with Atree; use Atree;
with Casing; use Casing;
with Checks; use Checks;
with Debug; use Debug;
with Errout; use Errout;
with Elists; use Elists;
with Exp_Tss; use Exp_Tss;
with Exp_Util; use Exp_Util;
with Fname; use Fname;
with Freeze; use Freeze;
with Lib; use Lib;
with Lib.Xref; use Lib.Xref;
with Namet; use Namet;
with Nlists; use Nlists;
with Nmake; use Nmake;
with Output; use Output;
with Opt; use Opt;
with Rtsfind; use Rtsfind;
with Scans; use Scans;
with Scn; use Scn;
with Sem; use Sem;
with Sem_Ch8; use Sem_Ch8;
with Sem_Eval; use Sem_Eval;
with Sem_Res; use Sem_Res;
with Sem_Type; use Sem_Type;
with Sinfo; use Sinfo;
with Sinput; use Sinput;
with Snames; use Snames;
with Stand; use Stand;
with Style;
with Stringt; use Stringt;
with Targparm; use Targparm;
with Tbuild; use Tbuild;
with Ttypes; use Ttypes;
with Uname; use Uname;
package body Sem_Util is
function Build_Component_Subtype
(C : List_Id;
Loc : Source_Ptr;
T : Entity_Id) return Node_Id;
function Is_Fully_Initialized_Variant (Typ : Entity_Id) return Boolean;
function Has_Null_Extension (T : Entity_Id) return Boolean;
procedure Add_Access_Type_To_Process (E : Entity_Id; A : Entity_Id) is
L : Elist_Id;
begin
Ensure_Freeze_Node (E);
L := Access_Types_To_Process (Freeze_Node (E));
if No (L) then
L := New_Elmt_List;
Set_Access_Types_To_Process (Freeze_Node (E), L);
end if;
Append_Elmt (A, L);
end Add_Access_Type_To_Process;
function Alignment_In_Bits (E : Entity_Id) return Uint is
begin
return Alignment (E) * System_Storage_Unit;
end Alignment_In_Bits;
procedure Apply_Compile_Time_Constraint_Error
(N : Node_Id;
Msg : String;
Reason : RT_Exception_Code;
Ent : Entity_Id := Empty;
Typ : Entity_Id := Empty;
Loc : Source_Ptr := No_Location;
Rep : Boolean := True;
Warn : Boolean := False)
is
Stat : constant Boolean := Is_Static_Expression (N);
Rtyp : Entity_Id;
begin
if No (Typ) then
Rtyp := Etype (N);
else
Rtyp := Typ;
end if;
Discard_Node (
Compile_Time_Constraint_Error (N, Msg, Ent, Loc, Warn => Warn));
if not Rep then
return;
end if;
Rewrite (N,
Make_Raise_Constraint_Error (Sloc (N),
Reason => Reason));
Set_Analyzed (N, True);
Set_Etype (N, Rtyp);
Set_Raises_Constraint_Error (N);
if Stat then
Set_Is_Static_Expression (N);
end if;
end Apply_Compile_Time_Constraint_Error;
function Build_Actual_Subtype
(T : Entity_Id;
N : Node_Or_Entity_Id) return Node_Id
is
Obj : Node_Id;
Loc : constant Source_Ptr := Sloc (N);
Constraints : List_Id;
Decl : Node_Id;
Discr : Entity_Id;
Hi : Node_Id;
Lo : Node_Id;
Subt : Entity_Id;
Disc_Type : Entity_Id;
begin
if Nkind (N) = N_Defining_Identifier then
Obj := New_Reference_To (N, Loc);
else
Obj := N;
end if;
if Is_Array_Type (T) then
Constraints := New_List;
for J in 1 .. Number_Dimensions (T) loop
Lo :=
Make_Attribute_Reference (Loc,
Prefix =>
Duplicate_Subexpr_No_Checks (Obj, Name_Req => True),
Attribute_Name => Name_First,
Expressions => New_List (
Make_Integer_Literal (Loc, J)));
Hi :=
Make_Attribute_Reference (Loc,
Prefix =>
Duplicate_Subexpr_No_Checks (Obj, Name_Req => True),
Attribute_Name => Name_Last,
Expressions => New_List (
Make_Integer_Literal (Loc, J)));
Append (Make_Range (Loc, Lo, Hi), Constraints);
end loop;
elsif Has_Unknown_Discriminants (T) then
return T;
else
Constraints := New_List;
if Is_Private_Type (T) and then No (Full_View (T)) then
Disc_Type := Etype (Base_Type (T));
else
Disc_Type := T;
end if;
Discr := First_Discriminant (Disc_Type);
while Present (Discr) loop
Append_To (Constraints,
Make_Selected_Component (Loc,
Prefix =>
Duplicate_Subexpr_No_Checks (Obj),
Selector_Name => New_Occurrence_Of (Discr, Loc)));
Next_Discriminant (Discr);
end loop;
end if;
Subt :=
Make_Defining_Identifier (Loc,
Chars => New_Internal_Name ('S'));
Set_Is_Internal (Subt);
Decl :=
Make_Subtype_Declaration (Loc,
Defining_Identifier => Subt,
Subtype_Indication =>
Make_Subtype_Indication (Loc,
Subtype_Mark => New_Reference_To (T, Loc),
Constraint =>
Make_Index_Or_Discriminant_Constraint (Loc,
Constraints => Constraints)));
Mark_Rewrite_Insertion (Decl);
return Decl;
end Build_Actual_Subtype;
function Build_Actual_Subtype_Of_Component
(T : Entity_Id;
N : Node_Id) return Node_Id
is
Loc : constant Source_Ptr := Sloc (N);
P : constant Node_Id := Prefix (N);
D : Elmt_Id;
Id : Node_Id;
Indx_Type : Entity_Id;
Deaccessed_T : Entity_Id;
function Build_Actual_Array_Constraint return List_Id;
function Build_Actual_Record_Constraint return List_Id;
function Build_Actual_Array_Constraint return List_Id is
Constraints : constant List_Id := New_List;
Indx : Node_Id;
Hi : Node_Id;
Lo : Node_Id;
Old_Hi : Node_Id;
Old_Lo : Node_Id;
begin
Indx := First_Index (Deaccessed_T);
while Present (Indx) loop
Old_Lo := Type_Low_Bound (Etype (Indx));
Old_Hi := Type_High_Bound (Etype (Indx));
if Denotes_Discriminant (Old_Lo) then
Lo :=
Make_Selected_Component (Loc,
Prefix => New_Copy_Tree (P),
Selector_Name => New_Occurrence_Of (Entity (Old_Lo), Loc));
else
Lo := New_Copy_Tree (Old_Lo);
Set_Analyzed (Lo, False);
end if;
if Denotes_Discriminant (Old_Hi) then
Hi :=
Make_Selected_Component (Loc,
Prefix => New_Copy_Tree (P),
Selector_Name => New_Occurrence_Of (Entity (Old_Hi), Loc));
else
Hi := New_Copy_Tree (Old_Hi);
Set_Analyzed (Hi, False);
end if;
Append (Make_Range (Loc, Lo, Hi), Constraints);
Next_Index (Indx);
end loop;
return Constraints;
end Build_Actual_Array_Constraint;
function Build_Actual_Record_Constraint return List_Id is
Constraints : constant List_Id := New_List;
D : Elmt_Id;
D_Val : Node_Id;
begin
D := First_Elmt (Discriminant_Constraint (Deaccessed_T));
while Present (D) loop
if Denotes_Discriminant (Node (D)) then
D_Val := Make_Selected_Component (Loc,
Prefix => New_Copy_Tree (P),
Selector_Name => New_Occurrence_Of (Entity (Node (D)), Loc));
else
D_Val := New_Copy_Tree (Node (D));
end if;
Append (D_Val, Constraints);
Next_Elmt (D);
end loop;
return Constraints;
end Build_Actual_Record_Constraint;
begin
if In_Default_Expression then
return Empty;
elsif Nkind (N) = N_Explicit_Dereference then
if Is_Composite_Type (T)
and then not Is_Constrained (T)
and then not (Is_Class_Wide_Type (T)
and then Is_Constrained (Root_Type (T)))
and then not Has_Unknown_Discriminants (T)
then
if Is_Array_Type (Etype (N))
and then Is_Constrained (Etype (N))
then
return Empty;
else
Remove_Side_Effects (P);
return Build_Actual_Subtype (T, N);
end if;
else
return Empty;
end if;
end if;
if Ekind (T) = E_Access_Subtype then
Deaccessed_T := Designated_Type (T);
else
Deaccessed_T := T;
end if;
if Ekind (Deaccessed_T) = E_Array_Subtype then
Id := First_Index (Deaccessed_T);
Indx_Type := Underlying_Type (Etype (Id));
while Present (Id) loop
if Denotes_Discriminant (Type_Low_Bound (Indx_Type)) or else
Denotes_Discriminant (Type_High_Bound (Indx_Type))
then
Remove_Side_Effects (P);
return
Build_Component_Subtype (
Build_Actual_Array_Constraint, Loc, Base_Type (T));
end if;
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)
then
D := First_Elmt (Discriminant_Constraint (Deaccessed_T));
while Present (D) loop
if Denotes_Discriminant (Node (D)) then
Remove_Side_Effects (P);
return
Build_Component_Subtype (
Build_Actual_Record_Constraint, Loc, Base_Type (T));
end if;
Next_Elmt (D);
end loop;
end if;
return Empty;
end Build_Actual_Subtype_Of_Component;
function Build_Component_Subtype
(C : List_Id;
Loc : Source_Ptr;
T : Entity_Id) return Node_Id
is
Subt : Entity_Id;
Decl : Node_Id;
begin
if Is_Unchecked_Union (T) then
return Empty;
end if;
Subt :=
Make_Defining_Identifier (Loc,
Chars => New_Internal_Name ('S'));
Set_Is_Internal (Subt);
Decl :=
Make_Subtype_Declaration (Loc,
Defining_Identifier => Subt,
Subtype_Indication =>
Make_Subtype_Indication (Loc,
Subtype_Mark => New_Reference_To (Base_Type (T), Loc),
Constraint =>
Make_Index_Or_Discriminant_Constraint (Loc,
Constraints => C)));
Mark_Rewrite_Insertion (Decl);
return Decl;
end Build_Component_Subtype;
function Build_Discriminal_Subtype_Of_Component
(T : Entity_Id) return Node_Id
is
Loc : constant Source_Ptr := Sloc (T);
D : Elmt_Id;
Id : Node_Id;
function Build_Discriminal_Array_Constraint return List_Id;
function Build_Discriminal_Record_Constraint return List_Id;
function Build_Discriminal_Array_Constraint return List_Id is
Constraints : constant List_Id := New_List;
Indx : Node_Id;
Hi : Node_Id;
Lo : Node_Id;
Old_Hi : Node_Id;
Old_Lo : Node_Id;
begin
Indx := First_Index (T);
while Present (Indx) loop
Old_Lo := Type_Low_Bound (Etype (Indx));
Old_Hi := Type_High_Bound (Etype (Indx));
if Denotes_Discriminant (Old_Lo) then
Lo := New_Occurrence_Of (Discriminal (Entity (Old_Lo)), Loc);
else
Lo := New_Copy_Tree (Old_Lo);
end if;
if Denotes_Discriminant (Old_Hi) then
Hi := New_Occurrence_Of (Discriminal (Entity (Old_Hi)), Loc);
else
Hi := New_Copy_Tree (Old_Hi);
end if;
Append (Make_Range (Loc, Lo, Hi), Constraints);
Next_Index (Indx);
end loop;
return Constraints;
end Build_Discriminal_Array_Constraint;
function Build_Discriminal_Record_Constraint return List_Id is
Constraints : constant List_Id := New_List;
D : Elmt_Id;
D_Val : Node_Id;
begin
D := First_Elmt (Discriminant_Constraint (T));
while Present (D) loop
if Denotes_Discriminant (Node (D)) then
D_Val :=
New_Occurrence_Of (Discriminal (Entity (Node (D))), Loc);
else
D_Val := New_Copy_Tree (Node (D));
end if;
Append (D_Val, Constraints);
Next_Elmt (D);
end loop;
return Constraints;
end Build_Discriminal_Record_Constraint;
begin
if Ekind (T) = E_Array_Subtype then
Id := First_Index (T);
while Present (Id) loop
if Denotes_Discriminant (Type_Low_Bound (Etype (Id))) or else
Denotes_Discriminant (Type_High_Bound (Etype (Id)))
then
return Build_Component_Subtype
(Build_Discriminal_Array_Constraint, Loc, T);
end if;
Next_Index (Id);
end loop;
elsif Ekind (T) = E_Record_Subtype
and then Has_Discriminants (T)
and then not Has_Unknown_Discriminants (T)
then
D := First_Elmt (Discriminant_Constraint (T));
while Present (D) loop
if Denotes_Discriminant (Node (D)) then
return Build_Component_Subtype
(Build_Discriminal_Record_Constraint, Loc, T);
end if;
Next_Elmt (D);
end loop;
end if;
return Empty;
end Build_Discriminal_Subtype_Of_Component;
procedure Build_Elaboration_Entity (N : Node_Id; Spec_Id : Entity_Id) is
Loc : constant Source_Ptr := Sloc (N);
Unum : constant Unit_Number_Type := Get_Source_Unit (Loc);
Decl : Node_Id;
P : Natural;
Elab_Ent : Entity_Id;
begin
if Present (Elaboration_Entity (Spec_Id)) then
return;
end if;
Get_Name_String (Unit_Name (Unum));
Name_Buffer (Name_Len - 1 .. Name_Len) := "_E";
P := 2;
while P < Name_Len - 2 loop
if Name_Buffer (P) = '.' then
Name_Buffer (P + 2 .. Name_Len + 1) :=
Name_Buffer (P + 1 .. Name_Len);
Name_Len := Name_Len + 1;
Name_Buffer (P) := '_';
Name_Buffer (P + 1) := '_';
P := P + 3;
else
P := P + 1;
end if;
end loop;
Elab_Ent :=
Make_Defining_Identifier (Loc, Chars => Name_Find);
Set_Elaboration_Entity (Spec_Id, Elab_Ent);
if No (Declarations (Aux_Decls_Node (N))) then
Set_Declarations (Aux_Decls_Node (N), New_List);
end if;
Decl :=
Make_Object_Declaration (Loc,
Defining_Identifier => Elab_Ent,
Object_Definition =>
New_Occurrence_Of (Standard_Boolean, Loc),
Expression =>
New_Occurrence_Of (Standard_False, Loc));
Append_To (Declarations (Aux_Decls_Node (N)), Decl);
Analyze (Decl);
Set_Is_True_Constant (Elab_Ent, False);
Set_Current_Value (Elab_Ent, Empty);
Set_Has_Qualified_Name (Elab_Ent);
Set_Has_Fully_Qualified_Name (Elab_Ent);
end Build_Elaboration_Entity;
function Cannot_Raise_Constraint_Error (Expr : Node_Id) return Boolean is
begin
if Compile_Time_Known_Value (Expr) then
return True;
elsif Do_Range_Check (Expr) then
return False;
elsif Raises_Constraint_Error (Expr) then
return False;
else
case Nkind (Expr) is
when N_Identifier =>
return True;
when N_Expanded_Name =>
return True;
when N_Selected_Component =>
return not Do_Discriminant_Check (Expr);
when N_Attribute_Reference =>
if Do_Overflow_Check (Expr) then
return False;
elsif No (Expressions (Expr)) then
return True;
else
declare
N : Node_Id := First (Expressions (Expr));
begin
while Present (N) loop
if Cannot_Raise_Constraint_Error (N) then
Next (N);
else
return False;
end if;
end loop;
return True;
end;
end if;
when N_Type_Conversion =>
if Do_Overflow_Check (Expr)
or else Do_Length_Check (Expr)
or else Do_Tag_Check (Expr)
then
return False;
else
return
Cannot_Raise_Constraint_Error (Expression (Expr));
end if;
when N_Unchecked_Type_Conversion =>
return Cannot_Raise_Constraint_Error (Expression (Expr));
when N_Unary_Op =>
if Do_Overflow_Check (Expr) then
return False;
else
return
Cannot_Raise_Constraint_Error (Right_Opnd (Expr));
end if;
when N_Op_Divide |
N_Op_Mod |
N_Op_Rem
=>
if Do_Division_Check (Expr)
or else Do_Overflow_Check (Expr)
then
return False;
else
return
Cannot_Raise_Constraint_Error (Left_Opnd (Expr))
and then
Cannot_Raise_Constraint_Error (Right_Opnd (Expr));
end if;
when N_Op_Add |
N_Op_And |
N_Op_Concat |
N_Op_Eq |
N_Op_Expon |
N_Op_Ge |
N_Op_Gt |
N_Op_Le |
N_Op_Lt |
N_Op_Multiply |
N_Op_Ne |
N_Op_Or |
N_Op_Rotate_Left |
N_Op_Rotate_Right |
N_Op_Shift_Left |
N_Op_Shift_Right |
N_Op_Shift_Right_Arithmetic |
