| 1 | // RUN: %check_clang_tidy %s bugprone-casting-through-void %t |
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| 2 | |
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| 3 | using V = void*; |
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| 4 | using CV = const void*; |
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| 5 | |
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| 6 | int i = 100; |
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| 7 | double d = 100; |
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| 8 | const int ci = 100; |
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| 9 | const double cd = 100; |
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| 10 | |
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| 11 | void normal_test() { |
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| 12 | static_cast<int *>(static_cast<void *>(&d)); |
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| 13 | // CHECK-MESSAGES: :[[@LINE-1]]:22: warning: do not cast 'double *' to 'int *' through 'void *' [bugprone-casting-through-void] |
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| 14 | static_cast<int *>(static_cast<V>(&d)); |
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| 15 | // CHECK-MESSAGES: :[[@LINE-1]]:22: warning: do not cast 'double *' to 'int *' through 'V' (aka 'void *') [bugprone-casting-through-void] |
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| 16 | static_cast<int *>(static_cast<void *>(&i)); |
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| 17 | // CHECK-MESSAGES: :[[@LINE-1]]:22: warning: do not cast 'int *' to 'int *' through 'void *' [bugprone-casting-through-void] |
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| 18 | |
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| 19 | static_cast<void *>(static_cast<void *>(&i)); |
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| 20 | } |
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| 21 | |
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| 22 | void const_pointer_test() { |
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| 23 | static_cast<int *const>(static_cast<void *>(&d)); |
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| 24 | // CHECK-MESSAGES: :[[@LINE-1]]:27: warning: do not cast 'double *' to 'int *const' through 'void *' [bugprone-casting-through-void] |
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| 25 | static_cast<int *const>(static_cast<V>(&d)); |
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| 26 | // CHECK-MESSAGES: :[[@LINE-1]]:27: warning: do not cast 'double *' to 'int *const' through 'V' (aka 'void *') [bugprone-casting-through-void] |
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| 27 | static_cast<int *const>(static_cast<void *>(&i)); |
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| 28 | // CHECK-MESSAGES: :[[@LINE-1]]:27: warning: do not cast 'int *' to 'int *const' through 'void *' [bugprone-casting-through-void] |
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| 29 | |
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| 30 | static_cast<void *const>(static_cast<void *>(&i)); |
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| 31 | } |
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| 32 | |
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| 33 | void const_test() { |
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| 34 | static_cast<const int *>(static_cast<const void *>(&d)); |
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| 35 | // CHECK-MESSAGES: :[[@LINE-1]]:28: warning: do not cast 'double *' to 'const int *' through 'const void *' [bugprone-casting-through-void] |
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| 36 | static_cast<const int *>(static_cast<const V>(&d)); |
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| 37 | // CHECK-MESSAGES: :[[@LINE-1]]:28: warning: do not cast 'double *' to 'const int *' through 'const V' (aka 'void *const') [bugprone-casting-through-void] |
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| 38 | static_cast<const int *>(static_cast<const void *>(&i)); |
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| 39 | // CHECK-MESSAGES: :[[@LINE-1]]:28: warning: do not cast 'int *' to 'const int *' through 'const void *' [bugprone-casting-through-void] |
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| 40 | |
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| 41 | static_cast<const void *>(static_cast<const void *>(&i)); |
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| 42 | |
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| 43 | static_cast<const int *>(static_cast<const void *>(&cd)); |
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| 44 | // CHECK-MESSAGES: :[[@LINE-1]]:28: warning: do not cast 'const double *' to 'const int *' through 'const void *' [bugprone-casting-through-void] |
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| 45 | static_cast<const int *>(static_cast<const CV>(&cd)); |
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| 46 | // CHECK-MESSAGES: :[[@LINE-1]]:28: warning: do not cast 'const double *' to 'const int *' through 'const CV' (aka 'const void *const') [bugprone-casting-through-void] |
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| 47 | static_cast<const int *>(static_cast<const void *>(&ci)); |
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| 48 | // CHECK-MESSAGES: :[[@LINE-1]]:28: warning: do not cast 'const int *' to 'const int *' through 'const void *' [bugprone-casting-through-void] |
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| 49 | |
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| 50 | static_cast<const void *>(static_cast<const void *>(&ci)); |
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| 51 | } |
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| 52 | |
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| 53 | |
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| 54 | void reinterpret_cast_test() { |
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| 55 | static_cast<int *>(reinterpret_cast<void *>(&d)); |
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| 56 | // CHECK-MESSAGES: :[[@LINE-1]]:22: warning: do not cast 'double *' to 'int *' through 'void *' [bugprone-casting-through-void] |
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| 57 | reinterpret_cast<int *>(static_cast<void *>(&d)); |
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| 58 | // CHECK-MESSAGES: :[[@LINE-1]]:27: warning: do not cast 'double *' to 'int *' through 'void *' [bugprone-casting-through-void] |
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| 59 | reinterpret_cast<int *>(reinterpret_cast<void *>(&d)); |
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| 60 | // CHECK-MESSAGES: :[[@LINE-1]]:27: warning: do not cast 'double *' to 'int *' through 'void *' [bugprone-casting-through-void] |
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| 61 | |
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| 62 | static_cast<void *>(reinterpret_cast<void *>(&i)); |
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| 63 | reinterpret_cast<void *>(reinterpret_cast<void *>(&i)); |
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| 64 | reinterpret_cast<void *>(static_cast<void *>(&i)); |
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| 65 | } |
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| 66 | |
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| 67 | void c_style_cast_test() { |
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| 68 | static_cast<int *>((void *)&d); |
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| 69 | // CHECK-MESSAGES: :[[@LINE-1]]:22: warning: do not cast 'double *' to 'int *' through 'void *' [bugprone-casting-through-void] |
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| 70 | (int *)(void *)&d; |
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| 71 | // CHECK-MESSAGES: :[[@LINE-1]]:10: warning: do not cast 'double *' to 'int *' through 'void *' [bugprone-casting-through-void] |
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| 72 | static_cast<int *>((void *)&d); |
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| 73 | // CHECK-MESSAGES: :[[@LINE-1]]:22: warning: do not cast 'double *' to 'int *' through 'void *' [bugprone-casting-through-void] |
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| 74 | |
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| 75 | static_cast<void *>((void *)&i); |
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| 76 | } |
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| 77 | |
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| 78 | struct A { |
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| 79 | A(void*); |
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| 80 | }; |
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| 81 | using I = int *; |
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| 82 | void cxx_functional_cast() { |
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| 83 | A(static_cast<void*>(&d)); |
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| 84 | I(static_cast<void*>(&d)); |
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| 85 | // CHECK-MESSAGES: :[[@LINE-1]]:5: warning: do not cast 'double *' to 'I' (aka 'int *') through 'void *' [bugprone-casting-through-void] |
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| 86 | } |
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| 87 | |
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| 88 | void bit_cast() { |
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| 89 | __builtin_bit_cast(int *, static_cast<void *>(&d)); |
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| 90 | // CHECK-MESSAGES: :[[@LINE-1]]:29: warning: do not cast 'double *' to 'int *' through 'void *' [bugprone-casting-through-void] |
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| 91 | } |
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| 92 | |
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