOT a variable, could be turned into a variable by
+ -- expansion.
+
+ if Use_Original_Node then
+ Orig_Node := Original_Node (N);
+ else
+ Orig_Node := N;
+ end if;
+
-- Definitely OK if Assignment_OK is set. Since this is something that
-- only gets set for expanded nodes, the test is on N, not Orig_Node.
end case;
end Known_To_Be_Assigned;
+ ---------------------------
+ -- Last_Source_Statement --
+ ---------------------------
+
+ function Last_Source_Statement (HSS : Node_Id) return Node_Id is
+ N : Node_Id;
+
+ begin
+ N := Last (Statements (HSS));
+ while Present (N) loop
+ exit when Comes_From_Source (N);
+ Prev (N);
+ end loop;
+
+ return N;
+ end Last_Source_Statement;
+
+ ----------------------------------
+ -- Matching_Static_Array_Bounds --
+ ----------------------------------
+
+ function Matching_Static_Array_Bounds
+ (L_Typ : Node_Id;
+ R_Typ : Node_Id) return Boolean
+ is
+ L_Ndims : constant Nat := Number_Dimensions (L_Typ);
+ R_Ndims : constant Nat := Number_Dimensions (R_Typ);
+
+ L_Index : Node_Id;
+ R_Index : Node_Id;
+ L_Low : Node_Id;
+ L_High : Node_Id;
+ L_Len : Uint;
+ R_Low : Node_Id;
+ R_High : Node_Id;
+ R_Len : Uint;
+
+ begin
+ if L_Ndims /= R_Ndims then
+ return False;
+ end if;
+
+ -- Unconstrained types do not have static bounds
+
+ if not Is_Constrained (L_Typ) or else not Is_Constrained (R_Typ) then
+ return False;
+ end if;
+
+ -- First treat specially the first dimension, as the lower bound and
+ -- length of string literals are not stored like those of arrays.
+
+ if Ekind (L_Typ) = E_String_Literal_Subtype then
+ L_Low := String_Literal_Low_Bound (L_Typ);
+ L_Len := String_Literal_Length (L_Typ);
+ else
+ L_Index := First_Index (L_Typ);
+ Get_Index_Bounds (L_Index, L_Low, L_High);
+
+ if Is_OK_Static_Expression (L_Low)
+ and then Is_OK_Static_Expression (L_High)
+ then
+ if Expr_Value (L_High) < Expr_Value (L_Low) then
+ L_Len := Uint_0;
+ else
+ L_Len := (Expr_Value (L_High) - Expr_Value (L_Low)) + 1;
+ end if;
+ else
+ return False;
+ end if;
+ end if;
+
+ if Ekind (R_Typ) = E_String_Literal_Subtype then
+ R_Low := String_Literal_Low_Bound (R_Typ);
+ R_Len := String_Literal_Length (R_Typ);
+ else
+ R_Index := First_Index (R_Typ);
+ Get_Index_Bounds (R_Index, R_Low, R_High);
+
+ if Is_OK_Static_Expression (R_Low)
+ and then Is_OK_Static_Expression (R_High)
+ then
+ if Expr_Value (R_High) < Expr_Value (R_Low) then
+ R_Len := Uint_0;
+ else
+ R_Len := (Expr_Value (R_High) - Expr_Value (R_Low)) + 1;
+ end if;
+ else
+ return False;
+ end if;
+ end if;
+
+ if Is_OK_Static_Expression (L_Low)
+ and then Is_OK_Static_Expression (R_Low)
+ and then Expr_Value (L_Low) = Expr_Value (R_Low)
+ and then L_Len = R_Len
+ then
+ null;
+ else
+ return False;
+ end if;
+
+ -- Then treat all other dimensions
+
+ for Indx in 2 .. L_Ndims loop
+ Next (L_Index);
+ Next (R_Index);
+
+ Get_Index_Bounds (L_Index, L_Low, L_High);
+ Get_Index_Bounds (R_Index, R_Low, R_High);
+
+ if Is_OK_Static_Expression (L_Low)
+ and then Is_OK_Static_Expression (L_High)
+ and then Is_OK_Static_Expression (R_Low)
+ and then Is_OK_Static_Expression (R_High)
+ and then Expr_Value (L_Low) = Expr_Value (R_Low)
+ and then Expr_Value (L_High) = Expr_Value (R_High)