N_Op_Subtract |
N_Op_Xor
=>
if Do_Overflow_Check (Expr) then
return False;
else
return
Cannot_Raise_Constraint_Error (Left_Opnd (Expr))
and then
Cannot_Raise_Constraint_Error (Right_Opnd (Expr));
end if;
when others =>
return False;
end case;
end if;
end Cannot_Raise_Constraint_Error;
procedure Check_Fully_Declared (T : Entity_Id; N : Node_Id) is
begin
if Ekind (T) = E_Incomplete_Type then
if From_With_Type (T)
and then Present (Non_Limited_View (T))
and then Ekind (Non_Limited_View (T)) /= E_Incomplete_Type
then
null;
else
Error_Msg_NE
("premature usage of incomplete}", N, First_Subtype (T));
end if;
elsif Has_Private_Component (T)
and then not Is_Generic_Type (Root_Type (T))
and then not In_Default_Expression
then
if Is_Concurrent_Type (T)
and then not Comes_From_Source (T)
and then Nkind (N) = N_Object_Declaration
then
Error_Msg_NE ("type of& has incomplete component", N,
Defining_Identifier (N));
else
Error_Msg_NE
("premature usage of incomplete}", N, First_Subtype (T));
end if;
end if;
end Check_Fully_Declared;
procedure Check_Potentially_Blocking_Operation (N : Node_Id) is
S : Entity_Id;
begin
S := Scope (Current_Scope);
while Present (S) and then S /= Standard_Standard loop
if Is_Protected_Type (S) then
Error_Msg_N
("potentially blocking operation in protected operation?", N);
return;
end if;
S := Scope (S);
end loop;
end Check_Potentially_Blocking_Operation;
procedure Check_VMS (Construct : Node_Id) is
begin
if not OpenVMS_On_Target then
Error_Msg_N
("this construct is allowed only in Open'V'M'S", Construct);
end if;
end Check_VMS;
function Collect_Primitive_Operations (T : Entity_Id) return Elist_Id is
B_Type : constant Entity_Id := Base_Type (T);
B_Decl : constant Node_Id := Original_Node (Parent (B_Type));
B_Scope : Entity_Id := Scope (B_Type);
Op_List : Elist_Id;
Formal : Entity_Id;
Is_Prim : Boolean;
Formal_Derived : Boolean := False;
Id : Entity_Id;
begin
if Is_Tagged_Type (B_Type) then
return Primitive_Operations (B_Type);
elsif Is_Generic_Type (B_Type) then
if Nkind (B_Decl) = N_Formal_Type_Declaration
and then Nkind (Formal_Type_Definition (B_Decl))
= N_Formal_Derived_Type_Definition
then
Formal_Derived := True;
else
return New_Elmt_List;
end if;
end if;
Op_List := New_Elmt_List;
if B_Scope = Standard_Standard then
if B_Type = Standard_String then
Append_Elmt (Standard_Op_Concat, Op_List);
elsif B_Type = Standard_Wide_String then
Append_Elmt (Standard_Op_Concatw, Op_List);
else
null;
end if;
elsif (Is_Package (B_Scope)
and then Nkind (
Parent (Declaration_Node (First_Subtype (T))))
/= N_Package_Body)
or else Is_Derived_Type (B_Type)
then
if In_Open_Scopes (B_Scope)
and then Scope (T) = B_Scope
and then In_Private_Part (B_Scope)
then
Id := Next_Entity (T);
else
Id := Next_Entity (B_Type);
end if;
while Present (Id) loop
if Is_Overloadable (Id)
and then Nkind (Parent (Parent (Id)))
not in N_Formal_Subprogram_Declaration
then
Is_Prim := False;
if Base_Type (Etype (Id)) = B_Type then
Is_Prim := True;
else
Formal := First_Formal (Id);
while Present (Formal) loop
if Base_Type (Etype (Formal)) = B_Type then
Is_Prim := True;
exit;
elsif Ekind (Etype (Formal)) = E_Anonymous_Access_Type
and then Base_Type
(Designated_Type (Etype (Formal))) = B_Type
then
Is_Prim := True;
exit;
end if;
Next_Formal (Formal);
end loop;
end if;
if Is_Prim
and then (not Formal_Derived
or else Present (Alias (Id)))
then
Append_Elmt (Id, Op_List);
end if;
end if;
Next_Entity (Id);
if No (Id)
and then Chars (B_Scope) = Name_System
and then Scope (B_Scope) = Standard_Standard
and then Present_System_Aux
then
B_Scope := System_Aux_Id;
Id := First_Entity (System_Aux_Id);
end if;
end loop;
end if;
return Op_List;
end Collect_Primitive_Operations;
function Compile_Time_Constraint_Error
(N : Node_Id;
Msg : String;
Ent : Entity_Id := Empty;
Loc : Source_Ptr := No_Location;
Warn : Boolean := False) return Node_Id
is
Msgc : String (1 .. Msg'Length + 2);
Msgl : Natural;
Wmsg : Boolean;
P : Node_Id;
Msgs : Boolean;
Eloc : Source_Ptr;
begin
if not Error_Posted (N) then
if Loc /= No_Location then
Eloc := Loc;
else
Eloc := Sloc (N);
end if;
Msgc (1 .. Msg'Length) := Msg;
Msgc (Msg'Length + 1) := '!';
Msgl := Msg'Length + 1;
if Msg (Msg'Length) = '?' then
Wmsg := True;
elsif Warn
or else (Ada_Version = Ada_83 and then Comes_From_Source (N))
then
Msgl := Msgl + 1;
Msgc (Msgl) := '?';
Wmsg := True;
elsif In_Instance_Not_Visible then
Msgl := Msgl + 1;
Msgc (Msgl) := '?';
Wmsg := True;
else
Wmsg := False;
end if;
Msgs := True;
P := N;
loop
P := Parent (P);
if (Nkind (P) = N_And_Then
and then Compile_Time_Known_Value (Left_Opnd (P))
and then Is_False (Expr_Value (Left_Opnd (P))))
or else (Nkind (P) = N_Or_Else
and then Compile_Time_Known_Value (Left_Opnd (P))
and then Is_True (Expr_Value (Left_Opnd (P))))
then
Msgs := False;
exit;
elsif Nkind (P) = N_Component_Association
and then Nkind (Parent (P)) = N_Aggregate
then
null;
else
exit when Nkind (P) not in N_Subexpr;
end if;
end loop;
if Msgs then
if Present (Ent) then
Error_Msg_NEL (Msgc (1 .. Msgl), N, Ent, Eloc);
else
Error_Msg_NEL (Msgc (1 .. Msgl), N, Etype (N), Eloc);
end if;
if Wmsg then
if Inside_Init_Proc then
Error_Msg_NEL
("\& will be raised for objects of this type!?",
N, Standard_Constraint_Error, Eloc);
else
Error_Msg_NEL
("\& will be raised at run time!?",
N, Standard_Constraint_Error, Eloc);
end if;
else
Error_Msg_NEL
("\static expression raises&!",
N, Standard_Constraint_Error, Eloc);
end if;
end if;
end if;
return N;
end Compile_Time_Constraint_Error;
procedure Conditional_Delay (New_Ent, Old_Ent : Entity_Id) is
begin
if Has_Delayed_Freeze (Old_Ent) and then not Is_Frozen (Old_Ent) then
Set_Has_Delayed_Freeze (New_Ent);
end if;
end Conditional_Delay;
function Current_Entity (N : Node_Id) return Entity_Id is
begin
return Get_Name_Entity_Id (Chars (N));
end Current_Entity;
function Current_Entity_In_Scope (N : Node_Id) return Entity_Id is
E : Entity_Id;
CS : constant Entity_Id := Current_Scope;
Transient_Case : constant Boolean := Scope_Is_Transient;
begin
E := Get_Name_Entity_Id (Chars (N));
while Present (E)
and then Scope (E) /= CS
and then (not Transient_Case or else Scope (E) /= Scope (CS))
loop
E := Homonym (E);
end loop;
return E;
end Current_Entity_In_Scope;
function Current_Scope return Entity_Id is
begin
if Scope_Stack.Last = -1 then
return Standard_Standard;
else
declare
C : constant Entity_Id :=
Scope_Stack.Table (Scope_Stack.Last).Entity;
begin
if Present (C) then
return C;
else
return Standard_Standard;
end if;
end;
end if;
end Current_Scope;
function Current_Subprogram return Entity_Id is
Scop : constant Entity_Id := Current_Scope;
begin
if Is_Subprogram (Scop) or else Is_Generic_Subprogram (Scop) then
return Scop;
else
return Enclosing_Subprogram (Scop);
end if;
end Current_Subprogram;
function Defining_Entity (N : Node_Id) return Entity_Id is
K : constant Node_Kind := Nkind (N);
Err : Entity_Id := Empty;
begin
case K is
when
N_Subprogram_Declaration |
N_Abstract_Subprogram_Declaration |
N_Subprogram_Body |
N_Package_Declaration |
N_Subprogram_Renaming_Declaration |
N_Subprogram_Body_Stub |
N_Generic_Subprogram_Declaration |
N_Generic_Package_Declaration |
N_Formal_Subprogram_Declaration
=>
return Defining_Entity (Specification (N));
when
N_Component_Declaration |
N_Defining_Program_Unit_Name |
N_Discriminant_Specification |
N_Entry_Body |
N_Entry_Declaration |
N_Entry_Index_Specification |
N_Exception_Declaration |
N_Exception_Renaming_Declaration |
N_Formal_Object_Declaration |
N_Formal_Package_Declaration |
N_Formal_Type_Declaration |
N_Full_Type_Declaration |
N_Implicit_Label_Declaration |
N_Incomplete_Type_Declaration |
N_Loop_Parameter_Specification |
N_Number_Declaration |
N_Object_Declaration |
N_Object_Renaming_Declaration |
N_Package_Body_Stub |
N_Parameter_Specification |
N_Private_Extension_Declaration |
N_Private_Type_Declaration |
N_Protected_Body |
N_Protected_Body_Stub |
N_Protected_Type_Declaration |
N_Single_Protected_Declaration |
N_Single_Task_Declaration |
N_Subtype_Declaration |
N_Task_Body |
N_Task_Body_Stub |
N_Task_Type_Declaration
=>
return Defining_Identifier (N);
when N_Subunit =>
return Defining_Entity (Proper_Body (N));
when
N_Function_Instantiation |
N_Function_Specification |
N_Generic_Function_Renaming_Declaration |
N_Generic_Package_Renaming_Declaration |
N_Generic_Procedure_Renaming_Declaration |
N_Package_Body |
N_Package_Instantiation |
N_Package_Renaming_Declaration |
N_Package_Specification |
N_Procedure_Instantiation |
N_Procedure_Specification
=>
declare
Nam : constant Node_Id := Defining_Unit_Name (N);
begin
if Nkind (Nam) in N_Entity then
return Nam;
elsif Nam = Error then
Err :=
Make_Defining_Identifier (Sloc (N),
Chars => New_Internal_Name ('T'));
Set_Defining_Unit_Name (N, Err);
return Err;
else
return Defining_Identifier (Nam);
end if;
end;
when N_Block_Statement =>
return Entity (Identifier (N));
when others =>
raise Program_Error;
end case;
end Defining_Entity;
function Denotes_Discriminant
(N : Node_Id;
Check_Protected : Boolean := False) return Boolean
is
E : Entity_Id;
begin
if not Is_Entity_Name (N)
or else No (Entity (N))
then
return False;
else
E := Entity (N);
end if;
return Ekind (E) = E_Discriminant
or else
(Check_Protected
and then Ekind (E) = E_In_Parameter
and then Present (Discriminal_Link (E))
and then
(Is_Protected_Type (Scope (Discriminal_Link (E)))
or else
Is_Concurrent_Record_Type (Scope (Discriminal_Link (E)))));
end Denotes_Discriminant;
function Depends_On_Discriminant (N : Node_Id) return Boolean is
L : Node_Id;
H : Node_Id;
begin
Get_Index_Bounds (N, L, H);
return Denotes_Discriminant (L) or else Denotes_Discriminant (H);
end Depends_On_Discriminant;
function Designate_Same_Unit
(Name1 : Node_Id;
Name2 : Node_Id) return Boolean
is
K1 : constant Node_Kind := Nkind (Name1);
K2 : constant Node_Kind := Nkind (Name2);
function Prefix_Node (N : Node_Id) return Node_Id;
function Select_Node (N : Node_Id) return Node_Id;
function Prefix_Node (N : Node_Id) return Node_Id is
begin
if Nkind (N) = N_Defining_Program_Unit_Name then
return Name (N);
else
return Prefix (N);
end if;
end Prefix_Node;
function Select_Node (N : Node_Id) return Node_Id is
begin
if Nkind (N) = N_Defining_Program_Unit_Name then
return Defining_Identifier (N);
else
return Selector_Name (N);
end if;
end Select_Node;
begin
if (K1 = N_Identifier or else
K1 = N_Defining_Identifier)
and then
(K2 = N_Identifier or else
K2 = N_Defining_Identifier)
then
return Chars (Name1) = Chars (Name2);
elsif
(K1 = N_Expanded_Name or else
K1 = N_Selected_Component or else
K1 = N_Defining_Program_Unit_Name)
and then
(K2 = N_Expanded_Name or else
K2 = N_Selected_Component or else
K2 = N_Defining_Program_Unit_Name)
then
return
(Chars (Select_Node (Name1)) = Chars (Select_Node (Name2)))
and then
Designate_Same_Unit (Prefix_Node (Name1), Prefix_Node (Name2));
else
return False;
end if;
end Designate_Same_Unit;
function Enclosing_Generic_Body
(E : Entity_Id) return Node_Id
is
P : Node_Id;
Decl : Node_Id;
Spec : Node_Id;
begin
P := Parent (E);
while Present (P) loop
if Nkind (P) = N_Package_Body
or else Nkind (P) = N_Subprogram_Body
then
Spec := Corresponding_Spec (P);
if Present (Spec) then
Decl := Unit_Declaration_Node (Spec);
if Nkind (Decl) = N_Generic_Package_Declaration
or else Nkind (Decl) = N_Generic_Subprogram_Declaration
then
return P;
end if;
end if;
end if;
P := Parent (P);
end loop;
return Empty;
end Enclosing_Generic_Body;
function Enclosing_Lib_Unit_Entity return Entity_Id is
Unit_Entity : Entity_Id := Current_Scope;
begin
while (Present (Scope (Unit_Entity))
and then Scope (Unit_Entity) /= Standard_Standard)
and not Is_Child_Unit (Unit_Entity)
loop
Unit_Entity := Scope (Unit_Entity);
end loop;
return Unit_Entity;
end Enclosing_Lib_Unit_Entity;
function Enclosing_Lib_Unit_Node (N : Node_Id) return Node_Id is
Current_Node : Node_Id := N;
begin
while Present (Current_Node)
and then Nkind (Current_Node) /= N_Compilation_Unit
loop
Current_Node := Parent (Current_Node);
end loop;
if Nkind (Current_Node) /= N_Compilation_Unit then
return Empty;
end if;
return Current_Node;
end Enclosing_Lib_Unit_Node;
function Enclosing_Subprogram (E : Entity_Id) return Entity_Id is
Dynamic_Scope : constant Entity_Id := Enclosing_Dynamic_Scope (E);
begin
if Dynamic_Scope = Standard_Standard then
return Empty;
elsif Ekind (Dynamic_Scope) = E_Subprogram_Body then
return Corresponding_Spec (Parent (Parent (Dynamic_Scope)));
elsif Ekind (Dynamic_Scope) = E_Block then
return Enclosing_Subprogram (Dynamic_Scope);
elsif Ekind (Dynamic_Scope) = E_Task_Type then
return Get_Task_Body_Procedure (Dynamic_Scope);
elsif Convention (Dynamic_Scope) = Convention_Protected then
return Protected_Body_Subprogram (Dynamic_Scope);
else
return Dynamic_Scope;
end if;
end Enclosing_Subprogram;
procedure Ensure_Freeze_Node (E : Entity_Id) is
FN : Node_Id;
begin
if No (Freeze_Node (E)) then
FN := Make_Freeze_Entity (Sloc (E));
Set_Has_Delayed_Freeze (E);
Set_Freeze_Node (E, FN);
Set_Access_Types_To_Process (FN, No_Elist);
Set_TSS_Elist (FN, No_Elist);
Set_Entity (FN, E);
