https://gcc.gnu.org/bugzilla/show_bug.cgi?id=124344
Bug ID: 124344
Summary: Default member initializer instantiation time
Product: gcc
Version: 16.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: antoshkka at gmail dot com
Target Milestone: ---
Consider the following example:
class Some0;
template <class T>
T* assert_complete() {
static_assert(sizeof(T) > 0);
return nullptr;
}
struct MyClass {
MyClass();
private:
Some0* impl_ = assert_complete<Some0>();
};
MyClass g;
At the moment the static_assert with GCC-16 fails. Other compilers do allow the
above code to compile.
Looks like a more lazy evaluation of default member initializer could improve
GCC compile times for cases where the default member initializer is used only
in .cpp file and the header file is used in many translation units.
Godbolt playground: https://godbolt.org/z/ecnKr6eK5
