Difference between revisions of "cpp/string/basic string/rbegin"
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< cpp | string | basic string
m (merge noexcept, numbering) |
m (fmt.) |
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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}} | ||
| − | {{ | + | {{dcla|anchor=no|num=1|noexcept=c++11|constexpr=c++20| |
reverse_iterator rbegin(); | reverse_iterator rbegin(); | ||
| − | |||
| − | |||
}} | }} | ||
| − | {{ | + | {{dcla|anchor=no|num=2|noexcept=c++11|constexpr=c++20| |
const_reverse_iterator rbegin() const; | const_reverse_iterator rbegin() const; | ||
| − | |||
| − | |||
}} | }} | ||
| − | {{ | + | {{dcla|anchor=no|num=3|since=c++11|constexpr=c++20| |
const_reverse_iterator crbegin() const noexcept; | const_reverse_iterator crbegin() const noexcept; | ||
}} | }} | ||
{{dcl end}} | {{dcl end}} | ||
| − | Returns a reverse iterator to the first character of the reversed string. It corresponds to the last character of the non-reversed string. | + | Returns a reverse iterator to the first character of the reversed string. It corresponds to the last character of the non-reversed string. |
{{image|range-rbegin-rend.svg}} | {{image|range-rbegin-rend.svg}} | ||
| Line 25: | Line 21: | ||
===Return value=== | ===Return value=== | ||
| − | + | Reverse iterator to the first character. | |
===Complexity=== | ===Complexity=== | ||
| − | Constant | + | Constant. |
| + | |||
| + | ===Notes=== | ||
| + | libc++ backports {{tt|crbegin()}} to C++98 mode. | ||
===Example=== | ===Example=== | ||
{{example | {{example | ||
| − | | code= | + | |code= |
| − | + | ||
#include <algorithm> | #include <algorithm> | ||
| + | #include <iostream> | ||
#include <iterator> | #include <iterator> | ||
#include <string> | #include <string> | ||
| Line 48: | Line 47: | ||
std::cout << c << '\n'; // "yralpmexE" | std::cout << c << '\n'; // "yralpmexE" | ||
} | } | ||
| − | | output= | + | |output= |
Exemplary | Exemplary | ||
yralpmexE | yralpmexE | ||
| Line 54: | Line 53: | ||
===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 rbegin}} | ||
{{dsc end}} | {{dsc end}} | ||
{{langlinks|de|es|fr|it|ja|pt|ru|zh}} | {{langlinks|de|es|fr|it|ja|pt|ru|zh}} | ||
Latest revision as of 17:35, 22 June 2024
reverse_iterator rbegin(); |
(1) | (noexcept since C++11) (constexpr since C++20) |
const_reverse_iterator rbegin() const; |
(2) | (noexcept since C++11) (constexpr since C++20) |
const_reverse_iterator crbegin() const noexcept; |
(3) | (since C++11) (constexpr 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 |
[edit] Parameters
(none)
[edit] Return value
Reverse iterator to the first character.
[edit] Complexity
Constant.
[edit] Notes
libc++ backports crbegin() to C++98 mode.
[edit] 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
[edit] 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>)
|
