https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121299
Bug ID: 121299
Summary: conflicting namespace resolution
Product: gcc
Version: 15.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: development at jordi dot vilar.cat
Target Milestone: ---
'using namespace' should fail if the designated namespace is ambiguous.
The following code illustrates the bug, compiles fine but should fail. (just
using -std=c++23)
namespace A
{
inline namespace B
{
namespace C
{
void foo();
}
}
namespace C
{
void bar();
}
void test()
{
// this should compile fine as C::foo and C::bar are not ambiguous
C::foo(); // -> should resolve to ::A::B::C::foo
C::bar(); // -> should resolve to ::A::C::bar
// this should fail, as C is ambiguous
using namespace C;
foo();
bar();
}
}
This issue can be reproduced in the compiler explorer:
https://godbolt.org/z/4KxGo443W