end if;
end Ensure_Freeze_Node;
procedure Enter_Name (Def_Id : Node_Id) is
C : constant Entity_Id := Current_Entity (Def_Id);
E : constant Entity_Id := Current_Entity_In_Scope (Def_Id);
S : constant Entity_Id := Current_Scope;
begin
Generate_Definition (Def_Id);
if Present (E) then
if Etype (E) = Any_Type then
Set_Is_Immediately_Visible (E, False);
elsif Nkind (Parent (E)) = N_Package_Renaming_Declaration
and then not Comes_From_Source (E)
then
Set_Is_Immediately_Visible (E, False);
elsif Nkind (Parent (Def_Id)) = N_Package_Renaming_Declaration
and then not Comes_From_Source (Def_Id)
then
Set_Is_Immediately_Visible (E, False);
elsif Nkind (Parent (Def_Id)) = N_Full_Type_Declaration
and then Present (Corresponding_Remote_Type (Def_Id))
then
null;
elsif Chars (E) = Name_uController then
null;
elsif (Is_Overloadable (E) and then Is_Inherited_Operation (E))
or else Is_Internal (E)
then
declare
Prev : Entity_Id;
Prev_Vis : Entity_Id;
Decl : constant Node_Id := Parent (E);
begin
Prev := First_Entity (Current_Scope);
while Present (Prev)
and then Next_Entity (Prev) /= E
loop
Next_Entity (Prev);
end loop;
if No (Prev) then
pragma Assert
(Nkind (Parent (Decl)) = N_Generic_Subprogram_Declaration);
null;
else
Set_Next_Entity (Prev, Next_Entity (E));
if No (Next_Entity (Prev)) then
Set_Last_Entity (Current_Scope, Prev);
end if;
if E = Current_Entity (E) then
Prev_Vis := Empty;
else
Prev_Vis := Current_Entity (E);
while Homonym (Prev_Vis) /= E loop
Prev_Vis := Homonym (Prev_Vis);
end loop;
end if;
if Present (Prev_Vis) then
Set_Homonym (Prev_Vis, Homonym (E));
else
Set_Name_Entity_Id (Chars (E), Homonym (E));
end if;
end if;
end;
elsif Present (Etype (E))
and then Is_Concurrent_Type (Etype (E))
and then E = Def_Id
then
return;
elsif In_Instance_Not_Visible then
null;
elsif Is_Child_Unit (E)
and then In_Open_Scopes (Scope (E))
and then not Is_Immediately_Visible (E)
then
null;
elsif Is_Child_Unit (Def_Id)
and then Is_Package_Body_Entity (E)
and then not In_Package_Body (Current_Scope)
then
null;
else
Error_Msg_Sloc := Sloc (E);
if Nkind (Parent (E)) = N_Incomplete_Type_Declaration
and then Nkind (Parent (Def_Id)) = N_Private_Type_Declaration
then
Error_Msg_N
("incomplete type cannot be completed" &
" with a private declaration",
Parent (Def_Id));
Set_Is_Immediately_Visible (E, False);
Set_Full_View (E, Def_Id);
elsif Ekind (E) = E_Discriminant
and then Present (Scope (Def_Id))
and then Scope (Def_Id) /= Current_Scope
then
Error_Msg_Sloc := Sloc (Def_Id);
Error_Msg_N ("& conflicts with declaration#", E);
return;
elsif Error_Posted (E)
and then Sloc (E) = No_Location
and then Nkind (Parent (E)) = N_Package_Specification
and then Current_Scope = Standard_Standard
then
Set_Scope (Def_Id, Current_Scope);
return;
else
Error_Msg_N ("& conflicts with declaration#", Def_Id);
if Ekind (E) = E_Component
or else Ekind (E) = E_Discriminant
then
return;
end if;
end if;
if Nkind (Parent (Parent (Def_Id)))
= N_Generic_Subprogram_Declaration
and then Def_Id =
Defining_Entity (Specification (Parent (Parent (Def_Id))))
then
Error_Msg_N ("\generic units cannot be overloaded", Def_Id);
end if;
if S = Standard_Standard then
raise Unrecoverable_Error;
else
null;
end if;
end if;
end if;
if Ekind (Def_Id) = E_Discriminant
or else Ekind (Def_Id) = E_Component
then
null;
elsif Present (Etype (Def_Id)) then
null;
else
Set_Ekind (Def_Id, E_Void);
Set_Etype (Def_Id, Any_Type);
end if;
if Ekind (Def_Id) = E_Discriminant
or else Ekind (Def_Id) = E_Component
or else (No (Corresponding_Remote_Type (Def_Id))
and then not Is_Itype (Def_Id))
then
Set_Is_Immediately_Visible (Def_Id);
Set_Current_Entity (Def_Id);
end if;
Set_Homonym (Def_Id, C);
Append_Entity (Def_Id, S);
Set_Public_Status (Def_Id);
if Warn_On_Hiding
and then Present (C)
and then Length_Of_Name (Chars (C)) /= 1
and then Comes_From_Source (C)
and then Comes_From_Source (Def_Id)
and then In_Extended_Main_Source_Unit (Def_Id)
then
Error_Msg_Sloc := Sloc (C);
Error_Msg_N ("declaration hides &#?", Def_Id);
end if;
end Enter_Name;
procedure Explain_Limited_Type (T : Entity_Id; N : Node_Id) is
C : Entity_Id;
begin
if Is_Array_Type (T) then
Error_Msg_Node_2 := T;
Error_Msg_NE
("component type& of type& is limited", N, Component_Type (T));
Explain_Limited_Type (Component_Type (T), N);
elsif Is_Record_Type (T) then
if Is_Limited_Record (Base_Type (T)) then
return;
end if;
C := First_Component (T);
while Present (C) loop
if Is_Limited_Type (Etype (C))
and then
(Comes_From_Source (C)
or else
(Present (Original_Record_Component (C))
and then
Comes_From_Source (Original_Record_Component (C))))
then
Error_Msg_Node_2 := T;
Error_Msg_NE ("\component& of type& has limited type", N, C);
Explain_Limited_Type (Etype (C), N);
return;
end if;
Next_Component (C);
end loop;
return;
end if;
end Explain_Limited_Type;
function Find_Corresponding_Discriminant
(Id : Node_Id;
Typ : Entity_Id) return Entity_Id
is
Par_Disc : Entity_Id;
Old_Disc : Entity_Id;
New_Disc : Entity_Id;
begin
Par_Disc := Original_Record_Component (Original_Discriminant (Id));
if Is_Private_Type (Scope (Par_Disc))
and then not Has_Discriminants (Scope (Par_Disc))
and then Present (Full_View (Scope (Par_Disc)))
then
Old_Disc := First_Discriminant (Full_View (Scope (Par_Disc)));
else
Old_Disc := First_Discriminant (Scope (Par_Disc));
end if;
if Is_Class_Wide_Type (Typ) then
New_Disc := First_Discriminant (Root_Type (Typ));
else
New_Disc := First_Discriminant (Typ);
end if;
while Present (Old_Disc) and then Present (New_Disc) loop
if Old_Disc = Par_Disc then
return New_Disc;
else
Next_Discriminant (Old_Disc);
Next_Discriminant (New_Disc);
end if;
end loop;
raise Program_Error;
end Find_Corresponding_Discriminant;
function Find_Static_Alternative (N : Node_Id) return Node_Id is
Expr : constant Node_Id := Expression (N);
Val : constant Uint := Expr_Value (Expr);
Alt : Node_Id;
Choice : Node_Id;
begin
Alt := First (Alternatives (N));
Search : loop
if Nkind (Alt) /= N_Pragma then
Choice := First (Discrete_Choices (Alt));
while Present (Choice) loop
if Nkind (Choice) = N_Others_Choice then
exit Search;
elsif Nkind (Choice) = N_Range then
exit Search when
Val >= Expr_Value (Low_Bound (Choice))
and then
Val <= Expr_Value (High_Bound (Choice));
elsif Is_Entity_Name (Choice)
and then Is_Type (Entity (Choice))
then
exit Search when Is_In_Range (Expr, Etype (Choice));
elsif Nkind (Choice) = N_Subtype_Indication then
declare
C : constant Node_Id := Constraint (Choice);
R : constant Node_Id := Range_Expression (C);
begin
exit Search when
Val >= Expr_Value (Low_Bound (R))
and then
Val <= Expr_Value (High_Bound (R));
end;
else
exit Search when Val = Expr_Value (Choice);
end if;
Next (Choice);
end loop;
end if;
Next (Alt);
pragma Assert (Present (Alt));
end loop Search;
return Alt;
end Find_Static_Alternative;
function First_Actual (Node : Node_Id) return Node_Id is
N : Node_Id;
begin
if No (Parameter_Associations (Node)) then
return Empty;
end if;
N := First (Parameter_Associations (Node));
if Nkind (N) = N_Parameter_Association then
return First_Named_Actual (Node);
else
return N;
end if;
end First_Actual;
function Full_Qualified_Name (E : Entity_Id) return String_Id is
Res : String_Id;
pragma Warnings (Off, Res);
function Internal_Full_Qualified_Name (E : Entity_Id) return String_Id;
function Internal_Full_Qualified_Name (E : Entity_Id) return String_Id is
Ent : Entity_Id := E;
Parent_Name : String_Id := No_String;
begin
if Nkind (Ent) = N_Defining_Program_Unit_Name then
Ent := Defining_Identifier (Ent);
end if;
if Present (Scope (Scope (Ent))) then
Parent_Name := Internal_Full_Qualified_Name (Scope (Ent));
end if;
if Chars (Ent) = No_Name then
return Parent_Name;
end if;
if Parent_Name /= No_String then
Start_String (Parent_Name);
Store_String_Char (Get_Char_Code ('.'));
else
Start_String;
end if;
Get_Name_String (Chars (Ent));
Set_All_Upper_Case;
Store_String_Chars (Name_Buffer (1 .. Name_Len));
return End_String;
end Internal_Full_Qualified_Name;
begin
Res := Internal_Full_Qualified_Name (E);
Store_String_Char (Get_Char_Code (ASCII.nul));
return End_String;
end Full_Qualified_Name;
procedure Gather_Components
(Typ : Entity_Id;
Comp_List : Node_Id;
Governed_By : List_Id;
Into : Elist_Id;
Report_Errors : out Boolean)
is
Assoc : Node_Id;
Variant : Node_Id;
Discrete_Choice : Node_Id;
Comp_Item : Node_Id;
Discrim : Entity_Id;
Discrim_Name : Node_Id;
Discrim_Value : Node_Id;
begin
Report_Errors := False;
if No (Comp_List) or else Null_Present (Comp_List) then
return;
elsif Present (Component_Items (Comp_List)) then
Comp_Item := First (Component_Items (Comp_List));
else
Comp_Item := Empty;
end if;
while Present (Comp_Item) loop
if Nkind (Comp_Item) = N_Component_Declaration
and then Chars (Defining_Identifier (Comp_Item)) /= Name_uTag
and then Chars (Defining_Identifier (Comp_Item)) /= Name_uParent
and then Chars (Defining_Identifier (Comp_Item)) /= Name_uController
then
Append_Elmt (Defining_Identifier (Comp_Item), Into);
end if;
Next (Comp_Item);
end loop;
if No (Variant_Part (Comp_List)) then
return;
else
Discrim_Name := Name (Variant_Part (Comp_List));
Variant := First_Non_Pragma (Variants (Variant_Part (Comp_List)));
end if;
Assoc := First (Governed_By);
Find_Constraint : loop
Discrim := First (Choices (Assoc));
exit Find_Constraint when Chars (Discrim_Name) = Chars (Discrim)
or else (Present (Corresponding_Discriminant (Entity (Discrim)))
and then
Chars (Corresponding_Discriminant (Entity (Discrim)))
= Chars (Discrim_Name))
or else Chars (Original_Record_Component (Entity (Discrim)))
= Chars (Discrim_Name);
if No (Next (Assoc)) then
if not Is_Constrained (Typ)
and then Is_Derived_Type (Typ)
and then Present (Stored_Constraint (Typ))
then
declare
D : Entity_Id;
C : Elmt_Id;
begin
D := First_Discriminant (Etype (Typ));
C := First_Elmt (Stored_Constraint (Typ));
while Present (D)
and then Present (C)
loop
if Chars (Discrim_Name) = Chars (D) then
if Is_Entity_Name (Node (C))
and then Entity (Node (C)) = Entity (Discrim)
then
null;
else
Assoc :=
Make_Component_Association (Sloc (Typ),
New_List
(New_Occurrence_Of (D, Sloc (Typ))),
Duplicate_Subexpr_No_Checks (Node (C)));
end if;
exit Find_Constraint;
end if;
D := Next_Discriminant (D);
Next_Elmt (C);
end loop;
end;
end if;
end if;
if No (Next (Assoc)) then
Error_Msg_NE (" missing value for discriminant&",
First (Governed_By), Discrim_Name);
Report_Errors := True;
return;
end if;
Next (Assoc);
end loop Find_Constraint;
Discrim_Value := Expression (Assoc);
if not Is_OK_Static_Expression (Discrim_Value) then
Error_Msg_FE
("value for discriminant & must be static!",
Discrim_Value, Discrim);
Why_Not_Static (Discrim_Value);
Report_Errors := True;
return;
end if;
Search_For_Discriminant_Value : declare
Low : Node_Id;
High : Node_Id;
UI_High : Uint;
UI_Low : Uint;
UI_Discrim_Value : constant Uint := Expr_Value (Discrim_Value);
begin
Find_Discrete_Value : while Present (Variant) loop
Discrete_Choice := First (Discrete_Choices (Variant));
while Present (Discrete_Choice) loop
exit Find_Discrete_Value when
Nkind (Discrete_Choice) = N_Others_Choice;
Get_Index_Bounds (Discrete_Choice, Low, High);
UI_Low := Expr_Value (Low);
UI_High := Expr_Value (High);
exit Find_Discrete_Value when
UI_Low <= UI_Discrim_Value
and then
UI_High >= UI_Discrim_Value;
Next (Discrete_Choice);
end loop;
Next_Non_Pragma (Variant);
end loop Find_Discrete_Value;
end Search_For_Discriminant_Value;
if No (Variant) then
Error_Msg_NE
("value of discriminant & is out of range", Discrim_Value, Discrim);
Report_Errors := True;
return;
end if;
Gather_Components (Empty,
Component_List (Variant), Governed_By, Into, Report_Errors);
end Gather_Components;
function Get_Actual_Subtype (N : Node_Id) return Entity_Id is
Typ : constant Entity_Id := Etype (N);
Utyp : Entity_Id := Underlying_Type (Typ);
Decl : Node_Id;
Atyp : Entity_Id;
begin
if not Present (Utyp) then
Utyp := Typ;
end if;
if Nkind (N) = N_Identifier
and then
(Is_Formal (Entity (N))
or else Ekind (Entity (N)) = E_Constant
or else Ekind (Entity (N)) = E_Variable)
and then Present (Actual_Subtype (Entity (N)))
then
return Actual_Subtype (Entity (N));
elsif Is_Unchecked_Union (Base_Type (Utyp)) then
return Typ;
elsif (not Is_Constrained (Typ))
and then (Is_Array_Type (Utyp)
or else (Is_Record_Type (Utyp)
and then Has_Discriminants (Utyp)))
and then not Has_Unknown_Discriminants (Utyp)
and then not (Ekind (Utyp) = E_String_Literal_Subtype)
then
if In_Default_Expression then
return Typ;
elsif Is_Private_Type (Typ)
and then not Has_Discriminants (Typ)
then
return Typ;
else
Decl := Build_Actual_Subtype (Typ, N);
Atyp := Defining_Identifier (Decl);
if Atyp /= Typ then
Set_Parent (Decl, N);
Set_Is_Itype (Atyp);
Analyze (Decl, Suppress => All_Checks);
Set_Associated_Node_For_Itype (Atyp, N);
Set_Has_Delayed_Freeze (Atyp, False);
Freeze_Itype (Atyp, N);
return Atyp;
else
return Typ;
end if;
end if;
else
return Typ;
end if;
end Get_Actual_Subtype;
function Get_Actual_Subtype_If_Available (N : Node_Id) return Entity_Id is
Typ : constant Entity_Id := Etype (N);
begin
if Nkind (N) = N_Identifier
