-- --
-- B o d y --
-- --
--- Copyright (C) 2010-2011, Free Software Foundation, Inc. --
+-- Copyright (C) 2010-2019, Free Software Foundation, Inc. --
-- --
-- GNAT is free software; you can redistribute it and/or modify it under --
-- terms of the GNU General Public License as published by the Free Soft- --
with Sinfo; use Sinfo;
with Tree_IO; use Tree_IO;
-with GNAT.HTable; use GNAT.HTable;
+with GNAT.HTable;
package body Aspects is
+ -- The following array indicates aspects that a subtype inherits from its
+ -- base type. True means that the subtype inherits the aspect from its base
+ -- type. False means it is not inherited.
+
+ Base_Aspect : constant array (Aspect_Id) of Boolean :=
+ (Aspect_Atomic => True,
+ Aspect_Atomic_Components => True,
+ Aspect_Constant_Indexing => True,
+ Aspect_Default_Iterator => True,
+ Aspect_Discard_Names => True,
+ Aspect_Independent_Components => True,
+ Aspect_Iterator_Element => True,
+ Aspect_Type_Invariant => True,
+ Aspect_Unchecked_Union => True,
+ Aspect_Variable_Indexing => True,
+ Aspect_Volatile => True,
+ Aspect_Volatile_Full_Access => True,
+ others => False);
+
+ -- The following array indicates type aspects that are inherited and apply
+ -- to the class-wide type as well.
+
+ Inherited_Aspect : constant array (Aspect_Id) of Boolean :=
+ (Aspect_Constant_Indexing => True,
+ Aspect_Default_Iterator => True,
+ Aspect_Implicit_Dereference => True,
+ Aspect_Iterator_Element => True,
+ Aspect_Remote_Types => True,
+ Aspect_Variable_Indexing => True,
+ others => False);
+
procedure Set_Aspect_Specifications_No_Check (N : Node_Id; L : List_Id);
-- Same as Set_Aspect_Specifications, but does not contain the assertion
-- that checks that N does not already have aspect specifications. This
end if;
end Aspect_Specifications;
- -------------------
- -- Get_Aspect_Id --
- -------------------
+ --------------------------------
+ -- Aspects_On_Body_Or_Stub_OK --
+ --------------------------------
+
+ function Aspects_On_Body_Or_Stub_OK (N : Node_Id) return Boolean is
+ Aspect : Node_Id;
+ Aspects : List_Id;
- function Get_Aspect_Id (Name : Name_Id) return Aspect_Id is
begin
- return Aspect_Id_Hash_Table.Get (Name);
- end Get_Aspect_Id;
+ -- The routine should be invoked on a body [stub] with aspects
+
+ pragma Assert (Has_Aspects (N));
+ pragma Assert (Nkind (N) in N_Body_Stub
+ or else Nkind_In (N, N_Entry_Body,
+ N_Package_Body,
+ N_Protected_Body,
+ N_Subprogram_Body,
+ N_Task_Body));
+
+ -- Look through all aspects and see whether they can be applied to a
+ -- body [stub].
+
+ Aspects := Aspect_Specifications (N);
+ Aspect := First (Aspects);
+ while Present (Aspect) loop
+ if not Aspect_On_Body_Or_Stub_OK (Get_Aspect_Id (Aspect)) then
+ return False;
+ end if;
+
+ Next (Aspect);
+ end loop;
+
+ return True;
+ end Aspects_On_Body_Or_Stub_OK;
+
+ ----------------------
+ -- Exchange_Aspects --
+ ----------------------
+
+ procedure Exchange_Aspects (N1 : Node_Id; N2 : Node_Id) is
+ begin
+ pragma Assert
+ (Permits_Aspect_Specifications (N1)
+ and then Permits_Aspect_Specifications (N2));
+
+ -- Perform the exchange only when both nodes have lists to be swapped
+
+ if Has_Aspects (N1) and then Has_Aspects (N2) then
+ declare
+ L1 : constant List_Id := Aspect_Specifications (N1);
+ L2 : constant List_Id := Aspect_Specifications (N2);
+ begin
+ Set_Parent (L1, N2);
+ Set_Parent (L2, N1);
+ Aspect_Specifications_Hash_Table.Set (N1, L2);
+ Aspect_Specifications_Hash_Table.Set (N2, L1);
+ end;
+ end if;
+ end Exchange_Aspects;
-----------------
-- Find_Aspect --
-----------------
- function Find_Aspect (Ent : Entity_Id; A : Aspect_Id) return Node_Id is
- Ritem : Node_Id;
+ function Find_Aspect (Id : Entity_Id; A : Aspect_Id) return Node_Id is
+ Decl : Node_Id;
+ Item : Node_Id;
+ Owner : Entity_Id;
+ Spec : Node_Id;
begin
+ Owner := Id;
- -- If the aspect is an inherited one and the entity is a class-wide
- -- type, use the aspect of the specific type.