+ then
+ null;
+ else
+ return False;
+ end if;
+ end loop;
+
+ -- If we fall through the loop, all indexes matched
+
+ return True;
+ end Matching_Static_Array_Bounds;
+
-------------------
-- May_Be_Lvalue --
-------------------
elsif Is_Record_Type (Btype) then
Component := First_Entity (Btype);
- while Present (Component) loop
-
+ while Present (Component)
+ and then Comes_From_Source (Component)
+ loop
-- Skip anonymous types generated by constrained components
if not Is_Type (Component) then
procedure Process_End_Label
(N : Node_Id;
Typ : Character;
- Ent : Entity_Id)
+ Ent : Entity_Id)
is
Loc : Source_Ptr;
Nam : Node_Id;
Get_Decoded_Name_String (Chars (Endl));
Set_Sloc (Endl, Sloc (Endl) + Source_Ptr (Name_Len));
+
+ else
+ -- In SPARK mode, no missing label is allowed for packages and
+ -- subprogram bodies. Detect those cases by testing whether
+ -- Process_End_Label was called for a body (Typ = 't') or a package.
+
+ if Restriction_Check_Required (SPARK)
+ and then (Typ = 't' or else Ekind (Ent) = E_Package)
+ then
+ Error_Msg_Node_1 := Endl;
+ Check_SPARK_Restriction ("`END &` required", Endl, Force => True);
+ end if;
end if;
-- Now generate the e/t reference
-- Set_Current_Entity --
------------------------
- -- The given entity is to be set as the currently visible definition
- -- of its associated name (i.e. the Node_Id associated with its name).
- -- All we have to do is to get the name from the identifier, and
- -- then set the associated Node_Id to point to the given entity.
+ -- The given entity is to be set as the currently visible definition of its
+ -- associated name (i.e. the Node_Id associated with its name). All we have
+ -- to do is to get the name from the identifier, and then set the
+ -- associated Node_Id to point to the given entity.
procedure Set_Current_Entity (E : Entity_Id) is
begin
return Scope_Depth (Enclosing_Dynamic_Scope (Btyp));
end Type_Access_Level;
+ ------------------------------------
+ -- Type_Without_Stream_Operation --
+ ------------------------------------
+
+ function Type_Without_Stream_Operation
+ (T : Entity_Id;
+ Op : TSS_Name_Type := TSS_Null) return Entity_Id
+ is
+ BT : constant Entity_Id := Base_Type (T);
+ Op_Missing : Boolean;
+
+ begin
+ if not Restriction_Active (No_Default_Stream_Attributes) then
+ return Empty;
+ end if;
+
+ if Is_Elementary_Type (T) then
+ if Op = TSS_Null then
+ Op_Missing :=
+ No (TSS (BT, TSS_Stream_Read))
+ or else No (TSS (BT, TSS_Stream_Write));
+
+ else
+ Op_Missing := No (TSS (BT, Op));
+ end if;
+
+ if Op_Missing then
+ return T;
+ else
+ return Empty;
+ end if;
+
+ elsif Is_Array_Type (T) then
+ return Type_Without_Stream_Operation (Component_Type (T), Op);
+
+ elsif Is_Record_Type (T) then
+ declare
+ Comp : Entity_Id;
+ C_Typ : Entity_Id;
+
+ begin
+ Comp := First_Component (T);
+ while Present (Comp) loop
+ C_Typ := Type_Without_Stream_Operation (Etype (Comp), Op);
+
+ if Present (C_Typ) then
+ return C_Typ;
+ end if;
+
+ Next_Component (Comp);
+ end loop;
+
+ return Empty;
+ end;
+
+ elsif Is_Private_Type (T)
+ and then Present (Full_View (T))
+ then
+ return Type_Without_Stream_Operation (Full_View (T), Op);
+ else
+ return Empty;
