When an object of a type with a specified Default_Value aspect is
declared without an explicit initial value and the default value is
out of range of the objects subtype, the compiler now issues a warning
that Constraint_Error will be raised due to an out-of-range value.
The test below must output a compiler warning as follows:
$ gcc -c -gnatj70 default_warning.adb
default_warning.adb:7:08: warning: value not in range of type
"Subint" defined at line 5,
"Constraint_Error" will be raised at run
time
procedure Default_Warning is
type Int_With_Default is new Integer with Default_Value => 0;
subtype Subint is Int_With_Default range 1 .. 100;
S : Subint;
begin
null;
end Default_Warning;
Tested on x86_64-pc-linux-gnu, committed on trunk
2018-01-11 Gary Dismukes <dismu...@adacore.com>
gcc/ada/
* exp_ch3.adb (Default_Initialize_Object): Call New_Copy_Tree on the
result of Get_Simple_Init_Value and pass the source location of the
object declaration's object_definition.
--- gcc/ada/exp_ch3.adb
+++ gcc/ada/exp_ch3.adb
@@ -6052,7 +6052,10 @@ package body Exp_Ch3 is
and then not Has_Init_Expression (N)
then
Set_No_Initialization (N, False);
- Set_Expression (N, Get_Simple_Init_Val (Typ, N, Esize (Def_Id)));
+ Set_Expression
+ (N, New_Copy_Tree
+ (Get_Simple_Init_Val (Typ, N, Esize (Def_Id)),
+ New_Sloc => Sloc (Obj_Def)));
Analyze_And_Resolve (Expression (N), Typ);
end if;