OPERATOR_DELETE_PLACEMENT.cpp

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// checking for operator delete (void*, void*)
 
 
#include "config.h"
 
#include <stddef.h>
 
#ifdef _RWSTD_NO_EXCEPTION_SPECIFICATION
#  define throw()
#endif   // _RWSTD_NO_EXCEPTION_SPECIFICATION
 
 
#ifndef _RWSTD_NO_HONOR_STD
#  ifdef _RWSTD_NO_STD_TERMINATE
#    include "terminate.h"
#  endif   // _RWSTD_NO_STD_TERMINATE
#endif   // _RWSTD_NO_HONOR_STD
 
 
void operator delete (void*, void*) throw ();
 
void foo (void *p0, void *p1) throw () { ::operator delete (p0, p1); }
 
void (*operator_delete)(void*, void*);
 
 
int dtor_calls;
 
struct S {
    int dummy_;
 
    ~S () { ++dtor_calls; }
};
 
 
int main (int argc, char *argv[])
{
    (void)&argv;
 
    int result = 0;
 
    char buf [sizeof (S) + 32];
 
    void *p0 = buf;
 
    ::operator delete (p0, p0);
 
    if (0 != dtor_calls)
        result = (result << 1) + 1;
 
    if (argc > 1)
        operator_delete = &operator delete;
    else
        operator_delete = &foo;
 
    operator_delete (p0, p0);
 
    if (0 != dtor_calls)
        result = (result << 1) + 1;
 
    // prevent compilers from optimizing the code above away
    // without actually ever using the result (unless the
    // test is invoked with command line arguments)
    if (argc > 1)
        return result;
 
    return 0;
}