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c++: fix namespace alias export

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This affected std::views in module std.

gcc/cp/ChangeLog:

	* name-lookup.cc (do_namespace_alias): set_originating_module after
	pushdecl.

gcc/testsuite/ChangeLog:

	* g++.dg/modules/namespace-7_a.C: New test.
	* g++.dg/modules/namespace-7_b.C: New test.
This commit is contained in:
Jason Merrill 2024-11-12 16:04:52 -05:00
parent e8ebc91615
commit 835530f4ee
3 changed files with 28 additions and 2 deletions
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8
gcc/cp/name-lookup.cc
View file

@ -6620,9 +6620,13 @@ do_namespace_alias (tree alias, tree name_space)
DECL_EXTERNAL (alias) = 1;
DECL_CONTEXT (alias) = FROB_CONTEXT (current_scope ());
TREE_PUBLIC (alias) = TREE_PUBLIC (DECL_CONTEXT (alias));
set_originating_module (alias);
pushdecl (alias);
alias = pushdecl (alias);
if (!DECL_P (alias) || !DECL_NAMESPACE_ALIAS (alias))
return;
set_originating_module (alias);
/* Emit debug info for namespace alias. */
if (!building_stmt_list_p ())

14
gcc/testsuite/g++.dg/modules/namespace-7_a.C Normal file
View file

@ -0,0 +1,14 @@
// { dg-additional-options "-fmodules -Wno-global-module" }
module;
namespace B { int i; }
namespace C = B;
export module foo;
// { dg-module-cmi foo }
export {
namespace B { using B::i; }
namespace C = B;
}

8
gcc/testsuite/g++.dg/modules/namespace-7_b.C Normal file
View file

@ -0,0 +1,8 @@
// { dg-additional-options "-fmodules" }
import foo;
int main()
{
C::i = 42;
}