From: Piotr Trojanek <troja...@adacore.com>
For array delta aggregates the base expression cannot be limited; for
record delta aggregates the base expression can only be limited if it is
a newly constructed object.
gcc/ada/
* sem_aggr.adb (Resolve_Delta_Aggregate): Implement rules related
to limited objects appearing as the base expression.
Tested on x86_64-pc-linux-gnu, committed on master.
---
gcc/ada/sem_aggr.adb | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/gcc/ada/sem_aggr.adb b/gcc/ada/sem_aggr.adb
index 383f18f7301..4da05dd7317 100644
--- a/gcc/ada/sem_aggr.adb
+++ b/gcc/ada/sem_aggr.adb
@@ -3421,6 +3421,18 @@ package body Sem_Aggr is
Analyze_And_Resolve (Base, Typ);
if Is_Array_Type (Typ) then
+ -- For an array_delta_aggregate, the base_expression and each
+ -- expression in every array_component_association shall be of a
+ -- nonlimited type; RM 4.3.4(13/5). However, to prevent repeated
+ -- errors we only check the base expression and not array component
+ -- associations.
+
+ if Is_Limited_Type (Etype (Base)) then
+ Error_Msg_N
+ ("array delta aggregate shall be of a nonlimited type", Base);
+ Explain_Limited_Type (Etype (Base), Base);
+ end if;
+
Resolve_Delta_Array_Aggregate (N, Typ);
else
@@ -3432,6 +3444,11 @@ package body Sem_Aggr is
("delta aggregates for record types must use (), not '[']", N);
end if;
+ -- The base_expression of a record_delta_aggregate can be of a
+ -- limited type only if it is newly constructed; RM 7.5(2.1/5).
+
+ Check_Expr_OK_In_Limited_Aggregate (Base);
+
Resolve_Delta_Record_Aggregate (N, Typ);
end if;
--
2.34.1
