1 // RUN: %clang_cc1 -fsyntax-only -std=c++11 %s -verify -Wno-c++1y-extensions 2 // RUN: %clang_cc1 -fsyntax-only -std=c++1y %s -verify 3 4 void print(); 5 6 template<typename T, typename... Ts> 7 void print(T first, Ts... rest) { 8 (void)first; 9 print(rest...); 10 } 11 12 template<typename... Ts> 13 void unexpanded_capture(Ts ...values) { 14 auto unexp = [values] {}; // expected-error{{initializer contains unexpanded parameter pack 'values'}} 15 } 16 17 template<typename... Ts> 18 void implicit_capture(Ts ...values) { 19 auto implicit = [&] { print(values...); }; 20 implicit(); 21 } 22 23 template<typename... Ts> 24 void do_print(Ts... values) { 25 auto bycopy = [values...]() { print(values...); }; 26 bycopy(); 27 auto byref = [&values...]() { print(values...); }; 28 byref(); 29 30 auto bycopy2 = [=]() { print(values...); }; 31 bycopy2(); 32 auto byref2 = [&]() { print(values...); }; 33 byref2(); 34 } 35 36 template void do_print(int, float, double); 37 38 template<typename T, int... Values> 39 void bogus_expansions(T x) { 40 auto l1 = [x...] {}; // expected-error{{pack expansion does not contain any unexpanded parameter packs}} 41 auto l2 = [Values...] {}; // expected-error{{'Values' in capture list does not name a variable}} 42 } 43 44 void g(int*, float*, double*); 45 46 template<class... Args> 47 void std_example(Args... args) { 48 auto lm = [&, args...] { return g(args...); }; 49 }; 50 51 template void std_example(int*, float*, double*); 52 53 template<typename ...Args> 54 void variadic_lambda(Args... args) { 55 auto lambda = [](Args... inner_args) { return g(inner_args...); }; 56 lambda(args...); 57 } 58 59 template void variadic_lambda(int*, float*, double*); 60 61 template<typename ...Args> 62 void init_capture_pack_err(Args ...args) { 63 [as(args)...] {} (); // expected-error {{expected ','}} 64 [as...(args)]{} (); // expected-error {{expected ','}} 65 } 66 67 template<typename ...Args> 68 void init_capture_pack_multi(Args ...args) { 69 [as(args...)] {} (); // expected-error {{initializer missing for lambda capture 'as'}} expected-error {{multiple}} 70 } 71 template void init_capture_pack_multi(); // expected-note {{instantiation}} 72 template void init_capture_pack_multi(int); 73 template void init_capture_pack_multi(int, int); // expected-note {{instantiation}} 74 75 template<typename ...Args> 76 void init_capture_pack_outer(Args ...args) { 77 print([as(args)] { return sizeof(as); } () ...); 78 } 79 template void init_capture_pack_outer(); 80 template void init_capture_pack_outer(int); 81 template void init_capture_pack_outer(int, int); 82