+ -- Handle various cases of base or inherited aspects for types
- if Is_Type (Ent)
- and then Is_Class_Wide_Type (Ent)
- and then Inherited_Aspect (A)
- then
- Ritem := First_Rep_Item (Etype (Ent));
- else
- Ritem := First_Rep_Item (Ent);
+ if Is_Type (Id) then
+ if Base_Aspect (A) then
+ Owner := Base_Type (Owner);
+ end if;
+
+ if Is_Class_Wide_Type (Owner) and then Inherited_Aspect (A) then
+ Owner := Root_Type (Owner);
+ end if;
+
+ if Is_Private_Type (Owner)
+ and then Present (Full_View (Owner))
+ and then not Operational_Aspect (A)
+ then
+ Owner := Full_View (Owner);
+ end if;
end if;
- while Present (Ritem) loop
- if Nkind (Ritem) = N_Aspect_Specification
- and then Get_Aspect_Id (Chars (Identifier (Ritem))) = A
+ -- Search the representation items for the desired aspect
+
+ Item := First_Rep_Item (Owner);
+ while Present (Item) loop
+ if Nkind (Item) = N_Aspect_Specification
+ and then Get_Aspect_Id (Item) = A
then
- if A = Aspect_Default_Iterator then
- return Expression (Aspect_Rep_Item (Ritem));
- else
- return Expression (Ritem);
- end if;
+ return Item;
end if;
- Next_Rep_Item (Ritem);
+ Next_Rep_Item (Item);
end loop;
+ -- Note that not all aspects are added to the chain of representation
+ -- items. In such cases, search the list of aspect specifications. First
+ -- find the declaration node where the aspects reside. This is usually
+ -- the parent or the parent of the parent.
+
+ Decl := Parent (Owner);
+ if not Permits_Aspect_Specifications (Decl) then
+ Decl := Parent (Decl);
+ end if;
+
+ -- Search the list of aspect specifications for the desired aspect
+
+ if Permits_Aspect_Specifications (Decl) then
+ Spec := First (Aspect_Specifications (Decl));
+ while Present (Spec) loop
+ if Get_Aspect_Id (Spec) = A then
+ return Spec;
+ end if;
+
+ Next (Spec);
+ end loop;
+ end if;
+
+ -- The entity does not carry any aspects or the desired aspect was not
+ -- found.
