Invalid bracket encoding reported when using square brackets around strings

[liampwll]

Libadalang appears to treat any single string wrapped in square brackets as invalid, reporting "invalid bracket encoding". See the following valid code as an example:

pragma Ada_2022;

with Ada.Containers.Vectors;

procedure Example is
   type String_1 is new String (1 .. 1);

   package String_Vec is new Ada.Containers.Vectors (Positive, String_1);
   package Integer_Vec is new Ada.Containers.Vectors (Positive, Integer);

   V1 : String_Vec.Vector := ["a", "b"];
   V2 : Integer_Vec.Vector := [1];
   V3 : String_Vec.Vector := ["a"]; --  Error here
begin
   null;
end Example;

This has only been tested against the version of libadalang included in ALS 2026.0.202510141.

[Roldak]

Hello Liam, thanks for reporting this issue. Indeed, there is a grammar conflict between the GNAT-specific "bracket encoding" feature and Ada 2022's bracket aggregates.

We have opened an internal ticket to address this issue, we'll come back to you as soon as we have made progress on this.

Kind regards,