https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113683
Bug ID: 113683
Summary: explicit template instantiation wrongly checks private
base class accessibility
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: schaumb at gmail dot com
Target Milestone: ---
The compiler wrongly checks that the (private) base class is accessible when
explicit template instantiation happens. (standard: C++20)
It shouldn't, see https://eel.is/c++draft/temp.spec#general-6
template<const auto* v>
struct I{};
struct A {};
class B : A {
static const B b;
};
I need to instantiate the B::b object address with const A*.
But this line is failing:
template struct I<static_cast<const A*>(&B::b)>; // fails on static_cast
Simplified "real" example code: https://godbolt.org/z/zj9co5bMh
