clang/test/SemaCXX/__null.cpp

   1 // RUN: %clang_cc1 -triple x86_64-unknown-unknown %s -Wno-null-conversion -fsyntax-only -verify
   2 // RUN: %clang_cc1 -triple i686-unknown-unknown %s -Wno-null-conversion -fsyntax-only -verify
   3
   4 void f() {
   5   int* i = __null;
   6   i = __null;
   7   int i2 = __null;
   8
   9   // Verify statically that __null is the right size
  10   int a[sizeof(typeof(__null)) == sizeof(void*)? 1 : -1];
  11
  12   // Verify that null is evaluated as 0.
  13   int b[__null ? -1 : 1];
  14 }
  15
  16 struct A {};
  17
  18 void g() {
  19   (void)(0 ? __null : A()); // expected-error {{non-pointer operand type 'A' incompatible with NULL}}
  20   (void)(0 ? A(): __null); // expected-error {{non-pointer operand type 'A' incompatible with NULL}}
  21 }