#include <folly/Conv.h>
#include <folly/Optional.h>
#include <folly/Range.h>
+#include <folly/Utility.h>
#include <folly/gen/Core.h>
/**
}
};
-class Identity {
-public:
- template<class Value>
- auto operator()(Value&& value) const ->
- decltype(std::forward<Value>(value)) {
- return std::forward<Value>(value);
- }
-};
-
/**
* Class and helper function for negating a boolean Predicate
*/