cpp-game-engine/util/expect.hpp

//
//  require.hpp
//  gameutils
//
//  Created by Sam Jaffe on 8/19/16.
//

#pragma once

#include <stdexcept>

#include "macro.h"

inline namespace precondition {
  template <typename except>
  void _expect(bool expr, char const * message) {
    if (!expr) throw except{message};
  }
}

#if defined( __clang__ ) || defined( __GNUC__ )
# define LOCATION_INFO ". in " STRING(__PRETTY_FUNCTION__) "(" __FILE__ ":" STRING(__LINE__) ")"
#elif defined( _MSC_VER )
# define LOCATION_INFO ". in " __FUNCTION__ "(" __FILE__ ":" STRING(__LINE__) ")"
#else
# define LOCATION_INFO ". in " __FILE__ ":" STRING(__LINE__)
#endif

#define error_msg(expr, msg) msg ": " #expr LOCATION_INFO

#define expects(expr, msg) expects_e(expr, std::logic_error, msg)
#define expects_e(expr, except, msg) precondition::_expect<except>( expr, error_msg(expr, msg) )