and then
(Is_Formal (Entity (N))
or else Ekind (Entity (N)) = E_Constant
or else Ekind (Entity (N)) = E_Variable)
and then Present (Actual_Subtype (Entity (N)))
then
return Actual_Subtype (Entity (N));
else
return Typ;
end if;
end Get_Actual_Subtype_If_Available;
function Get_Default_External_Name (E : Node_Or_Entity_Id) return Node_Id is
begin
Get_Decoded_Name_String (Chars (E));
if Opt.External_Name_Imp_Casing = Uppercase then
Set_Casing (All_Upper_Case);
else
Set_Casing (All_Lower_Case);
end if;
return
Make_String_Literal (Sloc (E),
Strval => String_From_Name_Buffer);
end Get_Default_External_Name;
function Get_Enum_Lit_From_Pos
(T : Entity_Id;
Pos : Uint;
Loc : Source_Ptr) return Node_Id
is
Lit : Node_Id;
begin
if Root_Type (T) = Standard_Character
or else Root_Type (T) = Standard_Wide_Character
or else Root_Type (T) = Standard_Wide_Wide_Character
then
Set_Character_Literal_Name (UI_To_CC (Pos));
return
Make_Character_Literal (Loc,
Chars => Name_Find,
Char_Literal_Value => Pos);
else
Lit := First_Literal (Base_Type (T));
for J in 1 .. UI_To_Int (Pos) loop
Next_Literal (Lit);
end loop;
return New_Occurrence_Of (Lit, Loc);
end if;
end Get_Enum_Lit_From_Pos;
function Get_Generic_Entity (N : Node_Id) return Entity_Id is
Ent : constant Entity_Id := Entity (Name (N));
begin
if Present (Renamed_Object (Ent)) then
return Renamed_Object (Ent);
else
return Ent;
end if;
end Get_Generic_Entity;
procedure Get_Index_Bounds (N : Node_Id; L, H : out Node_Id) is
Kind : constant Node_Kind := Nkind (N);
R : Node_Id;
begin
if Kind = N_Range then
L := Low_Bound (N);
H := High_Bound (N);
elsif Kind = N_Subtype_Indication then
R := Range_Expression (Constraint (N));
if R = Error then
L := Error;
H := Error;
return;
else
L := Low_Bound (Range_Expression (Constraint (N)));
H := High_Bound (Range_Expression (Constraint (N)));
end if;
elsif Is_Entity_Name (N) and then Is_Type (Entity (N)) then
if Error_Posted (Scalar_Range (Entity (N))) then
L := Error;
H := Error;
elsif Nkind (Scalar_Range (Entity (N))) = N_Subtype_Indication then
Get_Index_Bounds (Scalar_Range (Entity (N)), L, H);
else
L := Low_Bound (Scalar_Range (Entity (N)));
H := High_Bound (Scalar_Range (Entity (N)));
end if;
else
L := N;
H := N;
end if;
end Get_Index_Bounds;
procedure Get_Library_Unit_Name_String (Decl_Node : Node_Id) is
Unit_Name_Id : constant Unit_Name_Type := Get_Unit_Name (Decl_Node);
begin
Get_Unit_Name_String (Unit_Name_Id);
Name_Len := Name_Len - 7;
pragma Assert (Name_Buffer (Name_Len + 1) = ' ');
end Get_Library_Unit_Name_String;
function Get_Name_Entity_Id (Id : Name_Id) return Entity_Id is
begin
return Entity_Id (Get_Name_Table_Info (Id));
end Get_Name_Entity_Id;
function Get_Referenced_Object (N : Node_Id) return Node_Id is
R : Node_Id := N;
begin
while Is_Entity_Name (R)
and then Present (Renamed_Object (Entity (R)))
loop
R := Renamed_Object (Entity (R));
end loop;
return R;
end Get_Referenced_Object;
function Get_Subprogram_Body (E : Entity_Id) return Node_Id is
Decl : Node_Id;
begin
Decl := Unit_Declaration_Node (E);
if Nkind (Decl) = N_Subprogram_Body then
return Decl;
else
if Present (Corresponding_Body (Decl)) then
return Unit_Declaration_Node (Corresponding_Body (Decl));
else
return Empty;
end if;
end if;
end Get_Subprogram_Body;
function Get_Task_Body_Procedure (E : Entity_Id) return Node_Id is
begin
return Task_Body_Procedure (Declaration_Node (Root_Type (E)));
end Get_Task_Body_Procedure;
function Has_Access_Values (T : Entity_Id) return Boolean is
Typ : constant Entity_Id := Underlying_Type (T);
begin
if No (Typ) then
return False;
elsif Is_Access_Type (Typ) then
return True;
elsif Is_Array_Type (Typ) then
return Has_Access_Values (Component_Type (Typ));
elsif Is_Record_Type (Typ) then
declare
Comp : Entity_Id;
begin
Comp := First_Entity (Typ);
while Present (Comp) loop
if (Ekind (Comp) = E_Component
or else
Ekind (Comp) = E_Discriminant)
and then Has_Access_Values (Etype (Comp))
then
return True;
end if;
Next_Entity (Comp);
end loop;
end;
return False;
else
return False;
end if;
end Has_Access_Values;
function Has_Declarations (N : Node_Id) return Boolean is
K : constant Node_Kind := Nkind (N);
begin
return K = N_Accept_Statement
or else K = N_Block_Statement
or else K = N_Compilation_Unit_Aux
or else K = N_Entry_Body
or else K = N_Package_Body
or else K = N_Protected_Body
or else K = N_Subprogram_Body
or else K = N_Task_Body
or else K = N_Package_Specification;
end Has_Declarations;
function Has_Infinities (E : Entity_Id) return Boolean is
begin
return
Is_Floating_Point_Type (E)
and then Nkind (Scalar_Range (E)) = N_Range
and then Includes_Infinities (Scalar_Range (E));
end Has_Infinities;
function Has_Null_Extension (T : Entity_Id) return Boolean is
B : constant Entity_Id := Base_Type (T);
Comps : Node_Id;
Ext : Node_Id;
begin
if Nkind (Parent (B)) = N_Full_Type_Declaration
and then Present (Record_Extension_Part (Type_Definition (Parent (B))))
then
Ext := Record_Extension_Part (Type_Definition (Parent (B)));
if Present (Ext) then
if Null_Present (Ext) then
return True;
else
Comps := Component_List (Ext);
return Null_Present (Comps)
or else No (Next (First (Component_Items (Comps))));
end if;
else
return False;
end if;
else
return False;
end if;
end Has_Null_Extension;
function Has_Private_Component (Type_Id : Entity_Id) return Boolean is
Btype : Entity_Id := Base_Type (Type_Id);
Component : Entity_Id;
begin
if Error_Posted (Type_Id)
or else Error_Posted (Btype)
then
return False;
end if;
if Is_Class_Wide_Type (Btype) then
Btype := Root_Type (Btype);
end if;
if Is_Private_Type (Btype) then
declare
UT : constant Entity_Id := Underlying_Type (Btype);
begin
if No (UT) then
if No (Full_View (Btype)) then
return not Is_Generic_Type (Btype)
and then not Is_Generic_Type (Root_Type (Btype));
else
return not Is_Generic_Type (Root_Type (Full_View (Btype)));
end if;
else
return not Is_Frozen (UT) and then Has_Private_Component (UT);
end if;
end;
elsif Is_Array_Type (Btype) then
return Has_Private_Component (Component_Type (Btype));
elsif Is_Record_Type (Btype) then
Component := First_Component (Btype);
while Present (Component) loop
if Has_Private_Component (Etype (Component)) then
return True;
end if;
Next_Component (Component);
end loop;
return False;
elsif Is_Protected_Type (Btype)
and then Present (Corresponding_Record_Type (Btype))
then
return Has_Private_Component (Corresponding_Record_Type (Btype));
else
return False;
end if;
end Has_Private_Component;
function Has_Stream (T : Entity_Id) return Boolean is
E : Entity_Id;
begin
if No (T) then
return False;
elsif Is_RTE (Root_Type (T), RE_Root_Stream_Type) then
return True;
elsif Is_Array_Type (T) then
return Has_Stream (Component_Type (T));
elsif Is_Record_Type (T) then
E := First_Component (T);
while Present (E) loop
if Has_Stream (Etype (E)) then
return True;
else
Next_Component (E);
end if;
end loop;
return False;
elsif Is_Private_Type (T) then
return Has_Stream (Underlying_Type (T));
else
return False;
end if;
end Has_Stream;
function Has_Tagged_Component (Typ : Entity_Id) return Boolean is
Comp : Entity_Id;
begin
if Is_Private_Type (Typ)
and then Present (Underlying_Type (Typ))
then
return Has_Tagged_Component (Underlying_Type (Typ));
elsif Is_Array_Type (Typ) then
return Has_Tagged_Component (Component_Type (Typ));
elsif Is_Tagged_Type (Typ) then
return True;
elsif Is_Record_Type (Typ) then
Comp := First_Component (Typ);
while Present (Comp) loop
if Has_Tagged_Component (Etype (Comp)) then
return True;
end if;
Comp := Next_Component (Typ);
end loop;
return False;
else
return False;
end if;
end Has_Tagged_Component;
function In_Instance return Boolean is
S : Entity_Id := Current_Scope;
begin
while Present (S)
and then S /= Standard_Standard
loop
if (Ekind (S) = E_Function
or else Ekind (S) = E_Package
or else Ekind (S) = E_Procedure)
and then Is_Generic_Instance (S)
then
return True;
end if;
S := Scope (S);
end loop;
return False;
end In_Instance;
function In_Instance_Body return Boolean is
S : Entity_Id := Current_Scope;
begin
while Present (S)
and then S /= Standard_Standard
loop
if (Ekind (S) = E_Function
or else Ekind (S) = E_Procedure)
and then Is_Generic_Instance (S)
then
return True;
elsif Ekind (S) = E_Package
and then In_Package_Body (S)
and then Is_Generic_Instance (S)
then
return True;
end if;
S := Scope (S);
end loop;
return False;
end In_Instance_Body;
function In_Instance_Not_Visible return Boolean is
S : Entity_Id := Current_Scope;
begin
while Present (S)
and then S /= Standard_Standard
loop
if (Ekind (S) = E_Function
or else Ekind (S) = E_Procedure)
and then Is_Generic_Instance (S)
then
return True;
elsif Ekind (S) = E_Package
and then (In_Package_Body (S) or else In_Private_Part (S))
and then Is_Generic_Instance (S)
then
return True;
end if;
S := Scope (S);
end loop;
return False;
end In_Instance_Not_Visible;
function In_Instance_Visible_Part return Boolean is
S : Entity_Id := Current_Scope;
begin
while Present (S)
and then S /= Standard_Standard
loop
if Ekind (S) = E_Package
and then Is_Generic_Instance (S)
and then not In_Package_Body (S)
and then not In_Private_Part (S)
then
return True;
end if;
S := Scope (S);
end loop;
return False;
end In_Instance_Visible_Part;
function In_Package_Body return Boolean is
S : Entity_Id := Current_Scope;
begin
while Present (S)
and then S /= Standard_Standard
loop
if Ekind (S) = E_Package
and then In_Package_Body (S)
then
return True;
else
S := Scope (S);
end if;
end loop;
return False;
end In_Package_Body;
function In_Subprogram_Or_Concurrent_Unit return Boolean is
E : Entity_Id;
K : Entity_Kind;
begin
E := Current_Scope;
loop
K := Ekind (E);
if K in Subprogram_Kind
or else K in Concurrent_Kind
or else K in Generic_Subprogram_Kind
then
return True;
elsif E = Standard_Standard then
return False;
end if;
E := Scope (E);
end loop;
end In_Subprogram_Or_Concurrent_Unit;
function In_Visible_Part (Scope_Id : Entity_Id) return Boolean is
begin
return
Is_Package (Scope_Id)
and then In_Open_Scopes (Scope_Id)
and then not In_Package_Body (Scope_Id)
and then not In_Private_Part (Scope_Id);
end In_Visible_Part;
procedure Insert_Explicit_Dereference (N : Node_Id) is
New_Prefix : constant Node_Id := Relocate_Node (N);
Ent : Entity_Id := Empty;
I : Interp_Index;
It : Interp;
T : Entity_Id;
begin
Save_Interps (N, New_Prefix);
Rewrite (N,
Make_Explicit_Dereference (Sloc (N), Prefix => New_Prefix));
Set_Etype (N, Designated_Type (Etype (New_Prefix)));
if Is_Overloaded (New_Prefix) then
Set_Etype (N, Any_Type);
Get_First_Interp (New_Prefix, I, It);
while Present (It.Nam) loop
T := It.Typ;
if Is_Access_Type (T) then
Add_One_Interp (N, Designated_Type (T), Designated_Type (T));
end if;
Get_Next_Interp (I, It);
end loop;
End_Interp_List;
else
if Is_Entity_Name (New_Prefix) then
Ent := Entity (New_Prefix);
elsif Nkind (New_Prefix) = N_Selected_Component then
Ent := Entity (Selector_Name (New_Prefix));
end if;
if Present (Ent) then
Generate_Reference (Ent, New_Prefix);
end if;
end if;
end Insert_Explicit_Dereference;
function Is_AAMP_Float (E : Entity_Id) return Boolean is
begin
pragma Assert (Is_Type (E));
return AAMP_On_Target
and then Is_Floating_Point_Type (E)
and then E = Base_Type (E);
end Is_AAMP_Float;
function Is_Actual_Parameter (N : Node_Id) return Boolean is
PK : constant Node_Kind := Nkind (Parent (N));
begin
case PK is
when N_Parameter_Association =>
return N = Explicit_Actual_Parameter (Parent (N));
when N_Function_Call | N_Procedure_Call_Statement =>
return Is_List_Member (N)
and then
List_Containing (N) = Parameter_Associations (Parent (N));
when others =>
return False;
end case;
end Is_Actual_Parameter;
function Is_Aliased_View (Obj : Node_Id) return Boolean is
E : Entity_Id;
begin
if Is_Entity_Name (Obj) then
E := Entity (Obj);
return
(Is_Object (E)
and then
(Is_Aliased (E)
or else (Present (Renamed_Object (E))
and then Is_Aliased_View (Renamed_Object (E)))))
or else ((Is_Formal (E)
or else Ekind (E) = E_Generic_In_Out_Parameter
or else Ekind (E) = E_Generic_In_Parameter)
and then Is_Tagged_Type (Etype (E)))
or else ((Ekind (E) = E_Task_Type
or else Ekind (E) = E_Protected_Type)
and then In_Open_Scopes (E))
or else (Is_Type (E) and then E = Current_Scope)
or else (Is_Incomplete_Or_Private_Type (E)
and then Full_View (E) = Current_Scope);
elsif Nkind (Obj) = N_Selected_Component then
return Is_Aliased (Entity (Selector_Name (Obj)));
elsif Nkind (Obj) = N_Indexed_Component then
return Has_Aliased_Components (Etype (Prefix (Obj)))
or else
(Is_Access_Type (Etype (Prefix (Obj)))
and then
Has_Aliased_Components
(Designated_Type (Etype (Prefix (Obj)))));
elsif Nkind (Obj) = N_Unchecked_Type_Conversion
or else Nkind (Obj) = N_Type_Conversion
then
return Is_Tagged_Type (Etype (Obj))
and then Is_Aliased_View (Expression (Obj));
elsif Nkind (Obj) = N_Explicit_Dereference then
return Nkind (Original_Node (Obj)) /= N_Function_Call;
else
return False;
end if;
end Is_Aliased_View;
function Is_Ancestor_Package
(E1 : Entity_Id;
E2 : Entity_Id) return Boolean
is
Par : Entity_Id;
begin
Par := E2;
while Present (Par)
