cpp/utility/functional/not2

is a helper function to create a function object that returns the complement of the binary predicate function passed. The function object created is of type.

The binary predicate type must define two member types, and, that are convertible to the predicate's parameter types. The function objects obtained from std, std, std, std, std, std, std, std, std, std, std, std, std, std, std, std, std, std, std, std, std, std, std, or from another call to std have these types defined, as are function objects derived from the deprecated std.

Return value
returns an object of type, constructed with.

Exceptions
None.