[COMMITTED] ada: Ignore unconstrained components as inputs for Depends
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Commit Message
From: Piotr Trojanek <trojanek@adacore.com>
The current wording of SPARK RM 6.1.5(5) about the inputs for the
Depends contract doesn't mention "a record with at least one
unconstrained component".
gcc/ada/
* sem_prag.adb (Is_Unconstrained_Or_Tagged_Item): Update comment
and body.
Tested on x86_64-pc-linux-gnu, committed on master.
---
gcc/ada/sem_prag.adb | 38 ++------------------------------------
1 file changed, 2 insertions(+), 36 deletions(-)
@@ -283,8 +283,7 @@ package body Sem_Prag is
function Is_Unconstrained_Or_Tagged_Item (Item : Entity_Id) return Boolean;
-- Subsidiary to Collect_Subprogram_Inputs_Outputs and the analysis of
-- pragma Depends. Determine whether the type of dependency item Item is
- -- tagged, unconstrained array, unconstrained record or a record with at
- -- least one unconstrained component.
+ -- tagged, unconstrained array or unconstrained record.
procedure Record_Possible_Body_Reference
(State_Id : Entity_Id;
@@ -32957,36 +32956,7 @@ package body Sem_Prag is
function Is_Unconstrained_Or_Tagged_Item
(Item : Entity_Id) return Boolean
is
- function Has_Unconstrained_Component (Typ : Entity_Id) return Boolean;
- -- Determine whether record type Typ has at least one unconstrained
- -- component.
-
- ---------------------------------
- -- Has_Unconstrained_Component --
- ---------------------------------
-
- function Has_Unconstrained_Component (Typ : Entity_Id) return Boolean is
- Comp : Entity_Id;
-
- begin
- Comp := First_Component (Typ);
- while Present (Comp) loop
- if Is_Unconstrained_Or_Tagged_Item (Comp) then
- return True;
- end if;
-
- Next_Component (Comp);
- end loop;
-
- return False;
- end Has_Unconstrained_Component;
-
- -- Local variables
-
Typ : constant Entity_Id := Etype (Item);
-
- -- Start of processing for Is_Unconstrained_Or_Tagged_Item
-
begin
if Is_Tagged_Type (Typ) then
return True;
@@ -32995,11 +32965,7 @@ package body Sem_Prag is
return True;
elsif Is_Record_Type (Typ) then
- if Has_Discriminants (Typ) and then not Is_Constrained (Typ) then
- return True;
- else
- return Has_Unconstrained_Component (Typ);
- end if;
+ return Has_Discriminants (Typ) and then not Is_Constrained (Typ);
elsif Is_Private_Type (Typ) and then Has_Discriminants (Typ) then
return True;