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  1. #include <iostream>
  2. #include <algorithm>
  3.  
  4. inline bool not_space(char c){
  5.     return c != ' ' && ( 9 > c || c > 13 );
  6. }
  7.  
  8. inline bool my_isspace(char c){
  9.     return std::isspace(static_cast<unsigned char>(c));
  10. }
  11.  
  12. template<typename FN>
  13. auto find_if(std::string & s, FN fn){
  14.     return std::find_if(s.begin(), s.end(), fn);
  15. }
  16. template<typename FN>
  17. auto rfind_if(std::string & s, FN fn){
  18.     return std::find_if(s.rbegin(), s.rend(), fn).base();
  19. }
  20.  
  21. inline void ltrim(std::string &s) {
  22.     s.erase(s.begin(), find_if(s, not_space));
  23. }
  24.  
  25. inline void rtrim(std::string &s) {
  26.     s.erase(rfind_if(s, not_space), s.end());
  27. }
  28.  
  29. void trim(std::string& s){
  30.     ltrim(s);
  31.     rtrim(s);
  32. }
  33.  
  34. std::string trim(std::string&& s){
  35.     trim(s);
  36.     return s;
  37. }
  38.  
  39. int main(){
  40. 	std::string s{"  abc  "};
  41. 	trim(s);
  42. 	std::cout << trim(std::move(s));
  43.     std::cout << '"' << trim(" sdf ") << '"';
  44. }
  45.  
Success #stdin #stdout 0s 5304KB
comments (?)
stdin 
Standard input is empty
stdout 
abc"sdf"
https://ideone.com/G9mAAZ
trim(std::string)
language:
C++14 (gcc 8.3)
created:
5 hours ago
visibility:
public

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