c++: Handle CWG2867 even in namespace scope structured bindings in header modules [PR115769]

The following patch implements the module streaming of the new
STATIC_INIT_DECOMP_BASE_P and STATIC_INIT_DECOMP_NONBASE_P flags.  As I think
namespace scope structured bindings in the header modules will be pretty rare,
I've tried to stream something extra only when they actually appear, in that
case it streams extra INTEGER_CSTs which mark end of
STATIC_INIT_DECOMP_*BASE_P (0), start of STATIC_INIT_DECOMP_BASE_P for
static_aggregates (1), start of STATIC_INIT_DECOMP_NONBASE_P for
static_aggregates (2) and ditto for tls_aggregates (3 and 4).
The patch also copies with just small tweaks the testcases from the
namespace scope structured binding CWG2867 patch.

2025-01-27  Jakub Jelinek  <jakub@redhat.com>

	PR c++/115769
gcc/cp/
	* module.cc (module_state::write_inits): Verify
	STATIC_INIT_DECOMP_{,NON}BASE_P flags and stream changes in those
	out.
	(module_state::read_inits): Stream those flags in.
gcc/testsuite/
	* g++.dg/modules/dr2867-1_a.H: New test.
	* g++.dg/modules/dr2867-1_b.C: New test.
	* g++.dg/modules/dr2867-2_a.H: New test.
	* g++.dg/modules/dr2867-2_b.C: New test.
	* g++.dg/modules/dr2867-3_a.H: New test.
	* g++.dg/modules/dr2867-3_b.C: New test.
	* g++.dg/modules/dr2867-4_a.H: New test.
	* g++.dg/modules/dr2867-4_b.C: New test.

0 files changed, 0 insertions, 0 deletions