+ end if;
+ end Type_Without_Stream_Operation;
+
+ ----------------------------
+ -- Unique_Defining_Entity --
+ ----------------------------
+
+ function Unique_Defining_Entity (N : Node_Id) return Entity_Id is
+ begin
+ case Nkind (N) is
+ when N_Package_Body =>
+ return Corresponding_Spec (N);
+
+ when N_Subprogram_Body =>
+ if Acts_As_Spec (N) then
+ return Defining_Entity (N);
+ else
+ return Corresponding_Spec (N);
+ end if;
+
+ when others =>
+ return Defining_Entity (N);
+ end case;
+ end Unique_Defining_Entity;
+
+ -----------------
+ -- Unique_Name --
+ -----------------
+
+ function Unique_Name (E : Entity_Id) return String is
+
+ function Get_Scoped_Name (E : Entity_Id) return String;
+ -- Return the name of E prefixed by all the names of the scopes to which
+ -- E belongs, except for Standard.
+
+ ---------------------
+ -- Get_Scoped_Name --
+ ---------------------
+
+ function Get_Scoped_Name (E : Entity_Id) return String is
+ Name : constant String := Get_Name_String (Chars (E));
+ begin
+ if Has_Fully_Qualified_Name (E)
+ or else Scope (E) = Standard_Standard
+ then
+ return Name;
+ else
+ return Get_Scoped_Name (Scope (E)) & "__" & Name;
+ end if;
+ end Get_Scoped_Name;
+
+ -- Start of processing for Unique_Name
+
+ begin
+ if E = Standard_Standard then
+ return Get_Name_String (Name_Standard);
+
+ elsif Scope (E) = Standard_Standard
+ and then not (Ekind (E) = E_Package or else Is_Subprogram (E))
+ then
+ return Get_Name_String (Name_Standard) & "__" &
+ Get_Name_String (Chars (E));
+
+ else
+ return Get_Scoped_Name (E);
+ end if;
+ end Unique_Name;
+
--------------------------
-- Unit_Declaration_Node --
--------------------------
return N;
end Unit_Declaration_Node;
+ ---------------------
+ -- Unit_Is_Visible --
+ ---------------------
+
+ function Unit_Is_Visible (U : Entity_Id) return Boolean is
+ Curr : constant Node_Id := Cunit (Current_Sem_Unit);
+ Curr_Entity : constant Entity_Id := Cunit_Entity (Current_Sem_Unit);
+
+ function Unit_In_Parent_Context (Par_Unit : Node_Id) return Boolean;
+ -- For a child unit, check whether unit appears in a with_clause
+ -- of a parent.
+
+ function Unit_In_Context (Comp_Unit : Node_Id) return Boolean;
+ -- Scan the context clause of one compilation unit looking for a
+ -- with_clause for the unit in question.
+
+ ----------------------------
+ -- Unit_In_Parent_Context --
+ ----------------------------
+
+ function Unit_In_Parent_Context (Par_Unit : Node_Id) return Boolean is
+ begin
+ if Unit_In_Context (Par_Unit) then
+ return True;
+
+ elsif Is_Child_Unit (Defining_Entity (Unit (Par_Unit))) then
+ return Unit_In_Parent_Context (Parent_Spec (Unit (Par_Unit)));
+
+ else
+ return False;
+ end if;
+ end Unit_In_Parent_Context;
+
+ ---------------------
+ -- Unit_In_Context --
+ ---------------------
+
+ function Unit_In_Context (Comp_Unit : Node_Id) return Boolean is
+ Clause : Node_Id;
+
+ begin
+ Clause := First (Context_Items (Comp_Unit));
+ while Present (Clause) loop
+ if Nkind (Clause) = N_With_Clause then
+ if Library_Unit (Clause) = U then
+ return True;
+
+ -- The with_clause may denote a renaming of the unit we are
+ -- looking for, eg. Text_IO which renames Ada.Text_IO.
