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| author | Gary Dismukes <dismukes@adacore.com> | 2020-07-05 13:29:02 -0400 |
|---|---|---|
| committer | Pierre-Marie de Rodat <derodat@adacore.com> | 2020-10-19 05:53:35 -0400 |
| commit | c95f21001dc9b7dbe717ef84924220192c7b48ae (patch) | |
| tree | 552d7eeddfbee58526b7693e9a34383765d1b905 | |
| parent | e40cb362d0b3d49e5dc5a68c5dec1d5672c2832a (diff) | |
| download | gcc-c95f21001dc9b7dbe717ef84924220192c7b48ae.zip gcc-c95f21001dc9b7dbe717ef84924220192c7b48ae.tar.gz gcc-c95f21001dc9b7dbe717ef84924220192c7b48ae.tar.bz2 | |
[Ada] AI12-0170: Abstract subprogram calls in class-wide precond exprs
gcc/ada/
* sem_disp.adb (Check_Dispatching_Context): When the enclosing
subprogram is abstract, bypass early return if the call is
tag-indeterminate, to continue with the later error checking.
| -rw-r--r-- | gcc/ada/sem_disp.adb | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/gcc/ada/sem_disp.adb b/gcc/ada/sem_disp.adb index 67a8cdf..cf54337 100644 --- a/gcc/ada/sem_disp.adb +++ b/gcc/ada/sem_disp.adb @@ -575,12 +575,16 @@ package body Sem_Disp is -- Similarly, if this is a pre/postcondition for an abstract -- subprogram, it may call another abstract function which is -- a primitive of an abstract type. The call is non-dispatching - -- but will be legal in overridings of the operation. + -- but will be legal in overridings of the operation. However, + -- if the call is tag-indeterminate we want to continue with + -- with the error checking below, as this case is illegal even + -- for abstract subprograms (see AI12-0170). elsif (Is_Subprogram (Scop) or else Chars (Scop) = Name_Postcondition) and then - (Is_Abstract_Subprogram (Scop) + ((Is_Abstract_Subprogram (Scop) + and then not Is_Tag_Indeterminate (N)) or else (Nkind (Parent (Scop)) = N_Procedure_Specification and then Null_Present (Parent (Scop)))) |