Return an iterator to the first element, or end if empty.

Synopsis

Declared in <bslstl_set.h>

set<KEY, COMPARATOR, ALLOCATOR>::iterator
begin() noexcept;

Description

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

Return Value

modifiable iterator to the first element, or end()

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