https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91826
Bug ID: 91826
Summary: Unexpected behavior when class defined with namespace
alias
Product: gcc
Version: 9.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: mf at simerics dot com
Target Milestone: ---
The following code compile on GCC 7.3, MSVC 2015 & 2019.
It fail on GCC 9.2 with error: declaration of ‘class N2::N::C2’ in namespace
‘N2’ which does not enclose ‘N2::A2’
namespace N1 { class C1; }
namespace A1 = N1;
class A1::C1 {}; //Ok
namespace N2
{
namespace N { class C2; }
namespace A2 = N;
class A2::C2 {}; //Error
}
namespace N3 { namespace N { class C3; } }
namespace A3 = N3::N;
class A3::C3 {}; //Ok
