Namespaces
Variants

std::basic_string_view<CharT,Traits>:: remove_suffix

From cppreference.net
C++
Strings library
std::basic_string_view
constexpr void remove_suffix ( size_type n ) ;
(since C++17)

Moves the end of the view back by n characters.

If n > size ( ) is true , the behavior is undefined.

(until C++26)

If n > size ( ) is true :

  • If the implementation is hardened , a contract violation occurs. Moreover, if the contract-violation handler returns under “observe” evaluation semantic, the behavior is undefined.
  • If the implementation is not hardened, the behavior is undefined.
(since C++26)

Contents

Parameters

n - number of characters to remove from the end of the view

Complexity

Constant.

Example

Run this code 
#include <iostream>
#include <string_view>
int main()
{
    char arr[] = {'a', 'b', 'c', 'd', '\0', '\0', '\0'};
    std::string_view v(arr, sizeof arr);
    auto trim_pos = v.find('\0');
    if (trim_pos != v.npos)
        v.remove_suffix(v.size() - trim_pos);
    std::cout << "Array: '" << arr << "', size=" << sizeof arr << '\n'
              << "View : '" << v << "', size=" << v.size() << '\n';
}

Output: 

Array: 'abcd', size=7
View : 'abcd', size=4

See also

shrinks the view by moving its start forward
(public member function)