std::basic_string_view<CharT,Traits>::remove_prefix (3) - Linux Manuals

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

NAME

std::basic_string_view<CharT,Traits>::remove_prefix - std::basic_string_view<CharT,Traits>::remove_prefix

Synopsis

constexpr void remove_prefix(size_type n); (since C++17)

Moves the start of the view forward by n characters.
The behavior is undefined if n > size().

Parameters

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

Return value

(none)

Complexity

Constant.

Example

// Run this code

  #include <iostream>
  #include <algorithm>
  #include <string_view>
  int main()
  {
      std::string str = " trim me";
      std::string_view v = str;
      v.remove_prefix(std::min(v.find_first_not_of(" "), v.size()));
      std::cout << "String: '" << str << "'\n"
                << "View : '" << v << "'\n";
  }

Output:

  String: ' trim me'
  View : 'trim me'