+
return Empty;
end Find_Aspect;
+ --------------------------
+ -- Find_Value_Of_Aspect --
+ --------------------------
+
+ function Find_Value_Of_Aspect
+ (Id : Entity_Id;
+ A : Aspect_Id) return Node_Id
+ is
+ Spec : constant Node_Id := Find_Aspect (Id, A);
+
+ begin
+ if Present (Spec) then
+ if A = Aspect_Default_Iterator then
+ return Expression (Aspect_Rep_Item (Spec));
+ else
+ return Expression (Spec);
+ end if;
+ end if;
+
+ return Empty;
+ end Find_Value_Of_Aspect;
+
+ -------------------
+ -- Get_Aspect_Id --
+ -------------------
+
+ function Get_Aspect_Id (Name : Name_Id) return Aspect_Id is
+ begin
+ return Aspect_Id_Hash_Table.Get (Name);
+ end Get_Aspect_Id;
+
+ function Get_Aspect_Id (Aspect : Node_Id) return Aspect_Id is
+ begin
+ pragma Assert (Nkind (Aspect) = N_Aspect_Specification);
+ return Aspect_Id_Hash_Table.Get (Chars (Identifier (Aspect)));
+ end Get_Aspect_Id;
+
+ ----------------
+ -- Has_Aspect --
+ ----------------
+
+ function Has_Aspect (Id : Entity_Id; A : Aspect_Id) return Boolean is
+ begin
+ return Present (Find_Aspect (Id, A));
+ end Has_Aspect;
+
------------------
-- Move_Aspects --
------------------
end if;
end Move_Aspects;
+ ---------------------------
+ -- Move_Or_Merge_Aspects --
+ ---------------------------
+
+ procedure Move_Or_Merge_Aspects (From : Node_Id; To : Node_Id) is
+ procedure Relocate_Aspect (Asp : Node_Id);
+ -- Move aspect specification Asp to the aspect specifications of node To
+
+ ---------------------
+ -- Relocate_Aspect --
+ ---------------------
+
+ procedure Relocate_Aspect (Asp : Node_Id) is
+ Asps : List_Id;
+
+ begin
+ if Has_Aspects (To) then
+ Asps := Aspect_Specifications (To);
+
+ -- Create a new aspect specification list for node To
+
+ else
+ Asps := New_List;
+ Set_Aspect_Specifications (To, Asps);
+ Set_Has_Aspects (To);
+ end if;
+
+ -- Remove the aspect from its original owner and relocate it to node
+ -- To.
+
+ Remove (Asp);
+ Append (Asp, Asps);
+ end Relocate_Aspect;
+
+ -- Local variables
+
+ Asp : Node_Id;
+ Asp_Id : Aspect_Id;
+ Next_Asp : Node_Id;
+
+ -- Start of processing for Move_Or_Merge_Aspects
+
+ begin
+ if Has_Aspects (From) then
+ Asp := First (Aspect_Specifications (From));
+ while Present (Asp) loop
+
+ -- Store the next aspect now as a potential relocation will alter
+ -- the contents of the list.
+
+ Next_Asp := Next (Asp);
+
+ -- When moving or merging aspects from a subprogram body stub that
+ -- also acts as a spec, relocate only those aspects that may apply
+ -- to a body [stub]. Note that a precondition must also be moved
+ -- to the proper body as the pre/post machinery expects it to be
+ -- there.
+
+ if Nkind (From) = N_Subprogram_Body_Stub
+ and then No (Corresponding_Spec_Of_Stub (From))
+ then
+ Asp_Id := Get_Aspect_Id (Asp);
+
+ if Aspect_On_Body_Or_Stub_OK (Asp_Id)
+ or else Asp_Id = Aspect_Pre
+ or else Asp_Id = Aspect_Precondition
+ then
+ Relocate_Aspect (Asp);
+ end if;
+
+ -- When moving or merging aspects from a single concurrent type
+ -- declaration, relocate only those aspects that may apply to the
+ -- anonymous object created for the type.
+
+ -- Note: It is better to use Is_Single_Concurrent_Type_Declaration
+ -- here, but Aspects and Sem_Util have incompatible licenses.
+
+ elsif Nkind_In
+ (Original_Node (From), N_Single_Protected_Declaration,
+ N_Single_Task_Declaration)
+ then
+ Asp_Id := Get_Aspect_Id (Asp);
+
+ if Aspect_On_Anonymous_Object_OK (Asp_Id) then
+ Relocate_Aspect (Asp);
+ end if;
+
+ -- Default case - relocate the aspect to its new owner
+
+ else
+ Relocate_Aspect (Asp);
+ end if;
+
+ Asp := Next_Asp;
+ end loop;
+
+ -- The relocations may have left node From's aspect specifications
+ -- list empty. If this is the case, simply remove the aspects.
