[gcc r13-521] [Ada] Check token to be "access", reject it if not

[gcc r13-521] [Ada] Check token to be "access", reject it if not

[Pierre-Marie de Rodat]

https://gcc.gnu.org/g:7cff43618e6f300915ff9061608a974728315146

commit r13-521-g7cff43618e6f300915ff9061608a974728315146
Author: Etienne Servais <servais@adacore.com>
Date:   Wed Mar 16 17:48:22 2022 +0100

    [Ada] Check token to be "access", reject it if not
    
    The parser skips the token without verifying it is indeed "access".  So
    any token is accepted.
    
    gcc/ada/
    
            * par-ch3.adb (P_Access_Type_Definition): Outputs an error if
            token is not "access".

Diff:
---
 gcc/ada/par-ch3.adb | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/gcc/ada/par-ch3.adb b/gcc/ada/par-ch3.adb
index 08ffd7bf826..d7d12554ffd 100644
--- a/gcc/ada/par-ch3.adb
+++ b/gcc/ada/par-ch3.adb
@@ -4205,7 +4205,15 @@ package body Ch3 is
          --  second null exclusion is present in the access type definition.
 
          Not_Null_Present := P_Null_Exclusion; --  Ada 2005 (AI-231)
+
+         if Token /= Tok_Access then
+            Error_Msg
+              ("ACCESS expected",
+               Token_Ptr);
+         end if;
+
          Scan; -- past ACCESS
+
          Not_Null_Subtype_Loc := Token_Ptr;
          Not_Null_Subtype := P_Null_Exclusion; --  Might also appear
       end if;