Provided by: libstdc++-8-doc_8.3.0-23ubuntu2_all
__gnu_pbds::null_type - Represents no type, or absence of type, for template tricks.
Inherited by __gnu_pbds::null_node_update< _Tp1, _Tp2, _Tp3, _Tp4 >.
Represents no type, or absence of type, for template tricks. In a mapped-policy, indicates that an associative container is a set. In a list-update policy, indicates that each link does not need metadata. In a hash policy, indicates that the combining hash function is actually a ranged hash function. In a probe policy, indicates that the combining probe function is actually a ranged probe function. Definition at line 210 of file tag_and_trait.hpp.
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