and then Par /= Standard_Standard
loop
if Par = E1 then
return True;
end if;
Par := Scope (Par);
end loop;
return False;
end Is_Ancestor_Package;
function Is_Atomic_Object (N : Node_Id) return Boolean is
function Object_Has_Atomic_Components (N : Node_Id) return Boolean;
function Is_Atomic_Prefix (N : Node_Id) return Boolean;
function Is_Atomic_Prefix (N : Node_Id) return Boolean is
begin
if Is_Access_Type (Etype (N)) then
return
Has_Atomic_Components (Designated_Type (Etype (N)));
else
return Object_Has_Atomic_Components (N);
end if;
end Is_Atomic_Prefix;
function Object_Has_Atomic_Components (N : Node_Id) return Boolean is
begin
if Has_Atomic_Components (Etype (N))
or else Is_Atomic (Etype (N))
then
return True;
elsif Is_Entity_Name (N)
and then (Has_Atomic_Components (Entity (N))
or else Is_Atomic (Entity (N)))
then
return True;
elsif Nkind (N) = N_Indexed_Component
or else Nkind (N) = N_Selected_Component
then
return Is_Atomic_Prefix (Prefix (N));
else
return False;
end if;
end Object_Has_Atomic_Components;
begin
if Is_Atomic (Etype (N))
or else (Is_Entity_Name (N) and then Is_Atomic (Entity (N)))
then
return True;
elsif Nkind (N) = N_Indexed_Component
or else Nkind (N) = N_Selected_Component
then
return Is_Atomic_Prefix (Prefix (N));
else
return False;
end if;
end Is_Atomic_Object;
function Is_Dependent_Component_Of_Mutable_Object
(Object : Node_Id) return Boolean
is
P : Node_Id;
Prefix_Type : Entity_Id;
P_Aliased : Boolean := False;
Comp : Entity_Id;
function Has_Dependent_Constraint (Comp : Entity_Id) return Boolean;
function Is_Declared_Within_Variant (Comp : Entity_Id) return Boolean;
function Has_Dependent_Constraint (Comp : Entity_Id) return Boolean is
Comp_Decl : constant Node_Id := Parent (Comp);
Subt_Indic : constant Node_Id :=
Subtype_Indication (Component_Definition (Comp_Decl));
Constr : Node_Id;
Assn : Node_Id;
begin
if Nkind (Subt_Indic) = N_Subtype_Indication then
Constr := Constraint (Subt_Indic);
if Nkind (Constr) = N_Index_Or_Discriminant_Constraint then
Assn := First (Constraints (Constr));
while Present (Assn) loop
case Nkind (Assn) is
when N_Subtype_Indication |
N_Range |
N_Identifier
=>
if Depends_On_Discriminant (Assn) then
return True;
end if;
when N_Discriminant_Association =>
if Depends_On_Discriminant (Expression (Assn)) then
return True;
end if;
when others =>
null;
end case;
Next (Assn);
end loop;
end if;
end if;
return False;
end Has_Dependent_Constraint;
function Is_Declared_Within_Variant (Comp : Entity_Id) return Boolean is
Comp_Decl : constant Node_Id := Parent (Comp);
Comp_List : constant Node_Id := Parent (Comp_Decl);
begin
return Nkind (Parent (Comp_List)) = N_Variant;
end Is_Declared_Within_Variant;
begin
if Is_Variable (Object) then
if Nkind (Object) = N_Selected_Component then
P := Prefix (Object);
Prefix_Type := Etype (P);
if Is_Entity_Name (P) then
if Ekind (Entity (P)) = E_Generic_In_Out_Parameter then
Prefix_Type := Base_Type (Prefix_Type);
end if;
if Is_Aliased (Entity (P)) then
P_Aliased := True;
end if;
elsif Nkind (P) = N_Explicit_Dereference
and then not (Comes_From_Source (P))
then
P := Original_Node (P);
Prefix_Type := Etype (P);
else
null;
end if;
if Is_Access_Type (Prefix_Type)
or else Nkind (P) = N_Explicit_Dereference
then
return False;
end if;
Comp :=
Original_Record_Component (Entity (Selector_Name (Object)));
if not Is_Constrained (Prefix_Type)
and then (not Is_Indefinite_Subtype (Prefix_Type)
or else
(Is_Generic_Type (Prefix_Type)
and then Ekind (Current_Scope) = E_Generic_Package
and then In_Package_Body (Current_Scope)))
and then (Is_Declared_Within_Variant (Comp)
or else Has_Dependent_Constraint (Comp))
and then not P_Aliased
then
return True;
else
return
Is_Dependent_Component_Of_Mutable_Object (Prefix (Object));
end if;
elsif Nkind (Object) = N_Indexed_Component
or else Nkind (Object) = N_Slice
then
return Is_Dependent_Component_Of_Mutable_Object (Prefix (Object));
elsif Nkind (Object) = N_Type_Conversion then
return
Is_Dependent_Component_Of_Mutable_Object (Expression (Object));
end if;
end if;
return False;
end Is_Dependent_Component_Of_Mutable_Object;
function Is_Dereferenced (N : Node_Id) return Boolean is
P : constant Node_Id := Parent (N);
begin
return
(Nkind (P) = N_Selected_Component
or else
Nkind (P) = N_Explicit_Dereference
or else
Nkind (P) = N_Indexed_Component
or else
Nkind (P) = N_Slice)
and then Prefix (P) = N;
end Is_Dereferenced;
function Is_Descendent_Of (T1 : Entity_Id; T2 : Entity_Id) return Boolean is
T : Entity_Id;
Etyp : Entity_Id;
begin
pragma Assert (Nkind (T1) in N_Entity);
pragma Assert (Nkind (T2) in N_Entity);
T := Base_Type (T1);
if T = T2 then
return True;
elsif Ekind (T) = E_Class_Wide_Type then
return Etype (T) = T2;
else
loop
Etyp := Etype (T);
if Etyp = T2 then
return True;
elsif T = T1
or else T = Etyp
then
return False;
elsif No (Etyp) then
return False;
elsif Is_Private_Type (T) and then Etyp = Full_View (T) then
return False;
elsif Is_Private_Type (Etyp) and then Full_View (Etyp) = T then
return False;
end if;
T := Base_Type (Etyp);
end loop;
end if;
raise Program_Error;
end Is_Descendent_Of;
function Is_Descendent_Of_Address (T1 : Entity_Id) return Boolean is
begin
if not RTU_Loaded (System) then
return False;
else
return Is_Descendent_Of (T1, Base_Type (RTE (RE_Address)));
end if;
end Is_Descendent_Of_Address;
function Is_False (U : Uint) return Boolean is
begin
return (U = 0);
end Is_False;
function Is_Fixed_Model_Number (U : Ureal; T : Entity_Id) return Boolean is
S : constant Ureal := Small_Value (T);
M : Urealp.Save_Mark;
R : Boolean;
begin
M := Urealp.Mark;
R := (U = UR_Trunc (U / S) * S);
Urealp.Release (M);
return R;
end Is_Fixed_Model_Number;
function Is_Fully_Initialized_Type (Typ : Entity_Id) return Boolean is
begin
if Is_Scalar_Type (Typ) then
return False;
elsif Is_Access_Type (Typ) then
return True;
elsif Is_Array_Type (Typ) then
if Is_Fully_Initialized_Type (Component_Type (Typ)) then
return True;
end if;
if Is_Constrained (Typ) then
declare
Indx : Node_Id;
Indx_Typ : Entity_Id;
Lbd, Hbd : Node_Id;
begin
Indx := First_Index (Typ);
while Present (Indx) loop
if Etype (Indx) = Any_Type then
return False;
elsif Nkind (Indx) = N_Range then
Lbd := Low_Bound (Indx);
Hbd := High_Bound (Indx);
else
Indx_Typ := Etype (Indx);
if Is_Private_Type (Indx_Typ) then
Indx_Typ := Full_View (Indx_Typ);
end if;
if No (Indx_Typ) then
return False;
else
Lbd := Type_Low_Bound (Indx_Typ);
Hbd := Type_High_Bound (Indx_Typ);
end if;
end if;
if Compile_Time_Known_Value (Lbd)
and then Compile_Time_Known_Value (Hbd)
then
if Expr_Value (Hbd) < Expr_Value (Lbd) then
return True;
end if;
end if;
Next_Index (Indx);
end loop;
end;
end if;
return False;
elsif Is_Record_Type (Typ) then
if Has_Discriminants (Typ)
and then
Present (Discriminant_Default_Value (First_Discriminant (Typ)))
and then Is_Fully_Initialized_Variant (Typ)
then
return True;
end if;
if Is_Controlled (Typ) then
declare
Utyp : constant Entity_Id := Underlying_Type (Typ);
begin
if Present (Utyp) then
declare
Init : constant Entity_Id :=
(Find_Prim_Op
(Underlying_Type (Typ), Name_Initialize));
begin
if Present (Init)
and then Comes_From_Source (Init)
and then not
Is_Predefined_File_Name
(File_Name (Get_Source_File_Index (Sloc (Init))))
then
return True;
elsif Has_Null_Extension (Typ)
and then
Is_Fully_Initialized_Type
(Etype (Base_Type (Typ)))
then
return True;
end if;
end;
end if;
end;
end if;
declare
Ent : Entity_Id;
begin
Ent := First_Entity (Typ);
while Present (Ent) loop
if Chars (Ent) = Name_uController then
null;
elsif Ekind (Ent) = E_Component
and then (No (Parent (Ent))
or else No (Expression (Parent (Ent))))
and then not Is_Fully_Initialized_Type (Etype (Ent))
then
return False;
end if;
Next_Entity (Ent);
end loop;
end;
return True;
elsif Is_Concurrent_Type (Typ) then
return True;
elsif Is_Private_Type (Typ) then
declare
U : constant Entity_Id := Underlying_Type (Typ);
begin
if No (U) then
return False;
else
return Is_Fully_Initialized_Type (U);
end if;
end;
else
return False;
end if;
end Is_Fully_Initialized_Type;
function Is_Fully_Initialized_Variant (Typ : Entity_Id) return Boolean is
Loc : constant Source_Ptr := Sloc (Typ);
Constraints : constant List_Id := New_List;
Components : constant Elist_Id := New_Elmt_List;
Comp_Elmt : Elmt_Id;
Comp_Id : Node_Id;
Comp_List : Node_Id;
Discr : Entity_Id;
Discr_Val : Node_Id;
Report_Errors : Boolean;
begin
if Serious_Errors_Detected > 0 then
return False;
end if;
if Is_Record_Type (Typ)
and then Nkind (Parent (Typ)) = N_Full_Type_Declaration
and then Nkind (Type_Definition (Parent (Typ))) = N_Record_Definition
then
Comp_List := Component_List (Type_Definition (Parent (Typ)));
Discr := First_Discriminant (Typ);
while Present (Discr) loop
if Nkind (Parent (Discr)) = N_Discriminant_Specification then
Discr_Val := Expression (Parent (Discr));
if Present (Discr_Val)
and then Is_OK_Static_Expression (Discr_Val)
then
Append_To (Constraints,
Make_Component_Association (Loc,
Choices => New_List (New_Occurrence_Of (Discr, Loc)),
Expression => New_Copy (Discr_Val)));
else
return False;
end if;
else
return False;
end if;
Next_Discriminant (Discr);
end loop;
Gather_Components
(Typ => Typ,
Comp_List => Comp_List,
Governed_By => Constraints,
Into => Components,
Report_Errors => Report_Errors);
Comp_Elmt := First_Elmt (Components);
while Present (Comp_Elmt) loop
Comp_Id := Node (Comp_Elmt);
if Ekind (Comp_Id) = E_Component
and then (No (Parent (Comp_Id))
or else No (Expression (Parent (Comp_Id))))
and then not Is_Fully_Initialized_Type (Etype (Comp_Id))
then
return False;
end if;
Next_Elmt (Comp_Elmt);
end loop;
return True;
elsif Is_Private_Type (Typ) then
declare
U : constant Entity_Id := Underlying_Type (Typ);
begin
if No (U) then
return False;
else
return Is_Fully_Initialized_Variant (U);
end if;
end;
else
return False;
end if;
end Is_Fully_Initialized_Variant;
function Is_Inherited_Operation (E : Entity_Id) return Boolean is
Kind : constant Node_Kind := Nkind (Parent (E));
begin
pragma Assert (Is_Overloadable (E));
return Kind = N_Full_Type_Declaration
or else Kind = N_Private_Extension_Declaration
or else Kind = N_Subtype_Declaration
or else (Ekind (E) = E_Enumeration_Literal
and then Is_Derived_Type (Etype (E)));
end Is_Inherited_Operation;
function Is_Library_Level_Entity (E : Entity_Id) return Boolean is
begin
if Ekind (E) in Formal_Kind then
return False;
end if;
return Enclosing_Dynamic_Scope (E) = Standard_Standard;
end Is_Library_Level_Entity;
function Is_Local_Variable_Reference (Expr : Node_Id) return Boolean is
begin
if not Is_Entity_Name (Expr) then
return False;
else
declare
Ent : constant Entity_Id := Entity (Expr);
Sub : constant Entity_Id := Enclosing_Subprogram (Ent);
begin
if Ekind (Ent) /= E_Variable
and then
Ekind (Ent) /= E_In_Out_Parameter
then
return False;
else
return Present (Sub) and then Sub = Current_Subprogram;
end if;
end;
end if;
end Is_Local_Variable_Reference;
function Is_Lvalue (N : Node_Id) return Boolean is
P : constant Node_Id := Parent (N);
begin
case Nkind (P) is
when N_Assignment_Statement =>
return N = Name (P);
when N_Attribute_Reference |
N_Expanded_Name |
N_Explicit_Dereference |
N_Indexed_Component |
N_Reference |
N_Selected_Component |
N_Slice =>
return N = Prefix (P);
when N_Function_Call |
N_Procedure_Call_Statement |
N_Accept_Statement |
N_Parameter_Association =>
return True;
when N_Type_Conversion =>
return Is_Lvalue (P);
when N_Object_Renaming_Declaration =>
return True;
when others =>
return False;
end case;
end Is_Lvalue;
function Is_Object_Reference (N : Node_Id) return Boolean is
begin
if Is_Entity_Name (N) then
return Is_Object (Entity (N));
else
case Nkind (N) is
when N_Indexed_Component | N_Slice =>
return Is_Object_Reference (Prefix (N));
when N_Function_Call =>
return True;
when N_Attribute_Reference =>
return Attribute_Name (N) = Name_Input;
when N_Selected_Component =>
return
Is_Object_Reference (Selector_Name (N))
and then Is_Object_Reference (Prefix (N));
when N_Explicit_Dereference =>
return True;
when N_Type_Conversion =>
return Is_Tagged_Type (Etype (Subtype_Mark (N)))
and then Is_Tagged_Type (Etype (Expression (N)))
and then Is_Object_Reference (Expression (N));
when N_Unchecked_Type_Conversion =>
return True;
when others =>
return False;
end case;
end if;
end Is_Object_Reference;
function Is_OK_Variable_For_Out_Formal (AV : Node_Id) return Boolean is
begin
Note_Possible_Modification (AV);
if Paren_Count (AV) > 0 and then Comes_From_Source (AV) then
return False;
elsif Is_Variable (AV) then
return True;
elsif Nkind (AV) = N_Unchecked_Type_Conversion then
if Nkind (Original_Node (AV)) = N_Function_Call then
return False;
elsif Comes_From_Source (AV)
and then Nkind (Original_Node (Expression (AV))) = N_Function_Call
then
return False;
elsif Nkind (Original_Node (AV)) = N_Type_Conversion then
return Is_OK_Variable_For_Out_Formal (Expression (AV));
else
return True;
end if;
elsif Nkind (AV) = N_Type_Conversion then
if Is_Variable (Expression (AV))
and then Paren_Count (Expression (AV)) = 0
then
