1 // RUN: %clang_cc1 -fcxx-exceptions -fexceptions -fsyntax-only -verify -std=c++11 -ffreestanding %s
4 typedef decltype(nullptr) nullptr_t;
10 void o2(char*); // expected-note {{candidate}}
11 void o2(int A::*); // expected-note {{candidate}}
13 nullptr_t f(nullptr_t null)
15 // Implicit conversions.
24 void (*pf)() = nullptr;
26 void (A::*pmf)() = nullptr;
30 // Can't convert nullptr to integral implicitly.
31 uintptr_t i = nullptr; // expected-error {{cannot initialize}}
34 (void)(null == nullptr);
35 (void)(null <= nullptr);
37 (void)(null == (void*)0);
38 (void)((void*)0 == nullptr);
40 (void)(null <= (void*)0);
41 (void)((void*)0 <= nullptr);
46 (void)(1 > nullptr); // expected-error {{invalid operands to binary expression}}
47 (void)(1 != nullptr); // expected-error {{invalid operands to binary expression}}
48 (void)(1 + nullptr); // expected-error {{invalid operands to binary expression}}
49 (void)(0 ? nullptr : 0);
50 (void)(0 ? nullptr : (void*)0);
51 (void)(0 ? nullptr : A()); // expected-error {{non-pointer operand type 'A' incompatible with nullptr}}
52 (void)(0 ? A() : nullptr); // expected-error {{non-pointer operand type 'A' incompatible with nullptr}}
57 o2(nullptr); // expected-error {{ambiguous}}
59 // nullptr is an rvalue, null is an lvalue
60 (void)&nullptr; // expected-error {{cannot take the address of an rvalue of type 'nullptr_t'}}
61 nullptr_t *pn = &null;
63 // You can reinterpret_cast nullptr to an integer.
64 (void)reinterpret_cast<uintptr_t>(nullptr);
65 (void)reinterpret_cast<uintptr_t>(*pn);
67 // You can't reinterpret_cast nullptr to any integer
68 (void)reinterpret_cast<char>(nullptr); // expected-error {{cast from pointer to smaller type 'char' loses information}}
73 // You can throw nullptr.
77 // Template arguments can be nullptr.
78 template <int *PI, void (*PF)(), int A::*PM, void (A::*PMF)()>
81 typedef T<nullptr, nullptr, nullptr, nullptr> NT;
84 template<typename T, typename U> struct is_same {
85 static const bool value = false;
88 template<typename T> struct is_same<T, T> {
89 static const bool value = true;
95 // Test that we prefer g(void*) over g(bool).
96 static_assert(is_same<decltype(g(nullptr)), void*>::value, "");
100 void f(int, ...) __attribute__((sentinel));
103 // nullptr can be used as the sentinel value.
109 void f(const char*, ...) __attribute__((format(printf, 1, 2)));
112 // Don't warn when using nullptr with %p.
117 static_assert(__is_scalar(nullptr_t), "");
118 static_assert(__is_pod(nullptr_t), "");
119 static_assert(sizeof(nullptr_t) == sizeof(void*), "");
121 static_assert(!(nullptr < nullptr), "");
122 static_assert(!(nullptr > nullptr), "");
123 static_assert( nullptr <= nullptr, "");
124 static_assert( nullptr >= nullptr, "");
125 static_assert( nullptr == nullptr, "");
126 static_assert(!(nullptr != nullptr), "");
128 static_assert(!(0 < nullptr), "");
129 static_assert(!(0 > nullptr), "");
130 static_assert( 0 <= nullptr, "");
131 static_assert( 0 >= nullptr, "");
132 static_assert( 0 == nullptr, "");
133 static_assert(!(0 != nullptr), "");
135 static_assert(!(nullptr < 0), "");
136 static_assert(!(nullptr > 0), "");
137 static_assert( nullptr <= 0, "");
138 static_assert( nullptr >= 0, "");
139 static_assert( nullptr == 0, "");
140 static_assert(!(nullptr != 0), "");
142 namespace overloading {
147 int &ir = (f1)(nullptr);
150 struct ConvertsToNullPtr {
151 operator nullptr_t() const;
154 void test_conversion(ConvertsToNullPtr ctn) {
164 namespace templates {
165 template<typename T, nullptr_t Value>
175 template<int (*fp)(int), int* p, int A::* pmd, int (A::*pmf)(int)>
178 X2<nullptr, nullptr, nullptr, nullptr> x2;
181 namespace null_pointer_constant {
183 // Pending implementation of core issue 903, ensure we don't allow any of the
184 // C++11 constant evaluation semantics in null pointer constants.
186 constexpr int null() { return 0; }
187 void *p = S().n; // expected-error {{cannot initialize}}
188 void *q = null(); // expected-error {{cannot initialize}}