https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65300
Bug ID: 65300 Summary: If one more constructor is defined, default params on using not passed from parent class Product: gcc Version: unknown Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: webmatematika at hotmail dot com Created attachment 34937 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34937&action=edit gcc t.cpp --std=c++11 I am wondering why class B compiles without problems, but class C shows errors on c4 construction, as default arguments are not passed. If this is by Standard, could you point me to that paragraph? Thank you for your time. t.cpp: In function ‘int main()’: t.cpp:24:4: error: no matching function for call to ‘C::C()’ C c4; ^ t.cpp:24:4: note: candidates are: t.cpp:13:12: note: C::C(int, int) using A::A; ^ t.cpp:13:12: note: candidate expects 2 arguments, 0 provided t.cpp:13:12: note: C::C(int) t.cpp:13:12: note: candidate expects 1 argument, 0 provided t.cpp:14:3: note: C::C(int, int, int) C(int c1, int c2, int c3) : A(c1, c2) {} ^ t.cpp:14:3: note: candidate expects 3 arguments, 0 provided t.cpp:11:7: note: constexpr C::C(const C&) class C : public A { ^ t.cpp:11:7: note: candidate expects 1 argument, 0 provided t.cpp:11:7: note: constexpr C::C(C&&) t.cpp:11:7: note: candidate expects 1 argument, 0 provided