Difference between revisions of "cpp/string/basic string/rbegin"
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< cpp | string | basic string
m (→See also: + crosslink) |
Andreas Krug (Talk | contribs) m (Capitalized 1st letter, ., headers sorted) |
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| − | {{cpp/string/basic_string/title | rbegin | crbegin}} | + | {{cpp/string/basic_string/title|rbegin|crbegin}} |
{{cpp/string/basic_string/navbar}} | {{cpp/string/basic_string/navbar}} | ||
{{dcl begin}} | {{dcl begin}} | ||
| − | {{dcl rev multi | num=1 | until1=c++11 | dcl1= | + | {{dcl rev multi|num=1|until1=c++11|dcl1= |
reverse_iterator rbegin(); | reverse_iterator rbegin(); | ||
| − | | until2=c++20 | dcl2= | + | |until2=c++20|dcl2= |
reverse_iterator rbegin() noexcept; | reverse_iterator rbegin() noexcept; | ||
| − | | dcl3= | + | |dcl3= |
constexpr reverse_iterator rbegin() noexcept; | constexpr reverse_iterator rbegin() noexcept; | ||
}} | }} | ||
| − | {{dcl rev multi | num=2 | until1=c++11 | dcl1= | + | {{dcl rev multi|num=2|until1=c++11|dcl1= |
const_reverse_iterator rbegin() const; | const_reverse_iterator rbegin() const; | ||
| − | | until2=c++20 | dcl2= | + | |until2=c++20|dcl2= |
const_reverse_iterator rbegin() const noexcept; | const_reverse_iterator rbegin() const noexcept; | ||
| − | | dcl3= | + | |dcl3= |
constexpr const_reverse_iterator rbegin() const noexcept; | constexpr const_reverse_iterator rbegin() const noexcept; | ||
}} | }} | ||
| − | {{dcl rev multi | num=3 | + | {{dcl rev multi|num=3 |
| − | | since1=c++11 | dcl1= | + | |since1=c++11|dcl1= |
const_reverse_iterator crbegin() const noexcept; | const_reverse_iterator crbegin() const noexcept; | ||
| − | | since2=c++20 | dcl2= | + | |since2=c++20|dcl2= |
constexpr const_reverse_iterator crbegin() const noexcept; | constexpr const_reverse_iterator crbegin() const noexcept; | ||
}} | }} | ||
| Line 32: | Line 32: | ||
===Return value=== | ===Return value=== | ||
| − | + | Reverse iterator to the first character. | |
===Complexity=== | ===Complexity=== | ||
| − | Constant | + | Constant. |
===Example=== | ===Example=== | ||
{{example | {{example | ||
| − | | code= | + | |code= |
| − | + | ||
#include <algorithm> | #include <algorithm> | ||
| + | #include <iostream> | ||
#include <iterator> | #include <iterator> | ||
#include <string> | #include <string> | ||
| Line 55: | Line 55: | ||
std::cout << c << '\n'; // "yralpmexE" | std::cout << c << '\n'; // "yralpmexE" | ||
} | } | ||
| − | | output= | + | |output= |
Exemplary | Exemplary | ||
yralpmexE | yralpmexE | ||
| Line 61: | Line 61: | ||
===See also=== | ===See also=== | ||
| − | |||
{{dsc begin}} | {{dsc begin}} | ||
| − | {{dsc inc | cpp/string/basic_string/dsc rend}} | + | {{dsc inc|cpp/string/basic_string/dsc rend}} |
| − | {{dsc inc | cpp/string/basic_string_view/dsc {{SUBPAGENAMEE}}}} | + | {{dsc inc|cpp/string/basic_string_view/dsc {{SUBPAGENAMEE}}}} |
{{dsc end}} | {{dsc end}} | ||
{{langlinks|de|es|fr|it|ja|pt|ru|zh}} | {{langlinks|de|es|fr|it|ja|pt|ru|zh}} | ||
Revision as of 10:01, 2 June 2023
| (1) | ||
reverse_iterator rbegin(); |
(until C++11) | |
| reverse_iterator rbegin() noexcept; |
(since C++11) (until C++20) |
|
| constexpr reverse_iterator rbegin() noexcept; |
(since C++20) | |
| (2) | ||
const_reverse_iterator rbegin() const; |
(until C++11) | |
| const_reverse_iterator rbegin() const noexcept; |
(since C++11) (until C++20) |
|
| constexpr const_reverse_iterator rbegin() const noexcept; |
(since C++20) | |
| (3) | ||
const_reverse_iterator crbegin() const noexcept; |
(since C++11) (until C++20) |
|
| constexpr const_reverse_iterator crbegin() const noexcept; |
(since C++20) | |
Returns a reverse iterator to the first character of the reversed string. It corresponds to the last character of the non-reversed string.
Contents |
Parameters
(none)
Return value
Reverse iterator to the first character.
Complexity
Constant.
Example
Run this code
#include <algorithm> #include <iostream> #include <iterator> #include <string> int main() { std::string s("Exemplar!"); *s.rbegin() = 'y'; std::cout << s << '\n'; // "Exemplary" std::string c; std::copy(s.crbegin(), s.crend(), std::back_inserter(c)); std::cout << c << '\n'; // "yralpmexE" }
Output:
Exemplary yralpmexE
See also
| (C++11) |
returns a reverse iterator to the end (public member function) |
| returns a reverse iterator to the beginning (public member function of std::basic_string_view<CharT,Traits>)
|
