| CARVIEW |
Select Language
HTTP/1.1 301 Moved Permanently
Server: nginx
Date: Sat, 19 Jul 2025 14:29:20 GMT
Content-Type: text/html; charset=UTF-8
Transfer-Encoding: chunked
Connection: keep-alive
Location: /reference/set/set/cbegin/
HTTP/1.1 200 OK
Server: nginx
Date: Sat, 19 Jul 2025 14:29:20 GMT
Content-Type: text/html; charset=utf-8
Transfer-Encoding: chunked
Connection: keep-alive
ETag: W/"759f-791nvA0L5CmPeCtLTrifY9vddCQ"
Content-Encoding: gzip
Returns a const_iterator pointing to the first element in the container.
All iterators in set containers are constant iterators (including both const_iterator and iterator member types). These cannot be used to modify the contents they point to, but can be increased and decreased normally (unless they are themselves also const).
If the container is empty, the returned iterator value shall not be dereferenced.
Member type const_iterator is a bidirectional iterator type that points to const elements.
Output:
Concurrently accessing the elements of a set is safe.
The copy construction or assignment of the returned iterator is also guaranteed to never throw.
Reference
C library:
- <cassert> (assert.h)
- <cctype> (ctype.h)
- <cerrno> (errno.h)
-
<cfenv> (fenv.h)C++11
- <cfloat> (float.h)
-
<cinttypes> (inttypes.h)C++11
- <ciso646> (iso646.h)
- <climits> (limits.h)
- <clocale> (locale.h)
- <cmath> (math.h)
- <csetjmp> (setjmp.h)
- <csignal> (signal.h)
- <cstdarg> (stdarg.h)
-
<cstdbool> (stdbool.h)C++11
- <cstddef> (stddef.h)
-
<cstdint> (stdint.h)C++11
- <cstdio> (stdio.h)
- <cstdlib> (stdlib.h)
- <cstring> (string.h)
-
<ctgmath> (tgmath.h)C++11
- <ctime> (time.h)
-
<cuchar> (uchar.h)C++11
- <cwchar> (wchar.h)
- <cwctype> (wctype.h)
Containers:
-
<array>C++11
- <deque>
-
<forward_list>C++11
- <list>
- <map>
- <queue>
- <set>
- <stack>
-
<unordered_map>C++11
-
<unordered_set>C++11
- <vector>
-
Input/Output:
Multi-threading:
-
<atomic>C++11
-
<condition_variable>C++11
-
<future>C++11
-
<mutex>C++11
-
<thread>C++11
-
Other:
- <algorithm>
- <bitset>
-
<chrono>C++11
-
<codecvt>C++11
- <complex>
- <exception>
- <functional>
-
<initializer_list>C++11
- <iterator>
- <limits>
- <locale>
- <memory>
- <new>
- <numeric>
-
<random>C++11
-
<ratio>C++11
-
<regex>C++11
- <stdexcept>
- <string>
-
<system_error>C++11
-
<tuple>C++11
-
<type_traits>C++11
-
<typeindex>C++11
- <typeinfo>
- <utility>
- <valarray>
set
- set::~set
- set::set
member functions
- set::begin
-
set::cbeginC++11
-
set::cendC++11
- set::clear
- set::count
-
set::crbeginC++11
-
set::crendC++11
-
set::emplaceC++11
-
set::emplace_hintC++11
- set::empty
- set::end
- set::equal_range
- set::erase
- set::find
- set::get_allocator
- set::insert
- set::key_comp
- set::lower_bound
- set::max_size
- set::operator=
- set::rbegin
- set::rend
- set::size
- set::swap
- set::upper_bound
- set::value_comp
non-member overloads
public member function
<set>
std::set::cbegin
const_iterator cbegin() const noexcept;
Return const_iterator to beginning
All iterators in set containers are constant iterators (including both const_iterator and iterator member types). These cannot be used to modify the contents they point to, but can be increased and decreased normally (unless they are themselves also const).
If the container is empty, the returned iterator value shall not be dereferenced.
Parameters
noneReturn Value
A const_iterator to the beginning of the sequence.Member type const_iterator is a bidirectional iterator type that points to const elements.
Example
|
|
Output:
myset contains: 10 20 25 50 60 |
Complexity
Constant.Iterator validity
No changes.Data races
The container is accessed.Concurrently accessing the elements of a set is safe.
Exception safety
No-throw guarantee: this member function never throws exceptions.The copy construction or assignment of the returned iterator is also guaranteed to never throw.
See also
- set::begin
- Return iterator to beginning (public member function)
- set::cend
- Return const_iterator to end (public member function)
- set::crbegin
- Return const_reverse_iterator to reverse beginning (public member function)
Home page | Privacy policy
© cplusplus.com, 2000-2025 - All rights reserved - v3.3.4s
Spotted an error? contact us
© cplusplus.com, 2000-2025 - All rights reserved - v3.3.4s
Spotted an error? contact us