1*369c6483SErik Pilkington // RUN: %clang_cc1 -std=c++20 -fsyntax-only %s -pedantic -verify 2*369c6483SErik Pilkington 3*369c6483SErik Pilkington #define UIE __attribute__((using_if_exists)) 4*369c6483SErik Pilkington 5*369c6483SErik Pilkington namespace NS { 6*369c6483SErik Pilkington typedef int x; 7*369c6483SErik Pilkington } 8*369c6483SErik Pilkington 9*369c6483SErik Pilkington using NS::x __attribute__((using_if_exists)); 10*369c6483SErik Pilkington 11*369c6483SErik Pilkington using NS::x [[clang::using_if_exists]]; // expected-warning{{ISO C++ does not allow an attribute list to appear here}} 12*369c6483SErik Pilkington 13*369c6483SErik Pilkington [[clang::using_if_exists]] // expected-warning{{ISO C++ does not allow an attribute list to appear here}} 14*369c6483SErik Pilkington using NS::not_there, 15*369c6483SErik Pilkington NS::not_there2; 16*369c6483SErik Pilkington 17*369c6483SErik Pilkington using NS::not_there3, // expected-error {{no member named 'not_there3' in namespace 'NS'}} 18*369c6483SErik Pilkington NS::not_there4 [[clang::using_if_exists]]; // expected-warning{{C++ does not allow an attribute list to appear here}} 19*369c6483SErik Pilkington 20*369c6483SErik Pilkington [[clang::using_if_exists]] using NS::not_there5 [[clang::using_if_exists]]; // expected-warning 2 {{ISO C++ does not allow}} 21*369c6483SErik Pilkington 22*369c6483SErik Pilkington struct Base {}; 23*369c6483SErik Pilkington struct Derived : Base { 24*369c6483SErik Pilkington [[clang::using_if_exists]] using Base::x; // expected-warning {{ISO C++ does not allow an attribute list to appear here}} 25*369c6483SErik Pilkington using Base::y [[clang::using_if_exists]]; // expected-warning {{ISO C++ does not allow an attribute list to appear here}} 26*369c6483SErik Pilkington [[clang::using_if_exists]] using Base::z, Base::q; // expected-warning {{C++ does not allow an attribute list to appear here}} 27*369c6483SErik Pilkington }; 28