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Difference between revisions of "cpp/string/basic string/rbegin"

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< cpp‎ | string‎ | basic string
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reverse_iterator rbegin();
 
reverse_iterator rbegin();
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reverse_iterator rbegin() noexcept;
 
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constexpr reverse_iterator rbegin() noexcept;
 
 
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const_reverse_iterator rbegin() const;
 
const_reverse_iterator rbegin() const;
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const_reverse_iterator rbegin() const noexcept;
 
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constexpr const_reverse_iterator rbegin() const noexcept;
 
 
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const_reverse_iterator crbegin() const noexcept;
 
const_reverse_iterator crbegin() const noexcept;
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constexpr const_reverse_iterator crbegin() const noexcept;
 
 
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Returns a reverse iterator to the first character of the reversed string. It corresponds to the last character of the non-reversed string.  
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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}}
 
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===Complexity===
 
===Complexity===
 
Constant.
 
Constant.
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===Notes===
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libc++ backports {{tt|crbegin()}} to C++98 mode.
  
 
===Example===
 
===Example===
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{{dsc inc|cpp/string/basic_string_view/dsc rbegin}}
 
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Latest revision as of 17:35, 22 June 2024

 
C++
 
Strings library
 
std::basic_string
Member functions
(C++23)
Element access
(DR*)
(DR*)
(C++17)
Iterators
(C++11)
(C++11)
basic_string::rbeginbasic_string::crbegin
(C++11)
(C++11)
Capacity
(DR*)
Modifiers
(C++23)
(DR*)
(C++23)
(C++23)
(C++23)  
Search
Operations
(C++20)
(C++20)
(C++23)
Constants
Non-member functions
(C++20)(C++20)
I/O
Comparison
(until C++20)(until C++20)(until C++20)(until C++20)(until C++20)(C++20)
Numeric conversions
(C++11)(C++11)(C++11)
(C++11)(C++11)
(C++11)(C++11)(C++11)
(C++11)
(C++11)
Literals
(C++14)
Helper classes
(C++11)
Deduction guides (C++17)

 
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.

range-rbegin-rend.svg

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) [edit]
returns a reverse iterator to the beginning
(public member function of std::basic_string_view<CharT,Traits>) [edit]
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