+
+ if Is_Empty_List (Aspect_Specifications (From)) then
+ Remove_Aspects (From);
+ end if;
+ end if;
+ end Move_Or_Merge_Aspects;
+
-----------------------------------
-- Permits_Aspect_Specifications --
-----------------------------------
Has_Aspect_Specifications_Flag : constant array (Node_Kind) of Boolean :=
(N_Abstract_Subprogram_Declaration => True,
N_Component_Declaration => True,
+ N_Entry_Body => True,
N_Entry_Declaration => True,
N_Exception_Declaration => True,
+ N_Exception_Renaming_Declaration => True,
+ N_Expression_Function => True,
N_Formal_Abstract_Subprogram_Declaration => True,
N_Formal_Concrete_Subprogram_Declaration => True,
N_Formal_Object_Declaration => True,
N_Full_Type_Declaration => True,
N_Function_Instantiation => True,
N_Generic_Package_Declaration => True,
+ N_Generic_Renaming_Declaration => True,
N_Generic_Subprogram_Declaration => True,
N_Object_Declaration => True,
+ N_Object_Renaming_Declaration => True,
+ N_Package_Body => True,
+ N_Package_Body_Stub => True,
N_Package_Declaration => True,
N_Package_Instantiation => True,
N_Package_Specification => True,
+ N_Package_Renaming_Declaration => True,
N_Private_Extension_Declaration => True,
N_Private_Type_Declaration => True,
N_Procedure_Instantiation => True,
N_Protected_Body => True,
+ N_Protected_Body_Stub => True,
N_Protected_Type_Declaration => True,
N_Single_Protected_Declaration => True,
N_Single_Task_Declaration => True,
N_Subprogram_Body => True,
+ N_Subprogram_Body_Stub => True,
N_Subprogram_Declaration => True,
+ N_Subprogram_Renaming_Declaration => True,
N_Subtype_Declaration => True,
N_Task_Body => True,
+ N_Task_Body_Stub => True,
N_Task_Type_Declaration => True,
others => False);
return Has_Aspect_Specifications_Flag (Nkind (N));
end Permits_Aspect_Specifications;
+ --------------------
+ -- Remove_Aspects --
+ --------------------
+
+ procedure Remove_Aspects (N : Node_Id) is
+ begin
+ if Has_Aspects (N) then
+ Aspect_Specifications_Hash_Table.Remove (N);
+ Set_Has_Aspects (N, False);
+ end if;
+ end Remove_Aspects;
+
-----------------
-- Same_Aspect --
-----------------
Canonical_Aspect : constant array (Aspect_Id) of Aspect_Id :=
(No_Aspect => No_Aspect,
- Aspect_Ada_2005 => Aspect_Ada_2005,
- Aspect_Ada_2012 => Aspect_Ada_2005,
+ Aspect_Abstract_State => Aspect_Abstract_State,
Aspect_Address => Aspect_Address,
Aspect_Alignment => Aspect_Alignment,
+ Aspect_All_Calls_Remote => Aspect_All_Calls_Remote,
+ Aspect_Annotate => Aspect_Annotate,
+ Aspect_Async_Readers => Aspect_Async_Readers,
+ Aspect_Async_Writers => Aspect_Async_Writers,
Aspect_Asynchronous => Aspect_Asynchronous,
Aspect_Atomic => Aspect_Atomic,
Aspect_Atomic_Components => Aspect_Atomic_Components,
Aspect_Attach_Handler => Aspect_Attach_Handler,
Aspect_Bit_Order => Aspect_Bit_Order,
Aspect_Component_Size => Aspect_Component_Size,
+ Aspect_Constant_After_Elaboration => Aspect_Constant_After_Elaboration,
Aspect_Constant_Indexing => Aspect_Constant_Indexing,
