Sergey Alexandrov taketwo

## keybase.md

      
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                taketwo
                / keybase.md
            
            
              Created
              October 22, 2017 12:22
            
          
    Keybase proof

I hereby claim:

I am taketwo on github.
I am alexandrov (https://keybase.io/alexandrov) on keybase.
I have a public key ASBxy3fFjxH0eYlEyB9wID155PCSPNioAuApKqPaPful_wo

To claim this, I am signing this object:

  
## has_method_def.h
// Create a metafunction "has_xxx_method" that can be used
// to check if a class has a method called "xxx". Note the
// limitation: only existence of parameterless methods can
// be checked this way.
// Credits: http://stackoverflow.com/a/21827727/1525865
#define HAS_METHOD_DEF(xxx)                              \
  template<typename T>                                   \
  constexpr auto has_ ## xxx ## _method(int)             \
  -> decltype(std::declval<T>(). xxx (), bool())         \
  { return true; }                                       \
	// Create a metafunction "has_xxx_method" that can be used
	// to check if a class has a method called "xxx". Note the
	// limitation: only existence of parameterless methods can
	// be checked this way.
	// Credits: http://stackoverflow.com/a/21827727/1525865
	#define HAS_METHOD_DEF(xxx) \
	template<typename T> \
	constexpr auto has_ ## xxx ## _method(int) \
	-> decltype(std::declval<T>(). xxx (), bool()) \
	{ return true; } \