TestAssertWithAssignment.cpp (1941B)
1 #include "mozilla/MacroArgs.h" 2 3 static __attribute__((always_inline)) bool MOZ_AssertAssignmentTest(bool expr) { 4 return expr; 5 } 6 7 #define MOZ_UNLIKELY(x) (__builtin_expect(!!(x), 0)) 8 #define MOZ_CRASH() do { } while(0) 9 #define MOZ_CHECK_ASSERT_ASSIGNMENT(expr) MOZ_AssertAssignmentTest(!!(expr)) 10 11 #define MOZ_ASSERT_HELPER1(expr) \ 12 do { \ 13 if (MOZ_UNLIKELY(!MOZ_CHECK_ASSERT_ASSIGNMENT(expr))) { \ 14 MOZ_CRASH();\ 15 } \ 16 } while(0) \ 17 18 /* Now the two-argument form. */ 19 #define MOZ_ASSERT_HELPER2(expr, explain) \ 20 do { \ 21 if (MOZ_UNLIKELY(!MOZ_CHECK_ASSERT_ASSIGNMENT(expr))) { \ 22 MOZ_CRASH();\ 23 } \ 24 } while(0) \ 25 26 #define MOZ_RELEASE_ASSERT_GLUE(a, b) a b 27 #define MOZ_RELEASE_ASSERT(...) \ 28 MOZ_RELEASE_ASSERT_GLUE( \ 29 MOZ_PASTE_PREFIX_AND_ARG_COUNT(MOZ_ASSERT_HELPER, __VA_ARGS__), \ 30 (__VA_ARGS__)) 31 32 #define MOZ_ASSERT(...) MOZ_RELEASE_ASSERT(__VA_ARGS__) 33 34 void FunctionTest(int p) { 35 MOZ_ASSERT(p = 1); // expected-error {{Forbidden assignment in assert expression}} 36 } 37 38 void FunctionTest2(int p) { 39 MOZ_ASSERT(((p = 1))); // expected-error {{Forbidden assignment in assert expression}} 40 } 41 42 void FunctionTest3(int p) { 43 MOZ_ASSERT(p != 3); 44 } 45 46 class TestOverloading { 47 int value; 48 public: 49 explicit TestOverloading(int _val) : value(_val) {} 50 // different operators 51 explicit operator bool() const { return true; } 52 TestOverloading& operator=(const int _val) { value = _val; return *this; } 53 54 int& GetInt() {return value;} 55 }; 56 57 void TestOverloadingFunc() { 58 TestOverloading p(2); 59 int f; 60 61 MOZ_ASSERT(p); 62 MOZ_ASSERT(p = 3); // expected-error {{Forbidden assignment in assert expression}} 63 MOZ_ASSERT(p, "p is not valid"); 64 MOZ_ASSERT(p = 3, "p different than 3"); // expected-error {{Forbidden assignment in assert expression}} 65 MOZ_ASSERT(p.GetInt() = 2); // expected-error {{Forbidden assignment in assert expression}} 66 MOZ_ASSERT(p.GetInt() == 2); 67 MOZ_ASSERT(p.GetInt() == 2, f = 3); 68 }