ensure macro

ensure.h

#pragma once

#include <exception>

#define DEBUG_STRINGIFY(x) #x
#define DEBUG_TO_STRING(x) DEBUG_STRINGIFY(x)
#define DEBUG_LOCATION "file: " __FILE__ ". line: " DEBUG_TO_STRING(__LINE__)

#define THROW_EXCEPTION(MESSAGE) throw std::exception(MESSAGE)

#define NOT_IMPLEMENTED THROW_EXCEPTION("Not implemented yet");

#ifdef DISABLE_ENSURANCES
#define ENSURE2(COND, MESSAGE)
#define ENSURE(COND)
#else
#define ENSURE2(COND, MESSAGE)                                    \
  if (!(COND)) {                                                  \
    THROW_EXCEPTION(MESSAGE ". " DEBUG_LOCATION); \
  }
#define ENSURE(COND) ENSURE2(COND, "condition `" #COND "' fails")
#endif