Note_Possible_Modification (Expression (AV));
return True;
elsif Raises_Constraint_Error (Expression (AV))
and then Paren_Count (Expression (AV)) = 0
and then Is_Variable (Original_Node (Expression (AV)))
then
return True;
else
return False;
end if;
elsif Original_Node (AV) /= AV then
return Is_OK_Variable_For_Out_Formal (Original_Node (AV));
else
return False;
end if;
end Is_OK_Variable_For_Out_Formal;
function Is_Partially_Initialized_Type (Typ : Entity_Id) return Boolean is
begin
if Is_Scalar_Type (Typ) then
return False;
elsif Is_Access_Type (Typ) then
return True;
elsif Is_Array_Type (Typ) then
if Is_Partially_Initialized_Type (Component_Type (Typ)) then
return True;
else
return Is_Fully_Initialized_Type (Typ);
end if;
elsif Is_Record_Type (Typ) then
if Has_Discriminants (Typ) then
return True;
elsif Is_Tagged_Type (Typ) then
return True;
else
declare
Ent : Entity_Id;
Component_Present : Boolean := False;
begin
Ent := First_Entity (Typ);
while Present (Ent) loop
if Ekind (Ent) = E_Component then
Component_Present := True;
if Present (Parent (Ent))
and then Present (Expression (Parent (Ent)))
then
return True;
elsif Is_Partially_Initialized_Type (Etype (Ent)) then
return True;
end if;
end if;
Next_Entity (Ent);
end loop;
if Component_Present then
return False;
else
return True;
end if;
end;
end if;
elsif Is_Concurrent_Type (Typ) then
return True;
elsif Is_Private_Type (Typ) then
declare
U : constant Entity_Id := Underlying_Type (Typ);
begin
if No (U) then
return True;
else
return Is_Partially_Initialized_Type (U);
end if;
end;
else
return True;
end if;
end Is_Partially_Initialized_Type;
function Is_RCI_Pkg_Spec_Or_Body (Cunit : Node_Id) return Boolean is
function Is_RCI_Pkg_Decl_Cunit (Cunit : Node_Id) return Boolean;
function Is_RCI_Pkg_Decl_Cunit (Cunit : Node_Id) return Boolean is
The_Unit : constant Node_Id := Unit (Cunit);
begin
if Nkind (The_Unit) /= N_Package_Declaration then
return False;
end if;
return Is_Remote_Call_Interface (Defining_Entity (The_Unit));
end Is_RCI_Pkg_Decl_Cunit;
begin
return Is_RCI_Pkg_Decl_Cunit (Cunit)
or else
(Nkind (Unit (Cunit)) = N_Package_Body
and then Is_RCI_Pkg_Decl_Cunit (Library_Unit (Cunit)));
end Is_RCI_Pkg_Spec_Or_Body;
function Is_Remote_Access_To_Class_Wide_Type
(E : Entity_Id) return Boolean
is
D : Entity_Id;
function Comes_From_Limited_Private_Type_Declaration
(E : Entity_Id)
return Boolean;
function Comes_From_Limited_Private_Type_Declaration (E : in Entity_Id)
return Boolean
is
N : constant Node_Id := Declaration_Node (E);
begin
if Nkind (N) = N_Private_Type_Declaration
and then Limited_Present (N)
then
return True;
end if;
if Nkind (N) = N_Private_Extension_Declaration then
return
Comes_From_Limited_Private_Type_Declaration (Etype (E))
or else
(Is_Remote_Types (Etype (E))
and then Is_Limited_Record (Etype (E))
and then Has_Private_Declaration (Etype (E)));
end if;
return False;
end Comes_From_Limited_Private_Type_Declaration;
begin
if not (Is_Remote_Call_Interface (E)
or else Is_Remote_Types (E))
or else Ekind (E) /= E_General_Access_Type
then
return False;
end if;
D := Designated_Type (E);
if Ekind (D) /= E_Class_Wide_Type then
return False;
end if;
return Comes_From_Limited_Private_Type_Declaration
(Defining_Identifier (Parent (D)));
end Is_Remote_Access_To_Class_Wide_Type;
function Is_Remote_Access_To_Subprogram_Type
(E : Entity_Id) return Boolean
is
begin
return (Ekind (E) = E_Access_Subprogram_Type
or else (Ekind (E) = E_Record_Type
and then Present (Corresponding_Remote_Type (E))))
and then (Is_Remote_Call_Interface (E)
or else Is_Remote_Types (E));
end Is_Remote_Access_To_Subprogram_Type;
function Is_Remote_Call (N : Node_Id) return Boolean is
begin
if Nkind (N) /= N_Procedure_Call_Statement
and then Nkind (N) /= N_Function_Call
then
return False;
elsif Nkind (Name (N)) in N_Has_Entity
and then Is_Remote_Call_Interface (Entity (Name (N)))
then
return True;
elsif Nkind (Name (N)) = N_Explicit_Dereference
and then Is_Remote_Access_To_Subprogram_Type
(Etype (Prefix (Name (N))))
then
return True;
elsif Present (Controlling_Argument (N))
and then Is_Remote_Access_To_Class_Wide_Type
(Etype (Controlling_Argument (N)))
then
return True;
end if;
return False;
end Is_Remote_Call;
function Is_Selector_Name (N : Node_Id) return Boolean is
begin
if not Is_List_Member (N) then
declare
P : constant Node_Id := Parent (N);
K : constant Node_Kind := Nkind (P);
begin
return
(K = N_Expanded_Name or else
K = N_Generic_Association or else
K = N_Parameter_Association or else
K = N_Selected_Component)
and then Selector_Name (P) = N;
end;
else
declare
L : constant List_Id := List_Containing (N);
P : constant Node_Id := Parent (L);
begin
return (Nkind (P) = N_Discriminant_Association
and then Selector_Names (P) = L)
or else
(Nkind (P) = N_Component_Association
and then Choices (P) = L);
end;
end if;
end Is_Selector_Name;
function Is_Statement (N : Node_Id) return Boolean is
begin
return
Nkind (N) in N_Statement_Other_Than_Procedure_Call
or else Nkind (N) = N_Procedure_Call_Statement;
end Is_Statement;
function Is_Transfer (N : Node_Id) return Boolean is
Kind : constant Node_Kind := Nkind (N);
begin
if Kind = N_Return_Statement
or else
Kind = N_Goto_Statement
or else
Kind = N_Raise_Statement
or else
Kind = N_Requeue_Statement
then
return True;
elsif (Kind = N_Exit_Statement or else Kind in N_Raise_xxx_Error)
and then No (Condition (N))
then
return True;
elsif Kind = N_Procedure_Call_Statement
and then Is_Entity_Name (Name (N))
and then Present (Entity (Name (N)))
and then No_Return (Entity (Name (N)))
then
return True;
elsif Nkind (Original_Node (N)) = N_Raise_Statement then
return True;
else
return False;
end if;
end Is_Transfer;
function Is_True (U : Uint) return Boolean is
begin
return (U /= 0);
end Is_True;
function Is_Variable (N : Node_Id) return Boolean is
Orig_Node : constant Node_Id := Original_Node (N);
function In_Protected_Function (E : Entity_Id) return Boolean;
function Is_Variable_Prefix (P : Node_Id) return Boolean;
function In_Protected_Function (E : Entity_Id) return Boolean is
Prot : constant Entity_Id := Scope (E);
S : Entity_Id;
begin
if not Is_Protected_Type (Prot) then
return False;
else
S := Current_Scope;
while Present (S) and then S /= Prot loop
if Ekind (S) = E_Function
and then Scope (S) = Prot
then
return True;
end if;
S := Scope (S);
end loop;
return False;
end if;
end In_Protected_Function;
function Is_Variable_Prefix (P : Node_Id) return Boolean is
begin
if Is_Access_Type (Etype (P)) then
return not Is_Access_Constant (Root_Type (Etype (P)));
elsif Nkind (P) = N_Type_Conversion
and then not Comes_From_Source (P)
and then Is_Array_Type (Etype (P))
and then Is_Packed (Etype (P))
then
return Is_Variable (Expression (P));
else
return Is_Variable (P);
end if;
end Is_Variable_Prefix;
begin
if Nkind (N) in N_Subexpr and then Assignment_OK (N) then
return True;
elsif Nkind (N) = N_Explicit_Dereference
and then Nkind (Orig_Node) /= N_Explicit_Dereference
and then Is_Access_Type (Etype (Orig_Node))
then
return Is_Variable_Prefix (Original_Node (Prefix (N)));
elsif Is_Entity_Name (Orig_Node) then
declare
E : constant Entity_Id := Entity (Orig_Node);
K : constant Entity_Kind := Ekind (E);
begin
return (K = E_Variable
and then Nkind (Parent (E)) /= N_Exception_Handler)
or else (K = E_Component
and then not In_Protected_Function (E))
or else K = E_Out_Parameter
or else K = E_In_Out_Parameter
or else K = E_Generic_In_Out_Parameter
or else (Is_Type (E) and then In_Open_Scopes (E))
or else (Is_Incomplete_Or_Private_Type (E)
and then In_Open_Scopes (Full_View (E)));
end;
else
case Nkind (Orig_Node) is
when N_Indexed_Component | N_Slice =>
return Is_Variable_Prefix (Prefix (Orig_Node));
when N_Selected_Component =>
return Is_Variable_Prefix (Prefix (Orig_Node))
and then Is_Variable (Selector_Name (Orig_Node));
when N_Explicit_Dereference =>
declare
Typ : constant Entity_Id := Etype (Prefix (Orig_Node));
begin
return Is_Access_Type (Typ)
and then not Is_Access_Constant (Root_Type (Typ))
and then Ekind (Typ) /= E_Access_Subprogram_Type;
end;
when N_Type_Conversion =>
return Is_Variable (Expression (Orig_Node))
and then
(not Comes_From_Source (Orig_Node)
or else
(Is_Tagged_Type (Etype (Subtype_Mark (Orig_Node)))
and then
Is_Tagged_Type (Etype (Expression (Orig_Node)))));
when N_Unchecked_Type_Conversion =>
return Is_Variable (Expression (Orig_Node));
when others =>
return False;
end case;
end if;
end Is_Variable;
function Is_Volatile_Object (N : Node_Id) return Boolean is
function Object_Has_Volatile_Components (N : Node_Id) return Boolean;
function Is_Volatile_Prefix (N : Node_Id) return Boolean;
function Is_Volatile_Prefix (N : Node_Id) return Boolean is
Typ : constant Entity_Id := Etype (N);
begin
if Is_Access_Type (Typ) then
declare
Dtyp : constant Entity_Id := Designated_Type (Typ);
begin
return Is_Volatile (Dtyp)
or else Has_Volatile_Components (Dtyp);
end;
else
return Object_Has_Volatile_Components (N);
end if;
end Is_Volatile_Prefix;
function Object_Has_Volatile_Components (N : Node_Id) return Boolean is
Typ : constant Entity_Id := Etype (N);
begin
if Is_Volatile (Typ)
or else Has_Volatile_Components (Typ)
then
return True;
elsif Is_Entity_Name (N)
and then (Has_Volatile_Components (Entity (N))
or else Is_Volatile (Entity (N)))
then
return True;
elsif Nkind (N) = N_Indexed_Component
or else Nkind (N) = N_Selected_Component
then
return Is_Volatile_Prefix (Prefix (N));
else
return False;
end if;
end Object_Has_Volatile_Components;
begin
if Is_Volatile (Etype (N))
or else (Is_Entity_Name (N) and then Is_Volatile (Entity (N)))
then
return True;
elsif Nkind (N) = N_Indexed_Component
or else Nkind (N) = N_Selected_Component
then
return Is_Volatile_Prefix (Prefix (N));
else
return False;
end if;
end Is_Volatile_Object;
procedure Kill_Current_Values is
S : Entity_Id;
procedure Kill_Current_Values_For_Entity_Chain (E : Entity_Id);
procedure Kill_Current_Values_For_Entity_Chain (E : Entity_Id) is
Ent : Entity_Id;
begin
Ent := E;
while Present (Ent) loop
if Is_Object (Ent) then
Set_Current_Value (Ent, Empty);
if not Can_Never_Be_Null (Ent) then
Set_Is_Known_Non_Null (Ent, False);
end if;
end if;
Next_Entity (Ent);
end loop;
end Kill_Current_Values_For_Entity_Chain;
begin
Kill_All_Checks;
S := Current_Scope;
Scope_Loop : loop
Kill_Current_Values_For_Entity_Chain (First_Entity (S));
if Ekind (S) = E_Package
or else
Ekind (S) = E_Generic_Package
or else
Is_Concurrent_Type (S)
then
Kill_Current_Values_For_Entity_Chain (First_Private_Entity (S));
end if;
if Ekind (S) = E_Block
or else (Ekind (S) = E_Package
and then not Is_Library_Level_Entity (S))
then
S := Scope (S);
else
exit Scope_Loop;
end if;
end loop Scope_Loop;
end Kill_Current_Values;
procedure Kill_Size_Check_Code (E : Entity_Id) is
begin
if (Ekind (E) = E_Constant or else Ekind (E) = E_Variable)
and then Present (Size_Check_Code (E))
then
Remove (Size_Check_Code (E));
Set_Size_Check_Code (E, Empty);
end if;
end Kill_Size_Check_Code;
function New_External_Entity
(Kind : Entity_Kind;
Scope_Id : Entity_Id;
Sloc_Value : Source_Ptr;
Related_Id : Entity_Id;
Suffix : Character;
Suffix_Index : Nat := 0;
Prefix : Character := ' ') return Entity_Id
is
N : constant Entity_Id :=
Make_Defining_Identifier (Sloc_Value,
New_External_Name
(Chars (Related_Id), Suffix, Suffix_Index, Prefix));
begin
Set_Ekind (N, Kind);
Set_Is_Internal (N, True);
Append_Entity (N, Scope_Id);
Set_Public_Status (N);
if Kind in Type_Kind then
Init_Size_Align (N);
end if;
return N;
end New_External_Entity;
function New_Internal_Entity
(Kind : Entity_Kind;
Scope_Id : Entity_Id;
Sloc_Value : Source_Ptr;
Id_Char : Character) return Entity_Id
is
N : constant Entity_Id :=
Make_Defining_Identifier (Sloc_Value, New_Internal_Name (Id_Char));
begin
Set_Ekind (N, Kind);
Set_Is_Internal (N, True);
Append_Entity (N, Scope_Id);
if Kind in Type_Kind then
Init_Size_Align (N);
end if;
return N;
end New_Internal_Entity;
function Next_Actual (Actual_Id : Node_Id) return Node_Id is
N : Node_Id;
begin
if Is_List_Member (Actual_Id) then
N := Next (Actual_Id);
if Nkind (N) = N_Parameter_Association then
return First_Named_Actual (Parent (Actual_Id));
else
return N;
end if;
else
return Next_Named_Actual (Parent (Actual_Id));
end if;
end Next_Actual;
procedure Next_Actual (Actual_Id : in out Node_Id) is
begin
Actual_Id := Next_Actual (Actual_Id);
end Next_Actual;
procedure Normalize_Actuals
(N : Node_Id;
S : Entity_Id;
Report : Boolean;
Success : out Boolean)
is
Actuals : constant List_Id := Parameter_Associations (N);
Actual : Node_Id := Empty;
Formal : Entity_Id;
Last : Node_Id := Empty;
First_Named : Node_Id := Empty;
Found : Boolean;
Formals_To_Match : Integer := 0;
Actuals_To_Match : Integer := 0;
procedure Chain (A : Node_Id);
function Reporting return Boolean;
procedure Chain (A : Node_Id) is
begin
if No (Last) then
Set_First_Named_Actual (N, Explicit_Actual_Parameter (A));
else
Set_Next_Named_Actual (Last, Explicit_Actual_Parameter (A));
end if;
Last := A;
Set_Next_Named_Actual (Last, Empty);
end Chain;
function Reporting return Boolean is
begin
