/*
# nullptr
C++11 keyword.
Better alternative to `0` and `NULL` ugliness:
http://stackoverflow.com/questions/1282295/what-exactly-is-nullptr
# nullptr_t
Type of nullptr.
*/
#include "common.hpp"
int main() {
#if __cplusplus >= 201103L
// No address can be nullptr
{
std::nullptr_t p = nullptr;
int i;
// g++ 4.7 warning: &i will never be null. Smart.
//assert(&i != p);
}
// It is possible to convert NULL and 0 to nullptr_t.
{
std::nullptr_t p;
p = NULL;
p = 0;
}
/*
It is not possible to convert nullptr_t to NULL and 0
This allows to overload a function for both pointer and integer.
In that case, passing it a `0` would always select the integer version.
*/
{
//int i = nullptr;
}
// Unlike in NULL, the size of nullptr_t is fixed.
{
assert(sizeof(std::nullptr_t) == sizeof(void*));
}
#endif
}