std::basic_string<CharT,Traits,Allocator>::erase
| (1) | ||
basic_string& erase( size_type index = 0, size_type count = npos ); |
(until C++20) | |
constexpr basic_string& erase( size_type index = 0, size_type count = npos ); |
(since C++20) | |
| (2) | ||
iterator erase( iterator position ); |
(until C++11) | |
iterator erase( const_iterator position ); |
(since C++11) (until C++20) |
|
constexpr iterator erase( const_iterator position ); |
(since C++20) | |
| (3) | ||
iterator erase( iterator first, iterator last ); |
(until C++11) | |
iterator erase( const_iterator first, const_iterator last ); |
(since C++11) (until C++20) |
|
constexpr iterator erase( const_iterator first, const_iterator last ); |
(since C++20) |
Removes specified characters from the string.
2) Removes the character at
position.
3) Removes the characters in the range
[first, last).
Parameters
| index | - | first character to remove |
| count | - | number of characters to remove |
| position | - | iterator to the character to remove |
| first, last | - | range of the characters to remove |
Return value
1)
*this
2) iterator pointing to the character immediately following the character erased, or
end() if no such character exists
3) iterator pointing to the character
last pointed to before the erase, or
end() if no such character exists
Exceptions
2-3) Throws nothing.
In any case, if an exception is thrown for any reason, this function has no effect (strong exception guarantee). (since C++11).
Example
#include <algorithm>
#include <iostream>
#include <iterator>
#include <string>
int main()
{
std::string s = "This Is An Example";
std::cout << "1) " << s << '\n';
s.erase(7, 3); // erases " An" using overload (1)
std::cout << "2) " << s << '\n';
s.erase(std::find(s.begin(), s.end(), ' ')); // erases first ' '; overload (2)
std::cout << "3) " << s << '\n';
s.erase(s.find(' ')); // trims from ' ' to the end of the string; overload (1)
std::cout << "4) " << s << '\n';
auto it = std::next(s.begin(), s.find('s')); // obtains iterator to the first 's'
s.erase(it, std::next(it, 2)); // erases "sI"; overload (3)
std::cout << "5) " << s << '\n';
}
Output:
1) This Is An Example 2) This Is Example 3) ThisIs Example 4) ThisIs 5) This
See also
| clears the contents (public member function) |
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