Defines a generic function that trims trailing whitespace. - C++ STL

C++ examples for STL:string

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Description

Defines a generic function that trims trailing whitespace.

Demo Code

#include <string>
#include <iostream>
#include <cctype>
#include <cwctype>

using namespace std;

template<typename T, typename F>
void rtrimws(basic_string<T>& s, F f) {

   if (s.empty())
      return;// w ww  .java2 s  . com

   typename basic_string<T>::iterator p;
   for (p = s.end(); p != s.begin() && f(*--p););

   if (!f(*p))
      p++;

   s.erase(p, s.end());
}

// Overloads to make cleaner calling for client code
void rtrimws(string& s) {
   rtrimws(s, isspace);
}

void rtrimws(wstring& ws) {
   rtrimws(ws, iswspace);
}

int main() {

   string s = "test        ";
   wstring ws = L"test        ";

   rtrimws(s);
   rtrimws(ws);

   cout << s << "|\n";
   wcout << ws << L"|\n";
}

Result


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