if not Report then
return False;
elsif not Within_Init_Proc then
return True;
elsif Is_Init_Proc (Entity (Name (N))) then
return False;
else
return True;
end if;
end Reporting;
begin
if Is_Access_Type (S) then
Formal := First_Formal (Designated_Type (S));
else
Formal := First_Formal (S);
end if;
while Present (Formal) loop
Formals_To_Match := Formals_To_Match + 1;
Next_Formal (Formal);
end loop;
if Present (Actuals) then
Actual := First (Actuals);
end if;
while Present (Actual)
and then Nkind (Actual) /= N_Parameter_Association
loop
Actuals_To_Match := Actuals_To_Match + 1;
Next (Actual);
end loop;
if No (Actual) and Actuals_To_Match = Formals_To_Match then
Success := True;
return;
elsif Actuals_To_Match > Formals_To_Match then
if Reporting then
if Is_Entity_Name (Name (N)) then
Error_Msg_N ("too many arguments in call to&", Name (N));
else
Error_Msg_N ("too many arguments in call", N);
end if;
end if;
Success := False;
return;
end if;
First_Named := Actual;
while Present (Actual) loop
if Nkind (Actual) /= N_Parameter_Association then
Error_Msg_N
("positional parameters not allowed after named ones", Actual);
Success := False;
return;
else
Actuals_To_Match := Actuals_To_Match + 1;
end if;
Next (Actual);
end loop;
if Present (Actuals) then
Actual := First (Actuals);
end if;
Formal := First_Formal (S);
while Present (Formal) loop
if Present (Actual)
and then Nkind (Actual) /= N_Parameter_Association
then
Next (Actual);
Actuals_To_Match := Actuals_To_Match - 1;
Formals_To_Match := Formals_To_Match - 1;
else
Actual := First_Named;
Found := False;
while Present (Actual) loop
if Chars (Selector_Name (Actual)) = Chars (Formal) then
Found := True;
Chain (Actual);
Actuals_To_Match := Actuals_To_Match - 1;
Formals_To_Match := Formals_To_Match - 1;
exit;
end if;
Next (Actual);
end loop;
if not Found then
if Ekind (Formal) /= E_In_Parameter
or else No (Default_Value (Formal))
then
if Reporting then
if (Comes_From_Source (S)
or else Sloc (S) = Standard_Location)
and then Is_Overloadable (S)
then
if No (Actuals)
and then
(Nkind (Parent (N)) = N_Procedure_Call_Statement
or else
(Nkind (Parent (N)) = N_Function_Call
or else
Nkind (Parent (N)) = N_Parameter_Association))
and then Ekind (S) /= E_Function
then
Set_Etype (N, Etype (S));
else
Error_Msg_Name_1 := Chars (S);
Error_Msg_Sloc := Sloc (S);
Error_Msg_NE
("missing argument for parameter & " &
"in call to % declared #", N, Formal);
end if;
elsif Is_Overloadable (S) then
Error_Msg_Name_1 := Chars (S);
Error_Msg_Sloc := Sloc (Parent (S));
Error_Msg_NE
("missing argument for parameter & " &
"in call to % (inherited) #", N, Formal);
else
Error_Msg_NE
("missing argument for parameter &", N, Formal);
end if;
end if;
Success := False;
return;
else
Formals_To_Match := Formals_To_Match - 1;
end if;
end if;
end if;
Next_Formal (Formal);
end loop;
if Formals_To_Match = 0 and then Actuals_To_Match = 0 then
Success := True;
return;
else
if Reporting then
Actual := First (Actuals);
while Present (Actual) loop
if Nkind (Actual) = N_Parameter_Association
and then Actual /= Last
and then No (Next_Named_Actual (Actual))
then
Error_Msg_N ("unmatched actual & in call",
Selector_Name (Actual));
exit;
end if;
Next (Actual);
end loop;
end if;
Success := False;
return;
end if;
end Normalize_Actuals;
procedure Note_Possible_Modification (N : Node_Id) is
Modification_Comes_From_Source : constant Boolean :=
Comes_From_Source (Parent (N));
Ent : Entity_Id;
Exp : Node_Id;
begin
Exp := N;
loop
<<Continue>>
Ent := Empty;
if Is_Entity_Name (Exp) then
Ent := Entity (Exp);
elsif Nkind (Exp) = N_Explicit_Dereference then
declare
P : constant Node_Id := Prefix (Exp);
begin
if Nkind (P) = N_Selected_Component
and then Present (
Entry_Formal (Entity (Selector_Name (P))))
then
Ent := Entry_Formal (Entity (Selector_Name (P)));
elsif Nkind (P) = N_Identifier
and then Nkind (Parent (Entity (P))) = N_Object_Declaration
and then Present (Expression (Parent (Entity (P))))
and then Nkind (Expression (Parent (Entity (P))))
= N_Reference
then
Exp := Prefix (Expression (Parent (Entity (P))));
else
return;
end if;
end;
elsif Nkind (Exp) = N_Type_Conversion
or else Nkind (Exp) = N_Unchecked_Type_Conversion
then
Exp := Expression (Exp);
elsif Nkind (Exp) = N_Slice
or else Nkind (Exp) = N_Indexed_Component
or else Nkind (Exp) = N_Selected_Component
then
Exp := Prefix (Exp);
else
return;
end if;
if Present (Ent) then
if Is_Object (Ent) then
if Comes_From_Source (Exp)
or else Modification_Comes_From_Source
then
Set_Never_Set_In_Source (Ent, False);
end if;
Set_Is_True_Constant (Ent, False);
Set_Current_Value (Ent, Empty);
if not Can_Never_Be_Null (Ent) then
Set_Is_Known_Non_Null (Ent, False);
end if;
if (Ekind (Ent) = E_Variable or else Ekind (Ent) = E_Constant)
and then Present (Renamed_Object (Ent))
then
Exp := Renamed_Object (Ent);
goto Continue;
end if;
if Modification_Comes_From_Source then
Generate_Reference (Ent, Exp, 'm');
end if;
end if;
Kill_Checks (Ent);
return;
end if;
end loop;
end Note_Possible_Modification;
function Object_Access_Level (Obj : Node_Id) return Uint is
E : Entity_Id;
begin
if Is_Entity_Name (Obj) then
E := Entity (Obj);
if Is_Type (E) then
return Type_Access_Level (E) + 1;
elsif Present (Renamed_Object (E)) then
return Object_Access_Level (Renamed_Object (E));
elsif not Is_Overloadable (E)
and then Ekind (Scope (E)) = E_Protected_Type
and then Comes_From_Source (Scope (E))
then
return Type_Access_Level (Scope (E)) + 1;
else
return Scope_Depth (Enclosing_Dynamic_Scope (E));
end if;
elsif Nkind (Obj) = N_Selected_Component then
if Is_Access_Type (Etype (Prefix (Obj))) then
return Type_Access_Level (Etype (Prefix (Obj)));
else
return Object_Access_Level (Prefix (Obj));
end if;
elsif Nkind (Obj) = N_Indexed_Component then
if Is_Access_Type (Etype (Prefix (Obj))) then
return Type_Access_Level (Etype (Prefix (Obj)));
else
return Object_Access_Level (Prefix (Obj));
end if;
elsif Nkind (Obj) = N_Explicit_Dereference then
if Nkind (Prefix (Obj)) = N_Selected_Component
and then Ekind (Etype (Prefix (Obj))) = E_Anonymous_Access_Type
and then
Ekind (Entity (Selector_Name (Prefix (Obj)))) = E_Discriminant
then
return Object_Access_Level (Prefix (Obj));
else
return Type_Access_Level (Etype (Prefix (Obj)));
end if;
elsif Nkind (Obj) = N_Type_Conversion
or else Nkind (Obj) = N_Unchecked_Type_Conversion
then
return Object_Access_Level (Expression (Obj));
elsif Nkind (Obj) = N_Function_Call then
if Is_Entity_Name (Name (Obj)) then
return Subprogram_Access_Level (Entity (Name (Obj)));
else
return Type_Access_Level (Etype (Prefix (Name (Obj))));
end if;
elsif Nkind (Obj) = N_Qualified_Expression then
return Object_Access_Level (Expression (Obj));
else
return Scope_Depth (Standard_Standard);
end if;
end Object_Access_Level;
function Private_Component (Type_Id : Entity_Id) return Entity_Id is
Ancestor : constant Entity_Id := Base_Type (Type_Id);
function Trace_Components
(T : Entity_Id;
Check : Boolean) return Entity_Id;
function Trace_Components
(T : Entity_Id;
Check : Boolean) return Entity_Id
is
Btype : constant Entity_Id := Base_Type (T);
Component : Entity_Id;
P : Entity_Id;
Candidate : Entity_Id := Empty;
begin
if Check and then Btype = Ancestor then
Error_Msg_N ("circular type definition", Type_Id);
return Any_Type;
end if;
if Is_Private_Type (Btype)
and then not Is_Generic_Type (Btype)
then
if Present (Full_View (Btype))
and then Is_Record_Type (Full_View (Btype))
and then not Is_Frozen (Btype)
then
Candidate := Trace_Components (Full_View (Btype), True);
if Candidate = Any_Type then
return Any_Type;
else
return Btype;
end if;
else
return Btype;
end if;
elsif Is_Array_Type (Btype) then
return Trace_Components (Component_Type (Btype), True);
elsif Is_Record_Type (Btype) then
Component := First_Entity (Btype);
while Present (Component) loop
if not Is_Type (Component) then
P := Trace_Components (Etype (Component), True);
if Present (P) then
if P = Any_Type then
return P;
else
Candidate := P;
end if;
end if;
end if;
Next_Entity (Component);
end loop;
return Candidate;
else
return Empty;
end if;
end Trace_Components;
begin
return Trace_Components (Type_Id, False);
end Private_Component;
procedure Process_End_Label
(N : Node_Id;
Typ : Character;
Ent : Entity_Id)
is
Loc : Source_Ptr;
Nam : Node_Id;
Label_Ref : Boolean;
Endl : Node_Id;
procedure Generate_Parent_Ref (N : Node_Id);
procedure Generate_Parent_Ref (N : Node_Id) is
Parent_Ent : Entity_Id;
begin
Parent_Ent := Current_Scope;
while Present (Parent_Ent) loop
if Chars (Parent_Ent) = Chars (N) then
Generate_Reference
(Parent_Ent, N, 'r', Set_Ref => False, Force => True);
Style.Check_Identifier (N, Parent_Ent);
return;
end if;
Parent_Ent := Scope (Parent_Ent);
end loop;
return;
end Generate_Parent_Ref;
begin
if No (N) then
return;
end if;
Endl := End_Label (N);
if No (Endl) or else Nkind (Endl) = N_String_Literal then
return;
end if;
if not In_Extended_Main_Source_Unit (N) then
if Typ /= 'e' then
return;
else
Label_Ref := False;
if Nkind (Endl) = N_Designator then
Endl := Identifier (Endl);
end if;
end if;
else
Label_Ref := True;
if Nkind (Endl) = N_Designator then
if Comes_From_Source (Endl) then
Nam := Name (Endl);
while Nkind (Nam) = N_Selected_Component loop
Generate_Parent_Ref (Selector_Name (Nam));
Nam := Prefix (Nam);
end loop;
Generate_Parent_Ref (Nam);
end if;
Endl := Identifier (Endl);
end if;
end if;
if Chars (Ent) /= Chars (Endl) then
return;
end if;
Loc := Sloc (Endl);
if Comes_From_Source (Endl) then
if Label_Ref then
if Style_Check then
Style.Check_Identifier (Endl, Ent);
end if;
Generate_Reference (Ent, Endl, 'l', Set_Ref => False);
end if;
Get_Decoded_Name_String (Chars (Endl));
Set_Sloc (Endl, Sloc (Endl) + Source_Ptr (Name_Len));
end if;
Generate_Reference (Ent, Endl, Typ, Set_Ref => False, Force => True);
Set_Sloc (Endl, Loc);
end Process_End_Label;
function Real_Convert (S : String) return Node_Id is
Save_Src : constant Source_Buffer_Ptr := Source;
Negative : Boolean;
begin
Source := Internal_Source_Ptr;
Scan_Ptr := 1;
for J in S'Range loop
Source (Source_Ptr (J)) := S (J);
end loop;
Source (S'Length + 1) := EOF;
if Source (Scan_Ptr) = '-' then
Negative := True;
Scan_Ptr := Scan_Ptr + 1;
else
Negative := False;
end if;
Scan;
if Negative then
Set_Realval (Token_Node, UR_Negate (Realval (Token_Node)));
end if;
Source := Save_Src;
return Token_Node;
end Real_Convert;
function Rep_To_Pos_Flag (E : Entity_Id; Loc : Source_Ptr) return Node_Id is
begin
return New_Occurrence_Of
(Boolean_Literals (not Range_Checks_Suppressed (E)), Loc);
end Rep_To_Pos_Flag;
procedure Require_Entity (N : Node_Id) is
begin
if Is_Entity_Name (N) and then No (Entity (N)) then
if Total_Errors_Detected /= 0 then
Set_Entity (N, Any_Id);
else
raise Program_Error;
end if;
end if;
end Require_Entity;
function Requires_Transient_Scope (Id : Entity_Id) return Boolean is
Typ : constant Entity_Id := Underlying_Type (Id);
begin
if No (Typ) then
return False;
elsif Typ = Standard_Void_Type then
return False;
elsif Is_Elementary_Type (Typ) then
return False;
elsif Is_Indefinite_Subtype (Typ) then
return True;
elsif Is_Tagged_Type (Typ)
or else Has_Controlled_Component (Typ)
then
return True;
elsif Is_Record_Type (Typ) then
if Opt.GCC_Version = 2
and then Has_Discriminants (Typ)
then
return True;
else
declare
Comp : Entity_Id;
begin
Comp := First_Entity (Typ);
while Present (Comp) loop
if Requires_Transient_Scope (Etype (Comp)) then
return True;
else
Next_Entity (Comp);
end if;
end loop;
end;
return False;
end if;
elsif Ekind (Typ) = E_String_Literal_Subtype then
return False;
elsif Is_Array_Type (Typ) then
if Requires_Transient_Scope (Component_Type (Typ)) then
return True;
else
return not Size_Known_At_Compile_Time (Typ);
end if;
else
return False;
end if;
end Requires_Transient_Scope;
procedure Reset_Analyzed_Flags (N : Node_Id) is
function Clear_Analyzed
(N : Node_Id) return Traverse_Result;
function Clear_Analyzed
(N : Node_Id) return Traverse_Result
is
begin
if not Has_Extension (N) then
Set_Analyzed (N, False);
end if;
return OK;
end Clear_Analyzed;
function Reset_Analyzed is
new Traverse_Func (Clear_Analyzed);
Discard : Traverse_Result;
pragma Warnings (Off, Discard);
begin
Discard := Reset_Analyzed (N);
end Reset_Analyzed_Flags;
function Safe_To_Capture_Value
(N : Node_Id;
Ent : Entity_Id) return Boolean
is
begin
if Ekind (Ent) /= E_Variable
and then
Ekind (Ent) /= E_Out_Parameter
and then
Ekind (Ent) /= E_In_Out_Parameter
then
return False;
end if;
if Treat_As_Volatile (Ent) or else Is_Aliased (Ent) then
return False;
end if;
declare
E_Scope : constant Entity_Id := Scope (Ent);
R_Scope : Entity_Id;
begin
R_Scope := Current_Scope;
while R_Scope /= Standard_Standard loop
exit when R_Scope = E_Scope;
if Ekind (R_Scope) /= E_Package
and then
Ekind (R_Scope) /= E_Block
then
return False;
else
R_Scope := Scope (R_Scope);
end if;
end loop;
end;
declare
P : Node_Id;
begin
P := Parent (N);
while Present (P) loop
if Nkind (P) = N_If_Statement
or else
Nkind (P) = N_Case_Statement
or else
Nkind (P) = N_Exception_Handler
or else
Nkind (P) = N_Selective_Accept
