warning5.c

来自「Mac OS X 10.4.9 for x86 Source Code gcc」· C语言 代码 · 共 26 行

// { dg-do run  }
// { dg-options "-Wall" }
// PRMS Id: 5135
// Bug: g++ complains that the result of the new expression is not used.

extern "C" int printf (const char *, ...);
inline void * operator new (__SIZE_TYPE__, void *p) { return p; }

class foo {
public:
  foo() : a(42) {};
  int a;
};

int
main()
{
  char buffer[1024];

  new (buffer) foo;

  foo* pY = (foo *)buffer;

  return pY->a != 42;
}