| // RUN: %clang_cc1 -fsyntax-only -triple x86_64-linux-gnu -verify %s |
| // RUN: %clang_cc1 -fsyntax-only -triple x86_64-linux-gnu -verify %s -fexperimental-new-constant-interpreter |
| |
| #if !__has_extension(datasizeof) |
| # error "Expected datasizeof extension" |
| #endif |
| |
| struct HasPadding { |
| int i; |
| char c; |
| }; |
| |
| struct HasUsablePadding { |
| int i; |
| char c; |
| |
| HasUsablePadding() {} |
| }; |
| |
| struct Incomplete; // expected-note {{forward declaration of 'Incomplete'}} |
| |
| static_assert(__datasizeof(int) == 4); |
| static_assert(__datasizeof(HasPadding) == 8); |
| static_assert(__datasizeof(HasUsablePadding) == 5); |
| static_assert(__datasizeof(void)); // expected-error {{invalid application of '__datasizeof' to an incomplete type 'void'}} |
| static_assert(__datasizeof(Incomplete)); // expected-error {{invalid application of '__datasizeof' to an incomplete type 'Incomplete'}} |
| |
| static_assert([] { |
| int* p = nullptr; |
| HasPadding* p2 = nullptr; |
| HasUsablePadding* p3 = nullptr; |
| static_assert(__datasizeof(*p) == 4); |
| static_assert(__datasizeof *p == 4); |
| static_assert(__datasizeof(*p2) == 8); |
| static_assert(__datasizeof(*p3) == 5); |
| |
| return true; |
| }()); |
| |
| template <typename Ty> |
| constexpr int data_size_of() { |
| return __datasizeof(Ty); |
| } |
| static_assert(data_size_of<int>() == __datasizeof(int)); |
| static_assert(data_size_of<HasPadding>() == __datasizeof(HasPadding)); |
| static_assert(data_size_of<HasUsablePadding>() == __datasizeof(HasUsablePadding)); |
| |
| struct S { |
| int i = __datasizeof(S); |
| float f; |
| char c; |
| }; |
| |
| static_assert(S{}.i == 9); |
| |
| namespace GH80284 { |
| struct Bar; // expected-note{{forward declaration}} |
| struct Foo { |
| Bar x; // expected-error{{field has incomplete type}} |
| }; |
| constexpr int a = __datasizeof(Foo); |
| } |