unreachable.hh

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#ifndef UNREACHABLE_HH
#define UNREACHABLE_HH
 
#include <utility>
 
#if defined(NDEBUG)
  #define UNREACHABLE std::unreachable()
 
#else
  // asserts enabled
  // One some platforms, like MinGW, the compiler cannot determine that
  // assert(false) will never return, so we help it by wrapping the assert
  // in an infinite loop.
  #include <cassert>
  #define UNREACHABLE while (1) assert(false)
 
#endif
 
#endif // UNREACHABLE_HH