John McCall | 10f6f06 | 2013-05-06 07:40:34 +0000 | [diff] [blame] | 1 | // RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s |
| 2 | |
| 3 | // rdar://13784901 |
| 4 | |
| 5 | struct S0 { |
| 6 | int x; |
| 7 | static const int test0 = __alignof__(x); // expected-error {{invalid application of 'alignof' to a field of a class still being defined}} |
| 8 | static const int test1 = __alignof__(S0::x); // expected-error {{invalid application of 'alignof' to a field of a class still being defined}} |
| 9 | auto test2() -> char(&)[__alignof__(x)]; // expected-error {{invalid application of 'alignof' to a field of a class still being defined}} |
| 10 | }; |
| 11 | |
| 12 | struct S1; // expected-note 5 {{forward declaration}} |
| 13 | extern S1 s1; |
| 14 | const int test3 = __alignof__(s1); // expected-error {{invalid application of 'alignof' to an incomplete type 'S1'}} |
| 15 | |
| 16 | struct S2 { |
| 17 | S2(); |
| 18 | S1 &s; |
| 19 | int x; |
| 20 | |
| 21 | int test4 = __alignof__(x); // ok |
| 22 | int test5 = __alignof__(s); // expected-error {{invalid application of 'alignof' to an incomplete type 'S1'}} |
| 23 | }; |
| 24 | |
| 25 | const int test6 = __alignof__(S2::x); |
| 26 | const int test7 = __alignof__(S2::s); // expected-error {{invalid application of 'alignof' to an incomplete type 'S1'}} |
| 27 | |
| 28 | // Arguably, these should fail like the S1 cases do: the alignment of |
| 29 | // 's2.x' should depend on the alignment of both x-within-S2 and |
| 30 | // s2-within-S3 and thus require 'S3' to be complete. If we start |
| 31 | // doing the appropriate recursive walk to do that, we should make |
| 32 | // sure that these cases don't explode. |
| 33 | struct S3 { |
| 34 | S2 s2; |
| 35 | |
| 36 | static const int test8 = __alignof__(s2.x); |
| 37 | static const int test9 = __alignof__(s2.s); // expected-error {{invalid application of 'alignof' to an incomplete type 'S1'}} |
| 38 | auto test10() -> char(&)[__alignof__(s2.x)]; |
| 39 | static const int test11 = __alignof__(S3::s2.x); |
| 40 | static const int test12 = __alignof__(S3::s2.s); // expected-error {{invalid application of 'alignof' to an incomplete type 'S1'}} |
| 41 | auto test13() -> char(&)[__alignof__(s2.x)]; |
| 42 | }; |
| 43 | |
| 44 | // Same reasoning as S3. |
| 45 | struct S4 { |
| 46 | union { |
| 47 | int x; |
| 48 | }; |
| 49 | static const int test0 = __alignof__(x); |
| 50 | static const int test1 = __alignof__(S0::x); |
| 51 | auto test2() -> char(&)[__alignof__(x)]; |
| 52 | }; |