33 #ifndef DART_COMMON_OPTIONAL_HPP_
34 #define DART_COMMON_OPTIONAL_HPP_
36 #if __cplusplus >= 201703L
39 # include <boost/optional.hpp>
45 #if __cplusplus >= 201703L
boost::optional< T > optional
Definition: Optional.hpp:50
Definition: BulletCollisionDetector.cpp:65