Provided by: libstdc++-8-doc_8.4.0-1ubuntu1~18.04_all 

NAME
std::experimental::nullopt_t - Tag type to disengage optional objects.
SYNOPSIS
Public Types
enum _Construct { _Token }
Public Member Functions
constexpr nullopt_t (_Construct)
Detailed Description
Tag type to disengage optional objects.
Definition at line 92 of file optional.
Author
Generated automatically by Doxygen for libstdc++ from the source code.
libstdc++ Tue Mar 10 2020 std::experimental::nullopt_t(3cxx)