| 1 | // RUN: %clang_cc1 -fsyntax-only -verify %s |
|---|
| 2 | // RUN: %clang_cc1 -fsyntax-only -verify -std=c++98 %s |
|---|
| 3 | // RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s |
|---|
| 4 | |
|---|
| 5 | struct X1 { // has no implicit default constructor |
|---|
| 6 | X1(int); |
|---|
| 7 | }; |
|---|
| 8 | |
|---|
| 9 | struct X2 : X1 { |
|---|
| 10 | #if __cplusplus <= 199711L |
|---|
| 11 | // expected-note@-2 2 {{'X2' declared here}} |
|---|
| 12 | #endif |
|---|
| 13 | |
|---|
| 14 | X2(int); |
|---|
| 15 | }; |
|---|
| 16 | |
|---|
| 17 | struct X3 : public X2 { |
|---|
| 18 | #if __cplusplus <= 199711L |
|---|
| 19 | // expected-error@-2 {{implicit default constructor for 'X3' must explicitly initialize the base class 'X2' which does not have a default constructor}} |
|---|
| 20 | #else |
|---|
| 21 | // expected-note@-4 {{default constructor of 'X3' is implicitly deleted because base class 'X2' has no default constructor}} |
|---|
| 22 | #endif |
|---|
| 23 | }; |
|---|
| 24 | |
|---|
| 25 | X3 x3; |
|---|
| 26 | #if __cplusplus <= 199711L |
|---|
| 27 | // expected-note@-2 {{first required here}} |
|---|
| 28 | #else |
|---|
| 29 | // expected-error@-4 {{call to implicitly-deleted default constructor of 'X3'}} |
|---|
| 30 | #endif |
|---|
| 31 | |
|---|
| 32 | struct X4 { |
|---|
| 33 | #if __cplusplus <= 199711L |
|---|
| 34 | // expected-error@-2 {{must explicitly initialize the member 'x2'}} |
|---|
| 35 | // expected-error@-3 {{must explicitly initialize the reference member 'rx2'}} |
|---|
| 36 | #endif |
|---|
| 37 | |
|---|
| 38 | X2 x2; |
|---|
| 39 | #if __cplusplus <= 199711L |
|---|
| 40 | // expected-note@-2 {{member is declared here}} |
|---|
| 41 | #else |
|---|
| 42 | // expected-note@-4 {{default constructor of 'X4' is implicitly deleted because field 'x2' has no default constructor}} |
|---|
| 43 | #endif |
|---|
| 44 | |
|---|
| 45 | X2 & rx2; |
|---|
| 46 | #if __cplusplus <= 199711L |
|---|
| 47 | // expected-note@-2 {{declared here}} |
|---|
| 48 | #endif |
|---|
| 49 | }; |
|---|
| 50 | |
|---|
| 51 | X4 x4; |
|---|
| 52 | #if __cplusplus <= 199711L |
|---|
| 53 | // expected-note@-2 {{first required here}} |
|---|
| 54 | #else |
|---|
| 55 | // expected-error@-4 {{call to implicitly-deleted default constructor of 'X4'}} |
|---|
| 56 | #endif |
|---|
| 57 | |
|---|
| 58 | struct Y1 { // has no implicit default constructor |
|---|
| 59 | Y1(int); |
|---|
| 60 | }; |
|---|
| 61 | |
|---|
| 62 | struct Y2 : Y1 { |
|---|
| 63 | Y2(int); |
|---|
| 64 | Y2(); |
|---|
| 65 | }; |
|---|
| 66 | |
|---|
| 67 | struct Y3 : public Y2 { |
|---|
| 68 | }; |
|---|
| 69 | Y3 y3; |
|---|
| 70 | |
|---|
| 71 | struct Y4 { |
|---|
| 72 | Y2 y2; |
|---|
| 73 | }; |
|---|
| 74 | |
|---|
| 75 | Y4 y4; |
|---|
| 76 | |
|---|
| 77 | // More tests |
|---|
| 78 | |
|---|
| 79 | struct Z1 { |
|---|
| 80 | #if __cplusplus <= 199711L |
|---|
| 81 | // expected-error@-2 {{must explicitly initialize the reference member 'z'}} |
|---|
| 82 | // expected-error@-3 {{must explicitly initialize the const member 'c1'}} |
|---|
| 83 | #endif |
|---|
| 84 | |
|---|
| 85 | int& z; |
|---|
| 86 | #if __cplusplus <= 199711L |
|---|
| 87 | // expected-note@-2 {{declared here}} |
|---|
| 88 | #else |
|---|
| 89 | // expected-note@-4 {{default constructor of 'Z1' is implicitly deleted because field 'z' of reference type 'int &' would not be initialized}} |
|---|
| 90 | #endif |
|---|
| 91 | |
|---|
| 92 | const int c1; |
|---|
| 93 | #if __cplusplus <= 199711L |
|---|
| 94 | // expected-note@-2 {{declared here}} |
|---|
| 95 | #endif |
|---|
| 96 | volatile int v1; |
|---|
| 97 | }; |
|---|
| 98 | |
|---|
| 99 | // Test default initialization which *requires* a constructor call for non-POD. |
|---|
| 100 | Z1 z1; |
|---|
| 101 | #if __cplusplus <= 199711L |
|---|
| 102 | // expected-note@-2 {{first required here}} |
|---|
| 103 | #else |
|---|
| 104 | // expected-error@-4 {{call to implicitly-deleted default constructor of 'Z1'}} |
|---|
| 105 | #endif |
|---|
| 106 | |
|---|
| 107 | // Ensure that value initialization doesn't use trivial implicit constructors. |
|---|
| 108 | namespace PR7948 { |
|---|
| 109 | // Note that this is also non-POD to ensure we don't just special case PODs. |
|---|
| 110 | struct S { const int x; ~S(); }; |
|---|
| 111 | const S arr[2] = { { 42 } }; |
|---|
| 112 | } |
|---|
| 113 | |
|---|
| 114 | // This is valid |
|---|
| 115 | union U { |
|---|
| 116 | const int i; |
|---|
| 117 | float f; |
|---|
| 118 | }; |
|---|
| 119 | U u; |
|---|
| 120 | |
|---|