简介

定义

成员函数

简介

hash_set类是外部STL中的类，用于向收集器中存储或快速检索数据。收集器中的这些数据唯一，且数值充当关键字。

定义

template <

class Key,

class Traits=hash_compare<Key, less<Key> >,

class Allocator=allocator<Key>

>

class hash_set

成员函数

begin　Returns an iterator that addresses the first element in the hash_set.

clear　Erases all the elements of a hash_set.

count　Returns the number of elements in a hash_set whose key matches a parameter-specified key.

empty　Tests if a hash_set is empty.

end　Returns an iterator that addresses the location succeeding the last element in a hash_set.

equal_range　Returns a pair of iterators respectively to the first element in a hash_set with a key that is greater than a specified key and to the first element in the hash_set with a key that is equal to or greater than the key.

erase　Removes an element or a range of elements in a hash_set from specified positions or removes elements that match a specified key.

find　Returns an iterator addressing the location of an element in a hash_set that has a key equivalent to a specified key.

get_allocator　Returns a copy of the allocator object used to construct the hash_set.

insert　Inserts an element or a range of elements into a hash_set.

key_comp　Retrieves a copy of the comparison object used to order keys in a hash_set.

lower_bound　Returns an iterator to the first element in a hash_set with a key that is equal to or greater than a specified key.

max_size　Returns the maximum length of the hash_set.

rbegin　Returns an iterator addressing the first element in a reversed hash_set.

rend　Returns an iterator that addresses the location succeeding the last element in a reversed hash_set.

size　Returns the number of elements in the hash_set.

swap　Exchanges the elements of two hash_sets.

upper_bound　Returns an iterator to the first element in a hash_set that with a key that is equal to or greater than a specified key.

value_comp　Retrieves a copy of the hash traits object used to hash and order element key values in a hash_set.