+
+ elsif
+ Renamed_Entity (Entity (Name (Clause))) =
+ Defining_Entity (Unit (U))
+ then
+ return True;
+ end if;
+ end if;
+
+ Next (Clause);
+ end loop;
+
+ return False;
+ end Unit_In_Context;
+
+ -- Start of processing for Unit_Is_Visible
+
+ begin
+ -- The currrent unit is directly visible
+
+ if Curr = U then
+ return True;
+
+ elsif Unit_In_Context (Curr) then
+ return True;
+
+ -- If the current unit is a body, check the context of the spec
+
+ elsif Nkind (Unit (Curr)) = N_Package_Body
+ or else
+ (Nkind (Unit (Curr)) = N_Subprogram_Body
+ and then not Acts_As_Spec (Unit (Curr)))
+ then
+ if Unit_In_Context (Library_Unit (Curr)) then
+ return True;
+ end if;
+ end if;
+
+ -- If the spec is a child unit, examine the parents
+
+ if Is_Child_Unit (Curr_Entity) then
+ if Nkind (Unit (Curr)) in N_Unit_Body then
+ return
+ Unit_In_Parent_Context
+ (Parent_Spec (Unit (Library_Unit (Curr))));
+ else
+ return Unit_In_Parent_Context (Parent_Spec (Unit (Curr)));
+ end if;
+
+ else
+ return False;
+ end if;
+ end Unit_Is_Visible;
+
------------------------------
-- Universal_Interpretation --
------------------------------
Found_Type : constant Entity_Id := First_Subtype (Etype (Expr));
Expec_Type : constant Entity_Id := First_Subtype (Expected_Type);
+ Matching_Field : Entity_Id;
+ -- Entity to give a more precise suggestion on how to write a one-
+ -- element positional aggregate.
+
function Has_One_Matching_Field return Boolean;
-- Determines if Expec_Type is a record type with a single component or
-- discriminant whose type matches the found type or is one dimensional
E : Entity_Id;
begin
+ Matching_Field := Empty;
+
if Is_Array_Type (Expec_Type)
and then Number_Dimensions (Expec_Type) = 1
and then
Covers (Etype (Component_Type (Expec_Type)), Found_Type)
then
+ -- Use type name if available. This excludes multidimensional
+ -- arrays and anonymous arrays.
+
+ if Comes_From_Source (Expec_Type) then
+ Matching_Field := Expec_Type;
+
+ -- For an assignment, use name of target
+
+ elsif Nkind (Parent (Expr)) = N_Assignment_Statement
+ and then Is_Entity_Name (Name (Parent (Expr)))
+ then
+ Matching_Field := Entity (Name (Parent (Expr)));
+ end if;
+
return True;
elsif not Is_Record_Type (Expec_Type) then
return False;
else
+ Matching_Field := E;
return True;
end if;
end if;
and then Has_One_Matching_Field
then
Error_Msg_N ("positional aggregate cannot have one component", Expr);
+ if Present (Matching_Field) then
+ if Is_Array_Type (Expec_Type) then
+ Error_Msg_NE
+ ("\write instead `&''First ='> ...`", Expr, Matching_Field);
+
+ else
+ Error_Msg_NE
+ ("\write instead `& ='> ...`", Expr, Matching_Field);
+ end if;
+ end if;
-- Another special check, if we are looking for a pool-specific access
-- type and we found an E_Access_Attribute_Type, then we have the case
projects / platform / upstream / gcc.git / blobdiff