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* [gcc r13-346] [Ada] Fix remaining asymmetry in Specific_Type
@ 2022-05-12 12:40 Pierre-Marie de Rodat
0 siblings, 0 replies; only message in thread
From: Pierre-Marie de Rodat @ 2022-05-12 12:40 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:b9cff88ca79664ade8bd1c870d01b56f8599afa4
commit r13-346-gb9cff88ca79664ade8bd1c870d01b56f8599afa4
Author: Eric Botcazou <ebotcazou@adacore.com>
Date: Sun Feb 6 15:54:25 2022 +0100
[Ada] Fix remaining asymmetry in Specific_Type
gcc/ada/
* sem_type.adb (Specific_Type): Add swapped cases for interfaces.
Diff:
---
gcc/ada/sem_type.adb | 23 ++++++++++++++++-------
1 file changed, 16 insertions(+), 7 deletions(-)
diff --git a/gcc/ada/sem_type.adb b/gcc/ada/sem_type.adb
index d5ee20b0c74..971b1a3183b 100644
--- a/gcc/ada/sem_type.adb
+++ b/gcc/ada/sem_type.adb
@@ -3354,13 +3354,8 @@ package body Sem_Type is
elsif T2 = Raise_Type then
return B1;
- -- ----------------------------------------------------------
- -- Special cases for equality operators (all other predefined
- -- operators can never apply to tagged types)
- -- ----------------------------------------------------------
-
-- Ada 2005 (AI-251): T1 and T2 are class-wide types, and T2 is an
- -- interface
+ -- interface, return T1, and vice versa.
elsif Is_Class_Wide_Type (T1)
and then Is_Class_Wide_Type (T2)
@@ -3368,8 +3363,14 @@ package body Sem_Type is
then
return T1;
+ elsif Is_Class_Wide_Type (T2)
+ and then Is_Class_Wide_Type (T1)
+ and then Is_Interface (Etype (T1))
+ then
+ return T2;
+
-- Ada 2005 (AI-251): T1 is a concrete type that implements the
- -- class-wide interface T2
+ -- class-wide interface T2, return T1, and vice versa.
elsif Is_Tagged_Type (T1)
and then Is_Class_Wide_Type (T2)
@@ -3379,6 +3380,14 @@ package body Sem_Type is
then
return T1;
+ elsif Is_Tagged_Type (T2)
+ and then Is_Class_Wide_Type (T1)
+ and then Is_Interface (Etype (T1))
+ and then Interface_Present_In_Ancestor (Typ => T2,
+ Iface => Etype (T1))
+ then
+ return T2;
+
elsif Is_Class_Wide_Type (T1)
and then Is_Ancestor (Root_Type (T1), T2)
then
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2022-05-12 12:40 [gcc r13-346] [Ada] Fix remaining asymmetry in Specific_Type Pierre-Marie de Rodat
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