[Bug c++/115605] structured binding break if a variable named tuple_size is visibile at the decomposition site

[cvs-commit at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115605

--- Comment #8 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Iain D Sandoe <ia...@gcc.gnu.org>:

https://gcc.gnu.org/g:cf588f1a8e7406ced5b08f32f9d23f015a240a31

commit r16-1350-gcf588f1a8e7406ced5b08f32f9d23f015a240a31
Author: Iain Sandoe <i...@sandoe.co.uk>
Date:   Mon Jun 2 09:42:23 2025 +0100

    c++: Fix template class lookup [PR120495, PR115605].

    In the reported issues, using lookup_template_class () directly on (for
example)
    the coroutine_handle identifier fails because a class-local  TYPE_DECL is
found.
    This is because, in the existing code, lookup is called with default
parameters
    which means that class contexts are examined first.

    Fix this, when a context is provided by the caller, by doing lookup in
namespace
    provided.

            PR c++/120495
            PR c++/115605

    gcc/cp/ChangeLog:

            * pt.cc (lookup_template_class): Honour provided namespace contexts
            when looking up class templates.

    gcc/testsuite/ChangeLog:

            * g++.dg/coroutines/pr120495.C: New test.
            * g++.dg/pr115605.C: New test.

    Signed-off-by: Iain Sandoe <i...@sandoe.co.uk>