#define GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))

#include "adt/foreach.h"
#include "adt/nullptr.h"
#include "adt/logs.h"

#define return_unless(cond)             \
  do {                                  \
    if (!(cond))                        \
      { LOG ("error") << #cond << '\n'; \
        return; }                       \
  } while (0)

#define return_val_unless(cond, val)    \
  do {                                  \
    if (!(cond))                        \
      { LOG ("error") << #cond << '\n'; \
        return val; }                   \
  } while (0)