__gnu_pbds::null_type(3) Library Functions Manual __gnu_pbds::null_type(3)

__gnu_pbds::null_type - Represents no type, or absence of type, for template tricks.

#include <tag_and_trait.hpp>

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.

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