Add the clang library to the repo (with some of my changes, too).

1 files changed, 185 insertions, 0 deletions

diff --git a/clang/test/SemaCXX/nullptr.cpp b/clang/test/SemaCXX/nullptr.cpp
new file mode 100644
index 0000000..e313603
--- /dev/null
+++ b/clang/test/SemaCXX/nullptr.cpp
@@ -0,0 +1,185 @@
+// RUN: %clang_cc1 -fcxx-exceptions -fexceptions -fsyntax-only -verify -std=c++11 -ffreestanding %s
+#include <stdint.h>
+
+typedef decltype(nullptr) nullptr_t;
+
+struct A {};
+
+int o1(char*);
+void o1(uintptr_t);
+void o2(char*); // expected-note {{candidate}}
+void o2(int A::*); // expected-note {{candidate}}
+
+nullptr_t f(nullptr_t null)
+{
+  // Implicit conversions.
+  null = nullptr;
+  void *p = nullptr;
+  p = null;
+  int *pi = nullptr;
+  pi = null;
+  null = 0;
+  int A::*pm = nullptr;
+  pm = null;
+  void (*pf)() = nullptr;
+  pf = null;
+  void (A::*pmf)() = nullptr;
+  pmf = null;
+  bool b = nullptr;
+
+  // Can't convert nullptr to integral implicitly.
+  uintptr_t i = nullptr; // expected-error {{cannot initialize}}
+
+  // Operators
+  (void)(null == nullptr);
+  (void)(null <= nullptr);
+  (void)(null == (void*)0);
+  (void)((void*)0 == nullptr);
+  (void)(null <= (void*)0);
+  (void)((void*)0 <= nullptr);
+  (void)(0 == nullptr);
+  (void)(nullptr == 0);
+  (void)(nullptr <= 0);
+  (void)(0 <= nullptr);
+  (void)(1 > nullptr); // expected-error {{invalid operands to binary expression}}
+  (void)(1 != nullptr); // expected-error {{invalid operands to binary expression}}
+  (void)(1 + nullptr); // expected-error {{invalid operands to binary expression}}
+  (void)(0 ? nullptr : 0); // expected-error {{non-pointer operand type 'int' incompatible with nullptr}}
+  (void)(0 ? nullptr : (void*)0);
+  (void)(0 ? nullptr : A()); // expected-error {{non-pointer operand type 'A' incompatible with nullptr}}
+  (void)(0 ? A() : nullptr); // expected-error {{non-pointer operand type 'A' incompatible with nullptr}}
+
+  // Overloading
+  int t = o1(nullptr);
+  t = o1(null);
+  o2(nullptr); // expected-error {{ambiguous}}
+
+  // nullptr is an rvalue, null is an lvalue
+  (void)&nullptr; // expected-error {{address expression must be an lvalue}}
+  nullptr_t *pn = &null;
+
+  // You can reinterpret_cast nullptr to an integer.
+  (void)reinterpret_cast<uintptr_t>(nullptr);
+  (void)reinterpret_cast<uintptr_t>(*pn);
+
+  int *ip = *pn;
+  if (*pn) { }
+
+  // You can throw nullptr.
+  throw nullptr;
+}
+
+// Template arguments can be nullptr.
+template <int *PI, void (*PF)(), int A::*PM, void (A::*PMF)()>
+struct T {};
+
+typedef T<nullptr, nullptr, nullptr, nullptr> NT;
+
+namespace test1 { 
+template<typename T, typename U> struct is_same {
+  static const bool value = false;
+};
+
+template<typename T> struct is_same<T, T> {
+  static const bool value = true;
+};
+
+void *g(void*);
+bool g(bool);
+
+// Test that we prefer g(void*) over g(bool).
+static_assert(is_same<decltype(g(nullptr)), void*>::value, "");
+}
+
+namespace test2 {
+  void f(int, ...) __attribute__((sentinel));
+
+  void g() {
+    // nullptr can be used as the sentinel value.
+    f(10, nullptr);
+  }
+}
+
+namespace test3 {
+  void f(const char*, ...) __attribute__((format(printf, 1, 2)));
+
+  void g() {
+    // Don't warn when using nullptr with %p.
+    f("%p", nullptr);
+  }
+}
+
+static_assert(__is_scalar(nullptr_t), "");
+static_assert(__is_pod(nullptr_t), "");
+static_assert(sizeof(nullptr_t) == sizeof(void*), "");
+
+static_assert(!(nullptr < nullptr), "");
+static_assert(!(nullptr > nullptr), "");
+static_assert(  nullptr <= nullptr, "");
+static_assert(  nullptr >= nullptr, "");
+static_assert(  nullptr == nullptr, "");
+static_assert(!(nullptr != nullptr), "");
+
+static_assert(!(0 < nullptr), "");
+static_assert(!(0 > nullptr), "");
+static_assert(  0 <= nullptr, "");
+static_assert(  0 >= nullptr, "");
+static_assert(  0 == nullptr, "");
+static_assert(!(0 != nullptr), "");
+
+static_assert(!(nullptr < 0), "");
+static_assert(!(nullptr > 0), "");
+static_assert(  nullptr <= 0, "");
+static_assert(  nullptr >= 0, "");
+static_assert(  nullptr == 0, "");
+static_assert(!(nullptr != 0), "");
+
+namespace overloading {
+  int &f1(int*);
+  float &f1(bool);
+
+  void test_f1() {
+    int &ir = (f1)(nullptr);
+  }
+
+  struct ConvertsToNullPtr {
+    operator nullptr_t() const;
+  };
+
+  void test_conversion(ConvertsToNullPtr ctn) {
+    (void)(ctn == ctn);
+    (void)(ctn != ctn);
+    (void)(ctn <= ctn);
+    (void)(ctn >= ctn);
+    (void)(ctn < ctn);
+    (void)(ctn > ctn);
+  }
+}
+
+namespace templates {
+  template<typename T, nullptr_t Value>
+  struct X { 
+    X() { ptr = Value; }
+
+    T *ptr;
+  };
+  
+  X<int, nullptr> x;
+
+
+  template<int (*fp)(int), int* p, int A::* pmd, int (A::*pmf)(int)>
+  struct X2 {};
+  
+  X2<nullptr, nullptr, nullptr, nullptr> x2;
+}
+
+namespace null_pointer_constant {
+
+// Pending implementation of core issue 903, ensure we don't allow any of the
+// C++11 constant evaluation semantics in null pointer constants.
+struct S { int n; };
+constexpr int null() { return 0; }
+void *p = S().n; // expected-error {{cannot initialize}}
+void *q = null(); // expected-error {{cannot initialize}}
+
+}