template <bool, class T>
struct DepType : T {};
-struct NullBase {};
+struct NullBase {
+protected:
+ NullBase() = default;
+ NullBase(NullBase const&) = default;
+ NullBase& operator=(NullBase const&) = default;
+ NullBase(NullBase &&) = default;
+ NullBase& operator=(NullBase &&) = default;
+};
template <class Derived, bool Explicit = false>
struct TestBase {
++alive; ++constructed; ++value_constructed;
}
template <bool Dummy = true, typename std::enable_if<Dummy && !Explicit, bool>::type = true>
- TestBase(std::initializer_list<int>& il, int y = 0) noexcept : value(il.size()) {
+ explicit TestBase(std::initializer_list<int>& il, int y = 0) noexcept : value(il.size()) {
++alive; ++constructed; ++value_constructed;
}
TestBase& operator=(int xvalue) noexcept {
assert(value != -999); assert(alive > 0);
--alive; ++destroyed; value = -999;
}
- TestBase(TestBase const& o) noexcept : value(o.value) {
+ explicit TestBase(TestBase const& o) noexcept : value(o.value) {
assert(o.value != -1); assert(o.value != -999);
++alive; ++constructed; ++copy_constructed;
}
- TestBase(TestBase && o) noexcept : value(o.value) {
+ explicit TestBase(TestBase && o) noexcept : value(o.value) {
assert(o.value != -1); assert(o.value != -999);
++alive; ++constructed; ++move_constructed;
o.value = -1;