https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85589
Bug ID: 85589
Summary: Non type template parameter should allow object with
no linkage
Product: gcc
Version: 7.3.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: gufideg at gmail dot com
Target Milestone: ---
Even though n4268 is marked as supported fully here:
https://gcc.gnu.org/projects/cxx-status.html, GCC does not yet support passing
the address or reference to an object with no linkage.
Such code should compile under C++17:
template<auto& v> struct foo {};
int main() {
static auto v = "str";
(void) foo<v> {};
}
But fail with:
error: 'v' is not a valid template argument for type 'const char*&' because
object 'v' does not have linkage
(void) foo<v> {};
^
Such code compiles under clang 6.0.0.
Live example: https://godbolt.org/g/aXjDBg
