Return an iterator to the first element of this set.

Synopsis

Declared in <bslstl_unorderedset.h>

unordered_set<KEY, HASH, EQUAL, ALLOCATOR>::iterator
begin() noexcept;

Description

Return an iterator providing modifiable access to the first value_type object (in the sequence of value_type objects) maintained by this set, or the end iterator if this set is empty.

Return Value

iterator to the first element, or end() if empty

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