+ Aspect_Contract_Cases => Aspect_Contract_Cases,
+ Aspect_Convention => Aspect_Convention,
Aspect_CPU => Aspect_CPU,
Aspect_Default_Component_Value => Aspect_Default_Component_Value,
+ Aspect_Default_Initial_Condition => Aspect_Default_Initial_Condition,
Aspect_Default_Iterator => Aspect_Default_Iterator,
+ Aspect_Default_Storage_Pool => Aspect_Default_Storage_Pool,
Aspect_Default_Value => Aspect_Default_Value,
+ Aspect_Depends => Aspect_Depends,
+ Aspect_Dimension => Aspect_Dimension,
+ Aspect_Dimension_System => Aspect_Dimension_System,
+ Aspect_Disable_Controlled => Aspect_Disable_Controlled,
Aspect_Discard_Names => Aspect_Discard_Names,
Aspect_Dispatching_Domain => Aspect_Dispatching_Domain,
Aspect_Dynamic_Predicate => Aspect_Predicate,
+ Aspect_Effective_Reads => Aspect_Effective_Reads,
+ Aspect_Effective_Writes => Aspect_Effective_Writes,
+ Aspect_Elaborate_Body => Aspect_Elaborate_Body,
+ Aspect_Export => Aspect_Export,
+ Aspect_Extensions_Visible => Aspect_Extensions_Visible,
+ Aspect_External_Name => Aspect_External_Name,
Aspect_External_Tag => Aspect_External_Tag,
Aspect_Favor_Top_Level => Aspect_Favor_Top_Level,
+ Aspect_Ghost => Aspect_Ghost,
+ Aspect_Global => Aspect_Global,
Aspect_Implicit_Dereference => Aspect_Implicit_Dereference,
+ Aspect_Import => Aspect_Import,
Aspect_Independent => Aspect_Independent,
Aspect_Independent_Components => Aspect_Independent_Components,
Aspect_Inline => Aspect_Inline,
Aspect_Inline_Always => Aspect_Inline,
- Aspect_Interrupt_Handler => Aspect_Interrupt_Handler,
- Aspect_Interrupt_Priority => Aspect_Interrupt_Priority,
- Aspect_Iterator_Element => Aspect_Iterator_Element,
- Aspect_All_Calls_Remote => Aspect_All_Calls_Remote,
- Aspect_Compiler_Unit => Aspect_Compiler_Unit,
- Aspect_Elaborate_Body => Aspect_Elaborate_Body,
- Aspect_Preelaborate => Aspect_Preelaborate,
- Aspect_Preelaborate_05 => Aspect_Preelaborate_05,
- Aspect_Pure => Aspect_Pure,
- Aspect_Pure_05 => Aspect_Pure_05,
- Aspect_Pure_12 => Aspect_Pure_12,
- Aspect_Remote_Call_Interface => Aspect_Remote_Call_Interface,
- Aspect_Remote_Types => Aspect_Remote_Types,
- Aspect_Shared_Passive => Aspect_Shared_Passive,
- Aspect_Universal_Data => Aspect_Universal_Data,
+ Aspect_Initial_Condition => Aspect_Initial_Condition,
+ Aspect_Initializes => Aspect_Initializes,
Aspect_Input => Aspect_Input,
+ Aspect_Interrupt_Handler => Aspect_Interrupt_Handler,
+ Aspect_Interrupt_Priority => Aspect_Priority,
Aspect_Invariant => Aspect_Invariant,
+ Aspect_Iterable => Aspect_Iterable,
+ Aspect_Iterator_Element => Aspect_Iterator_Element,
+ Aspect_Link_Name => Aspect_Link_Name,
+ Aspect_Linker_Section => Aspect_Linker_Section,
+ Aspect_Lock_Free => Aspect_Lock_Free,
Aspect_Machine_Radix => Aspect_Machine_Radix,
+ Aspect_Max_Entry_Queue_Depth => Aspect_Max_Entry_Queue_Depth,
+ Aspect_Max_Entry_Queue_Length => Aspect_Max_Entry_Queue_Length,
+ Aspect_Max_Queue_Length => Aspect_Max_Queue_Length,
+ Aspect_No_Caching => Aspect_No_Caching,
