test.cpp:(.text+0xb3): undefined reference to `A::~A()'
test.cpp:(.text+0x127): undefined reference to `A::~A()'
test.cpp:(.text+0x15a): undefined reference to `A::~A()'
test.cpp:(.text$_ZN1BD1Ev[B::~B()]+0x16): undefined reference to `parent::operators<A>::~operators()'
test.cpp:(.text$_ZN1AC1Ev[A::A()]+0x5a): undefined reference to `vtable for A'
test.cpp:(.text$_ZN1AC1Ev[A::A()]+0x66): undefined reference to `vtable for A'
test.cpp:(.text$_ZN1AC1Ev[A::A()]+0x89): undefined reference to `parent::~parent()'
test.cpp:(.text$_ZN6parentC2Ev[parent::parent()]+0x8): undefined reference to `vtable for parent'
test.cpp:(.rdata$_ZTVN6parent9operatorsI1AEE[vtable for parent::operators<A>]+0x8): undefined reference to `parent::operators<A>::~operators()'
test.cpp:(.rdata$_ZTVN6parent9operatorsI1AEE[vtable for parent::operators<A>]+0xc): undefined reference to `parent::operators<A>::~operators()'
test.cpp:(.text$_ZN1BD0Ev[B::~B()]+0x16): undefined reference to `parent::operators<A>::~operators()'
collect2: ld returned 1 exit status