1 // RUN: %clang_cc1 -fsyntax-only -fcxx-exceptions -verify -pedantic -std=c++11 %s 2 3 int align_illegal alignas(3); //expected-error {{requested alignment is not a power of 2}} 4 char align_big alignas(int); 5 int align_small alignas(1); // expected-error {{requested alignment is less than minimum}} 6 int align_multiple alignas(1) alignas(8) alignas(1); 7 alignas(4) int align_before; 8 9 struct align_member { 10 int member alignas(8); 11 int bitfield alignas(1) : 1; // expected-error {{}} 12 }; 13 14 void f(alignas(1) char c) { // expected-error {{'alignas' attribute cannot be applied to a function parameter}} 15 alignas(1) register char k; // expected-error {{'alignas' attribute cannot be applied to a variable with 'register' storage class}} expected-warning {{deprecated}} 16 try { 17 } catch (alignas(4) int n) { // expected-error {{'alignas' attribute cannot be applied to a 'catch' variable}} 18 } 19 } 20 21 22 template <unsigned A> struct alignas(A) align_class_template {}; 23 24 template <typename... T> struct alignas(T...) align_class_temp_pack_type {}; 25 template <unsigned... A> struct alignas(A...) align_class_temp_pack_expr {}; 26 struct alignas(int...) alignas_expansion_no_packs {}; // expected-error {{pack expansion does not contain any unexpanded parameter packs}} 27 template <typename... A> struct outer { 28 template <typename... B> struct alignas(alignof(A) * alignof(B)...) inner {}; 29 // expected-error@-1 {{pack expansion contains parameter packs 'A' and 'B' that have different lengths (1 vs. 2)}} 30 }; 31 outer<int>::inner<short, double> mismatched_packs; // expected-note {{in instantiation of}} 32 33 typedef char align_typedef alignas(8); // expected-error {{'alignas' attribute only applies to variables, data members and tag types}} 34 template<typename T> using align_alias_template = align_typedef alignas(8); // expected-error {{'alignas' attribute cannot be applied to types}} 35 36 static_assert(alignof(align_big) == alignof(int), "k's alignment is wrong"); // expected-warning{{'alignof' applied to an expression is a GNU extension}} 37 static_assert(alignof(align_small) == 1, "j's alignment is wrong"); // expected-warning{{'alignof' applied to an expression is a GNU extension}} 38 static_assert(alignof(align_multiple) == 8, "l's alignment is wrong"); // expected-warning{{'alignof' applied to an expression is a GNU extension}} 39 static_assert(alignof(align_member) == 8, "quuux's alignment is wrong"); 40 static_assert(sizeof(align_member) == 8, "quuux's size is wrong"); 41 static_assert(alignof(align_class_template<8>) == 8, "template's alignment is wrong"); 42 static_assert(alignof(align_class_template<16>) == 16, "template's alignment is wrong"); 43 static_assert(alignof(align_class_temp_pack_type<short, int, long>) == alignof(long), "template's alignment is wrong"); 44 static_assert(alignof(align_class_temp_pack_expr<8, 16, 32>) == 32, "template's alignment is wrong"); 45 static_assert(alignof(outer<int,char>::inner<double,short>) == alignof(int) * alignof(double), "template's alignment is wrong"); 46 47 static_assert(alignof(int(int)) >= 1, "alignof(function) not positive"); // expected-error{{invalid application of 'alignof' to a function type}} 48 49 [[__carries_dependency__]] // expected-warning{{unknown attribute '__carries_dependency__' ignored}} 50 void func(void); 51 52 alignas(4) auto PR19252 = 0; 53