+ Aspect_No_Elaboration_Code_All => Aspect_No_Elaboration_Code_All,
+ Aspect_No_Inline => Aspect_No_Inline,
Aspect_No_Return => Aspect_No_Return,
+ Aspect_No_Tagged_Streams => Aspect_No_Tagged_Streams,
+ Aspect_Obsolescent => Aspect_Obsolescent,
Aspect_Object_Size => Aspect_Object_Size,
Aspect_Output => Aspect_Output,
Aspect_Pack => Aspect_Pack,
+ Aspect_Part_Of => Aspect_Part_Of,
Aspect_Persistent_BSS => Aspect_Persistent_BSS,
Aspect_Post => Aspect_Post,
Aspect_Postcondition => Aspect_Post,
Aspect_Pre => Aspect_Pre,
Aspect_Precondition => Aspect_Pre,
Aspect_Predicate => Aspect_Predicate,
+ Aspect_Predicate_Failure => Aspect_Predicate_Failure,
+ Aspect_Preelaborate => Aspect_Preelaborate,
Aspect_Preelaborable_Initialization => Aspect_Preelaborable_Initialization,
Aspect_Priority => Aspect_Priority,
+ Aspect_Pure => Aspect_Pure,
Aspect_Pure_Function => Aspect_Pure_Function,
+ Aspect_Refined_Depends => Aspect_Refined_Depends,
+ Aspect_Refined_Global => Aspect_Refined_Global,
+ Aspect_Refined_Post => Aspect_Refined_Post,
+ Aspect_Refined_State => Aspect_Refined_State,
+ Aspect_Remote_Access_Type => Aspect_Remote_Access_Type,
+ Aspect_Remote_Call_Interface => Aspect_Remote_Call_Interface,
+ Aspect_Remote_Types => Aspect_Remote_Types,
Aspect_Read => Aspect_Read,
+ Aspect_Relative_Deadline => Aspect_Relative_Deadline,
+ Aspect_Scalar_Storage_Order => Aspect_Scalar_Storage_Order,
+ Aspect_Secondary_Stack_Size => Aspect_Secondary_Stack_Size,
Aspect_Shared => Aspect_Atomic,
+ Aspect_Shared_Passive => Aspect_Shared_Passive,
+ Aspect_Simple_Storage_Pool => Aspect_Simple_Storage_Pool,
+ Aspect_Simple_Storage_Pool_Type => Aspect_Simple_Storage_Pool_Type,
Aspect_Size => Aspect_Size,
Aspect_Small => Aspect_Small,
+ Aspect_SPARK_Mode => Aspect_SPARK_Mode,
Aspect_Static_Predicate => Aspect_Predicate,
Aspect_Storage_Pool => Aspect_Storage_Pool,
Aspect_Storage_Size => Aspect_Storage_Size,
Aspect_Stream_Size => Aspect_Stream_Size,
Aspect_Suppress => Aspect_Suppress,
Aspect_Suppress_Debug_Info => Aspect_Suppress_Debug_Info,
+ Aspect_Suppress_Initialization => Aspect_Suppress_Initialization,
+ Aspect_Synchronization => Aspect_Synchronization,
Aspect_Test_Case => Aspect_Test_Case,
+ Aspect_Thread_Local_Storage => Aspect_Thread_Local_Storage,
Aspect_Type_Invariant => Aspect_Invariant,
Aspect_Unchecked_Union => Aspect_Unchecked_Union,
+ Aspect_Unimplemented => Aspect_Unimplemented,
Aspect_Universal_Aliasing => Aspect_Universal_Aliasing,
+ Aspect_Universal_Data => Aspect_Universal_Data,
Aspect_Unmodified => Aspect_Unmodified,
Aspect_Unreferenced => Aspect_Unreferenced,
Aspect_Unreferenced_Objects => Aspect_Unreferenced_Objects,
Aspect_Value_Size => Aspect_Value_Size,
Aspect_Volatile => Aspect_Volatile,
Aspect_Volatile_Components => Aspect_Volatile_Components,
+ Aspect_Volatile_Full_Access => Aspect_Volatile_Full_Access,
+ Aspect_Volatile_Function => Aspect_Volatile_Function,
Aspect_Warnings => Aspect_Warnings,
Aspect_Write => Aspect_Write);
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