https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96490
Bug ID: 96490
Summary: Template code with function pointers fails with very
cryptic error message
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: khim at google dot com
Target Milestone: ---
The following code works with all other compilers: https://godbolt.org/z/Mv3xsn
template<typename T, T p>
class TagType;
int foo();
constexpr auto foo_ptr = &foo;
template<typename T>
int test();
int bar() {
return test<TagType<decltype(&foo), &foo>>();
}
int baz() {
return test<TagType<decltype(foo_ptr), foo_ptr>>();
But GCC reports very cryptic error:
could not convert template argument 'foo_ptr' from 'int (* const)()' to 'int (*
const)()'
