| // RUN: %clang_cc1 %s -std=c++11 -fsyntax-only -verify -triple x86_64-linux-gnu |
| |
| struct S; |
| constexpr int extract(const S &s); |
| |
| struct S { |
| constexpr S() : n(extract(*this)), m(0) {} // expected-note {{in call to 'extract(s1)'}} |
| constexpr S(int k) : n(k), m(extract(*this)) {} |
| int n, m; |
| }; |
| |
| constexpr int extract(const S &s) { return s.n; } // expected-note {{read of object outside its lifetime is not allowed in a constant expression}} |
| |
| constexpr S s1; // ok |
| void f() { |
| constexpr S s1; // expected-error {{constant expression}} expected-note {{in call to 'S()'}} |
| constexpr S s2(10); |
| } |
| |
| typedef __attribute__((vector_size(16))) int vector_int; |
| |
| struct T { |
| constexpr T() : arr() {} |
| int arr[4]; |
| }; |
| struct U : T { |
| constexpr U(const int *p) : T(), another(), p(p) {} |
| constexpr U(const U &u) : T(), another(), p(u.p) {} |
| T another; |
| const int *p; |
| }; |
| constexpr U u1(&u1.arr[2]); |
| |
| constexpr int test_printing(int a, float b, _Complex int c, _Complex float d, |
| int *e, int &f, vector_int g, U h) { |
| return *e; // expected-note {{read of non-constexpr variable 'u2'}} |
| } |
| U u2(0); // expected-note {{here}} |
| static_assert(test_printing(12, 39.762, 3 + 4i, 12.9 + 3.6i, &u2.arr[4], u2.another.arr[2], (vector_int){5, 1, 2, 3}, u1) == 0, ""); // \ |
| expected-error {{constant expression}} \ |
| expected-note {{in call to 'test_printing(12, 3.976200e+01, 3+4i, 1.290000e+01+3.600000e+00i, &u2.T::arr[4], u2.another.arr[2], {5, 1, 2, 3}, {{{}}, {{}}, &u1.T::arr[2]})'}} |
| |
| struct V { |
| int arr[256] = {[255] = 42}; // expected-warning {{C99}} |
| }; |
| constexpr V v; |
| constexpr int get(const int *p) { return *p; } // expected-note {{read of dereferenced one-past-the-end pointer}} |
| constexpr int passLargeArray(V v) { return get(v.arr+256); } // expected-note {{in call to 'get(&v.arr[256])'}} |
| static_assert(passLargeArray(v) == 0, ""); // expected-error {{constant expression}} expected-note {{in call to 'passLargeArray({{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, ...}})'}} |
| |
| union Union { |
| constexpr Union(int n) : b(n) {} |
| constexpr Union(const Union &u) : b(u.b) {} |
| int a, b; |
| }; |
| constexpr Union myUnion = 76; |
| |
| constexpr int badness(Union u) { return u.a + u.b; } // expected-note {{read of member 'a' of union with active member 'b'}} |
| static_assert(badness(myUnion), ""); // expected-error {{constant expression}} \ |
| expected-note {{in call to 'badness({.b = 76})'}} |
| |
| struct MemPtrTest { |
| int n; |
| void f(); |
| }; |
| MemPtrTest mpt; // expected-note {{here}} |
| constexpr int MemPtr(int (MemPtrTest::*a), void (MemPtrTest::*b)(), int &c) { |
| return c; // expected-note {{read of non-constexpr variable 'mpt'}} |
| } |
| static_assert(MemPtr(&MemPtrTest::n, &MemPtrTest::f, mpt.*&MemPtrTest::n), ""); // expected-error {{constant expression}} \ |
| expected-note {{in call to 'MemPtr(&MemPtrTest::n, &MemPtrTest::f, mpt.n)'}} |
| |
| template<typename CharT> |
| constexpr CharT get(const CharT *p) { return p[-1]; } // expected-note 5{{}} |
| |
| constexpr char c = get("test\0\\\"\t\a\b\234"); // \ |
| expected-error {{}} expected-note {{"test\000\\\"\t\a\b\234"}} |
| constexpr char c8 = get(u8"test\0\\\"\t\a\b\234"); // \ |
| expected-error {{}} expected-note {{u8"test\000\\\"\t\a\b\234"}} |
| constexpr char16_t c16 = get(u"test\0\\\"\t\a\b\234\u1234"); // \ |
| expected-error {{}} expected-note {{u"test\000\\\"\t\a\b\234\u1234"}} |
| constexpr char32_t c32 = get(U"test\0\\\"\t\a\b\234\u1234\U0010ffff"); // \ |
| expected-error {{}} expected-note {{U"test\000\\\"\t\a\b\234\u1234\U0010FFFF"}} |
| constexpr wchar_t wc = get(L"test\0\\\"\t\a\b\234\u1234\xffffffff"); // \ |
| expected-error {{}} expected-note {{L"test\000\\\"\t\a\b\234\x1234\xFFFFFFFF"}} |
| |
| constexpr char32_t c32_err = get(U"\U00110000"); // expected-error {{invalid universal character}} |
| |
| #define fold(x) (__builtin_constant_p(x) ? (x) : (x)) |
| |
| typedef decltype(sizeof(int)) LabelDiffTy; |
| constexpr LabelDiffTy mulBy3(LabelDiffTy x) { return x * 3; } // expected-note {{subexpression}} |
| void LabelDiffTest() { |
| static_assert(mulBy3(fold((LabelDiffTy)&&a-(LabelDiffTy)&&b)) == 3, ""); // expected-error {{constant expression}} expected-note {{call to 'mulBy3(&&a - &&b)'}} |
| a:b:return; |
| } |
| |
| constexpr bool test_bool_printing(bool b) { return 1 / !(2*b | !(2*b)); } // expected-note 2{{division by zero}} |
| constexpr bool test_bool_0 = test_bool_printing(false); // expected-error {{constant expr}} expected-note {{in call to 'test_bool_printing(false)'}} |
| constexpr bool test_bool_1 = test_bool_printing(true); // expected-error {{constant expr}} expected-note {{in call to 'test_bool_printing(true)'}} |