or else
Nkind (P) = N_Conditional_Entry_Call
or else
Nkind (P) = N_Timed_Entry_Call
or else
Nkind (P) = N_Asynchronous_Select
then
return False;
else
P := Parent (P);
end if;
end loop;
end;
return True;
end Safe_To_Capture_Value;
function Same_Name (N1, N2 : Node_Id) return Boolean is
K1 : constant Node_Kind := Nkind (N1);
K2 : constant Node_Kind := Nkind (N2);
begin
if (K1 = N_Identifier or else K1 = N_Defining_Identifier)
and then (K2 = N_Identifier or else K2 = N_Defining_Identifier)
then
return Chars (N1) = Chars (N2);
elsif (K1 = N_Selected_Component or else K1 = N_Expanded_Name)
and then (K2 = N_Selected_Component or else K2 = N_Expanded_Name)
then
return Same_Name (Selector_Name (N1), Selector_Name (N2))
and then Same_Name (Prefix (N1), Prefix (N2));
else
return False;
end if;
end Same_Name;
function Same_Type (T1, T2 : Entity_Id) return Boolean is
begin
if T1 = T2 then
return True;
elsif not Is_Constrained (T1)
and then not Is_Constrained (T2)
and then Base_Type (T1) = Base_Type (T2)
then
return True;
else
return False;
end if;
end Same_Type;
function Scope_Is_Transient return Boolean is
begin
return Scope_Stack.Table (Scope_Stack.Last).Is_Transient;
end Scope_Is_Transient;
function Scope_Within (Scope1, Scope2 : Entity_Id) return Boolean is
Scop : Entity_Id;
begin
Scop := Scope1;
while Scop /= Standard_Standard loop
Scop := Scope (Scop);
if Scop = Scope2 then
return True;
end if;
end loop;
return False;
end Scope_Within;
function Scope_Within_Or_Same (Scope1, Scope2 : Entity_Id) return Boolean is
Scop : Entity_Id;
begin
Scop := Scope1;
while Scop /= Standard_Standard loop
if Scop = Scope2 then
return True;
else
Scop := Scope (Scop);
end if;
end loop;
return False;
end Scope_Within_Or_Same;
procedure Set_Current_Entity (E : Entity_Id) is
begin
Set_Name_Entity_Id (Chars (E), E);
end Set_Current_Entity;
procedure Set_Entity_With_Style_Check (N : Node_Id; Val : Entity_Id) is
Val_Actual : Entity_Id;
Nod : Node_Id;
begin
Set_Entity (N, Val);
if Style_Check
and then not Suppress_Style_Checks (Val)
and then not In_Instance
then
if Nkind (N) = N_Identifier then
Nod := N;
elsif Nkind (N) = N_Expanded_Name then
Nod := Selector_Name (N);
else
return;
end if;
Val_Actual := Val;
while not Comes_From_Source (Val_Actual)
and then Nkind (Val_Actual) in N_Entity
and then (Ekind (Val_Actual) = E_Enumeration_Literal
or else Is_Subprogram (Val_Actual)
or else Is_Generic_Subprogram (Val_Actual))
and then Present (Alias (Val_Actual))
loop
Val_Actual := Alias (Val_Actual);
end loop;
if Chars (Nod) = Chars (Val_Actual) then
Style.Check_Identifier (Nod, Val_Actual);
end if;
end if;
Set_Entity (N, Val);
end Set_Entity_With_Style_Check;
procedure Set_Name_Entity_Id (Id : Name_Id; Val : Entity_Id) is
begin
Set_Name_Table_Info (Id, Int (Val));
end Set_Name_Entity_Id;
procedure Set_Next_Actual (Ass1_Id : Node_Id; Ass2_Id : Node_Id) is
begin
if Nkind (Parent (Ass1_Id)) = N_Parameter_Association then
Set_First_Named_Actual (Parent (Ass1_Id), Ass2_Id);
end if;
end Set_Next_Actual;
procedure Set_Public_Status (Id : Entity_Id) is
S : constant Entity_Id := Current_Scope;
begin
if S = Standard_Standard
or else (Is_Public (S)
and then (Ekind (S) = E_Package
or else Is_Record_Type (S)
or else Ekind (S) = E_Void))
then
Set_Is_Public (Id);
elsif Is_Public (S)
and then Is_Concurrent_Type (S)
and then not Has_Completion (S)
and then Nkind (Parent (Id)) = N_Object_Declaration
then
Set_Is_Public (Id);
end if;
end Set_Public_Status;
procedure Set_Scope_Is_Transient (V : Boolean := True) is
begin
Scope_Stack.Table (Scope_Stack.Last).Is_Transient := V;
end Set_Scope_Is_Transient;
procedure Set_Size_Info (T1, T2 : Entity_Id) is
begin
Set_Esize (T1, Esize (T2));
Set_Has_Biased_Representation (T1, Has_Biased_Representation (T2));
if Is_Discrete_Or_Fixed_Point_Type (T1)
and then
Is_Discrete_Or_Fixed_Point_Type (T2)
then
Set_Is_Unsigned_Type (T1, Is_Unsigned_Type (T2));
end if;
Set_Alignment (T1, Alignment (T2));
end Set_Size_Info;
function Static_Integer (N : Node_Id) return Uint is
begin
Analyze_And_Resolve (N, Any_Integer);
if N = Error
or else Error_Posted (N)
or else Etype (N) = Any_Type
then
return No_Uint;
end if;
if Is_Static_Expression (N) then
if not Raises_Constraint_Error (N) then
return Expr_Value (N);
else
return No_Uint;
end if;
elsif Etype (N) = Any_Type then
return No_Uint;
else
Flag_Non_Static_Expr
("static integer expression required here", N);
return No_Uint;
end if;
end Static_Integer;
function Statically_Different (E1, E2 : Node_Id) return Boolean is
R1 : constant Node_Id := Get_Referenced_Object (E1);
R2 : constant Node_Id := Get_Referenced_Object (E2);
begin
return Is_Entity_Name (R1)
and then Is_Entity_Name (R2)
and then Entity (R1) /= Entity (R2)
and then not Is_Formal (Entity (R1))
and then not Is_Formal (Entity (R2));
end Statically_Different;
function Subprogram_Access_Level (Subp : Entity_Id) return Uint is
begin
if Present (Alias (Subp)) then
return Subprogram_Access_Level (Alias (Subp));
else
return Scope_Depth (Enclosing_Dynamic_Scope (Subp));
end if;
end Subprogram_Access_Level;
procedure Trace_Scope (N : Node_Id; E : Entity_Id; Msg : String) is
begin
if Debug_Flag_W then
for J in 0 .. Scope_Stack.Last loop
Write_Str (" ");
end loop;
Write_Str (Msg);
Write_Name (Chars (E));
Write_Str (" line ");
Write_Int (Int (Get_Logical_Line_Number (Sloc (N))));
Write_Eol;
end if;
end Trace_Scope;
procedure Transfer_Entities (From : Entity_Id; To : Entity_Id) is
Ent : Entity_Id := First_Entity (From);
begin
if No (Ent) then
return;
end if;
if (Last_Entity (To)) = Empty then
Set_First_Entity (To, Ent);
else
Set_Next_Entity (Last_Entity (To), Ent);
end if;
Set_Last_Entity (To, Last_Entity (From));
while Present (Ent) loop
Set_Scope (Ent, To);
if not Is_Public (Ent) then
Set_Public_Status (Ent);
if Is_Public (Ent)
and then Ekind (Ent) = E_Record_Subtype
then
declare
Comp : Entity_Id;
begin
Comp := First_Entity (Ent);
while Present (Comp) loop
Set_Is_Public (Comp);
Next_Entity (Comp);
end loop;
end;
end if;
end if;
Next_Entity (Ent);
end loop;
Set_First_Entity (From, Empty);
Set_Last_Entity (From, Empty);
end Transfer_Entities;
function Type_Access_Level (Typ : Entity_Id) return Uint is
Btyp : Entity_Id;
begin
Btyp := Base_Type (Typ);
if Ekind (Btyp) in Access_Kind then
if Ekind (Btyp) = E_Anonymous_Access_Type
and then not Is_Array_Type (Scope (Btyp)) and then Ekind (Scope (Btyp)) /= E_Record_Type then
return Scope_Depth (Standard_Standard);
end if;
Btyp := Root_Type (Btyp);
end if;
return Scope_Depth (Enclosing_Dynamic_Scope (Btyp));
end Type_Access_Level;
function Unit_Declaration_Node (Unit_Id : Entity_Id) return Node_Id is
N : Node_Id := Parent (Unit_Id);
begin
if Ekind (Unit_Id) = E_Operator then
return N;
end if;
while Nkind (N) /= N_Abstract_Subprogram_Declaration
and then Nkind (N) /= N_Formal_Package_Declaration
and then Nkind (N) /= N_Function_Instantiation
and then Nkind (N) /= N_Generic_Package_Declaration
and then Nkind (N) /= N_Generic_Subprogram_Declaration
and then Nkind (N) /= N_Package_Declaration
and then Nkind (N) /= N_Package_Body
and then Nkind (N) /= N_Package_Instantiation
and then Nkind (N) /= N_Package_Renaming_Declaration
and then Nkind (N) /= N_Procedure_Instantiation
and then Nkind (N) /= N_Protected_Body
and then Nkind (N) /= N_Subprogram_Declaration
and then Nkind (N) /= N_Subprogram_Body
and then Nkind (N) /= N_Subprogram_Body_Stub
and then Nkind (N) /= N_Subprogram_Renaming_Declaration
and then Nkind (N) /= N_Task_Body
and then Nkind (N) /= N_Task_Type_Declaration
and then Nkind (N) not in N_Formal_Subprogram_Declaration
and then Nkind (N) not in N_Generic_Renaming_Declaration
loop
N := Parent (N);
pragma Assert (Present (N));
end loop;
return N;
end Unit_Declaration_Node;
function Universal_Interpretation (Opnd : Node_Id) return Entity_Id is
Index : Interp_Index;
It : Interp;
begin
if Nkind (Opnd) = N_Defining_Identifier
or else not Is_Overloaded (Opnd)
then
if Etype (Opnd) = Universal_Integer
or else Etype (Opnd) = Universal_Real
then
return Etype (Opnd);
else
return Empty;
end if;
else
Get_First_Interp (Opnd, Index, It);
while Present (It.Typ) loop
if It.Typ = Universal_Integer
or else It.Typ = Universal_Real
then
return It.Typ;
end if;
Get_Next_Interp (Index, It);
end loop;
return Empty;
end if;
end Universal_Interpretation;
function Within_Init_Proc return Boolean is
S : Entity_Id;
begin
S := Current_Scope;
while not Is_Overloadable (S) loop
if S = Standard_Standard then
return False;
else
S := Scope (S);
end if;
end loop;
return Is_Init_Proc (S);
end Within_Init_Proc;
procedure Wrong_Type (Expr : Node_Id; Expected_Type : Entity_Id) is
Found_Type : constant Entity_Id := First_Subtype (Etype (Expr));
Expec_Type : constant Entity_Id := First_Subtype (Expected_Type);
function Has_One_Matching_Field return Boolean;
function Has_One_Matching_Field return Boolean is
E : Entity_Id;
begin
if Is_Array_Type (Expec_Type)
and then Number_Dimensions (Expec_Type) = 1
and then
Covers (Etype (Component_Type (Expec_Type)), Found_Type)
then
return True;
elsif not Is_Record_Type (Expec_Type) then
return False;
else
E := First_Entity (Expec_Type);
loop
if No (E) then
return False;
elsif (Ekind (E) /= E_Discriminant
and then Ekind (E) /= E_Component)
or else (Chars (E) = Name_uTag
or else Chars (E) = Name_uParent)
then
Next_Entity (E);
else
exit;
end if;
end loop;
if not Covers (Etype (E), Found_Type) then
return False;
elsif Present (Next_Entity (E)) then
return False;
else
return True;
end if;
end if;
end Has_One_Matching_Field;
begin
if Expec_Type = Any_Type
or else Found_Type = Any_Type
or else Error_Posted (Expr)
then
return;
elsif In_Instance then
if Etype (Etype (Expr)) = Etype (Expected_Type)
and then
(Has_Private_Declaration (Expected_Type)
or else Has_Private_Declaration (Etype (Expr)))
and then No (Parent (Expected_Type))
then
return;
end if;
end if;
if Nkind (Expr) in N_Subexpr
and then Paren_Count (Expr) /= 0
and then Has_One_Matching_Field
then
Error_Msg_N ("positional aggregate cannot have one component", Expr);
elsif Is_Access_Type (Expec_Type)
and then Ekind (Found_Type) = E_Access_Attribute_Type
and then Ekind (Base_Type (Expec_Type)) /= E_General_Access_Type
and then Ekind (Base_Type (Expec_Type)) /= E_Anonymous_Access_Type
and then Covers
(Designated_Type (Expec_Type), Designated_Type (Found_Type))
then
Error_Msg_N ("result must be general access type!", Expr);
Error_Msg_NE ("add ALL to }!", Expr, Expec_Type);
elsif Ekind (Expec_Type) = E_Anonymous_Access_Type then
if Comes_From_Source (Expec_Type) then
Error_Msg_NE ("expected}!", Expr, Expec_Type);
else
Error_Msg_NE
("expected an access type with designated}",
Expr, Designated_Type (Expec_Type));
end if;
if Is_Access_Type (Found_Type)
and then not Comes_From_Source (Found_Type)
then
Error_Msg_NE
("found an access type with designated}!",
Expr, Designated_Type (Found_Type));
else
if From_With_Type (Found_Type) then
Error_Msg_NE ("found incomplete}!", Expr, Found_Type);
Error_Msg_NE
("\possibly missing with_clause on&", Expr,
Scope (Found_Type));
else
Error_Msg_NE ("found}!", Expr, Found_Type);
end if;
end if;
else
declare
Expec_Scope : Entity_Id;
Found_Scope : Entity_Id;
begin
Expec_Scope := Expec_Type;
Found_Scope := Found_Type;
for Levels in Int range 0 .. 3 loop
if Chars (Expec_Scope) /= Chars (Found_Scope) then
Error_Msg_Qual_Level := Levels;
exit;
end if;
Expec_Scope := Scope (Expec_Scope);
Found_Scope := Scope (Found_Scope);
exit when Expec_Scope = Standard_Standard
or else
Found_Scope = Standard_Standard
or else
not Comes_From_Source (Expec_Scope)
or else
not Comes_From_Source (Found_Scope);
end loop;
end;
Error_Msg_NE ("expected}!", Expr, Expec_Type);
if Is_Entity_Name (Expr)
and then Is_Package (Entity (Expr))
then
Error_Msg_N ("found package name!", Expr);
elsif Is_Entity_Name (Expr)
and then
(Ekind (Entity (Expr)) = E_Procedure
or else
Ekind (Entity (Expr)) = E_Generic_Procedure)
then
if Ekind (Expec_Type) = E_Access_Subprogram_Type then
Error_Msg_N
("found procedure name, possibly missing Access attribute!",
Expr);
else
Error_Msg_N ("found procedure name instead of function!", Expr);
end if;
elsif Nkind (Expr) = N_Function_Call
and then Ekind (Expec_Type) = E_Access_Subprogram_Type
and then Etype (Designated_Type (Expec_Type)) = Etype (Expr)
and then No (Parameter_Associations (Expr))
then
Error_Msg_N
("found function name, possibly missing Access attribute!",
Expr);
elsif Nkind (Expr) in N_Op
and then Is_Overloaded (Expr)
and then not Is_Immediately_Visible (Expec_Type)
and then not Is_Potentially_Use_Visible (Expec_Type)
and then not In_Use (Expec_Type)
and then Has_Compatible_Type (Right_Opnd (Expr), Expec_Type)
then
Error_Msg_N (
"operator of the type is not directly visible!", Expr);
elsif Ekind (Found_Type) = E_Void
and then Present (Parent (Found_Type))
and then Nkind (Parent (Found_Type)) = N_Full_Type_Declaration
then
Error_Msg_NE ("found premature usage of}!", Expr, Found_Type);
else
Error_Msg_NE ("found}!", Expr, Found_Type);
end if;
Error_Msg_Qual_Level := 0;
end if;
end Wrong_Type;
end Sem_Util;