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  1. #include <iostream>
  2. #include <type_traits>
  3. #include <string>
  4.  
  5. template<typename Str, typename = std::enable_if_t<!std::is_const<std::remove_reference_t<Str>>::value>>
  6. Str StringReplace(Str&& str, const std::remove_reference_t<Str>& from, const std::remove_reference_t<Str>& to)
  7. {
  8. 	std::cout << "non-const" << std::endl;
  9. 	std::cout << __PRETTY_FUNCTION__ << std::endl;
  10.     return std::forward<Str>(str);
  11. }
  12.  
  13. template<typename Str, typename = std::enable_if_t<std::is_const<std::remove_reference_t<Str>>::value>>
  14. std::decay_t<Str> StringReplace(Str&& str, const std::remove_reference_t<Str>& from, const std::remove_reference_t<Str>& to)
  15. {
  16. 	std::cout << "const" << std::endl;
  17. 	std::cout << __PRETTY_FUNCTION__ << std::endl;
  18.     std::decay_t<Str> mutableStr{std::forward<Str>(str)};
  19.     StringReplace(mutableStr, from, to);
  20.     return mutableStr;
  21. }
  22.  
  23. int main()
  24. {
  25.     {
  26.         std::cout << "lvalue" << std::endl;
  27.         std::string v;
  28.         StringReplace(v, "", "");
  29.     }
  30.  
  31.     {
  32.         std::cout << std::endl << "const lvalue" << std::endl;
  33.         const std::string v;
  34.         StringReplace(v, "", "");
  35.     }
  36.  
  37.     {
  38.         std::cout << std::endl << "lvalue reference" << std::endl;
  39.         std::string v;
  40.         std::string& vref = v;
  41.         StringReplace(vref, "", "");
  42.     }
  43.  
  44.     {
  45.         std::cout << std::endl << "const lvalue reference" << std::endl;
  46.         std::string v;
  47.         const std::string& vref = v;
  48.         StringReplace(vref, "", "");
  49.     }
  50.  
  51.     {
  52.         std::cout << std::endl << "rvalue" << std::endl;
  53.         std::string v;
  54.         StringReplace(std::move(v), "", "");
  55.     }
  56.  
  57.     {
  58.         std::cout << std::endl << "const rvalue" << std::endl;
  59.         const std::string v;
  60.         StringReplace(std::move(v), "", "");
  61.     }
  62.  
  63.     {
  64.         std::cout << std::endl << "rvalue reference" << std::endl;
  65.         std::string&& v = std::string();
  66.         StringReplace(v, "", "");
  67.     }
  68.  
  69.     {
  70.         std::cout << std::endl << "const rvalue reference" << std::endl;
  71.         const std::string&& v = std::string();
  72.         StringReplace(v, "", "");
  73.     }
  74.  
  75.     {
  76.         std::cout << std::endl << "string literal" << std::endl;
  77.         StringReplace<std::string>("", "", "");
  78.     }
  79.  
  80. 	return 0;
  81. }
Success #stdin #stdout 0s 4348KB
comments (?)
stdin 
Standard input is empty
stdout 
lvalue
non-const
Str StringReplace(Str&&, std::remove_reference_t<Str>&, std::remove_reference_t<Str>&) [with Str = std::__cxx11::basic_string<char>&; <template-parameter-1-2> = void; std::remove_reference_t<Str> = std::__cxx11::basic_string<char>]

const lvalue
const
std::decay_t<Str> StringReplace(Str&&, std::remove_reference_t<Str>&, std::remove_reference_t<Str>&) [with Str = const std::__cxx11::basic_string<char>&; <template-parameter-1-2> = void; std::decay_t<Str> = std::__cxx11::basic_string<char>; std::remove_reference_t<Str> = const std::__cxx11::basic_string<char>]
non-const
Str StringReplace(Str&&, std::remove_reference_t<Str>&, std::remove_reference_t<Str>&) [with Str = std::__cxx11::basic_string<char>&; <template-parameter-1-2> = void; std::remove_reference_t<Str> = std::__cxx11::basic_string<char>]

lvalue reference
non-const
Str StringReplace(Str&&, std::remove_reference_t<Str>&, std::remove_reference_t<Str>&) [with Str = std::__cxx11::basic_string<char>&; <template-parameter-1-2> = void; std::remove_reference_t<Str> = std::__cxx11::basic_string<char>]

const lvalue reference
const
std::decay_t<Str> StringReplace(Str&&, std::remove_reference_t<Str>&, std::remove_reference_t<Str>&) [with Str = const std::__cxx11::basic_string<char>&; <template-parameter-1-2> = void; std::decay_t<Str> = std::__cxx11::basic_string<char>; std::remove_reference_t<Str> = const std::__cxx11::basic_string<char>]
non-const
Str StringReplace(Str&&, std::remove_reference_t<Str>&, std::remove_reference_t<Str>&) [with Str = std::__cxx11::basic_string<char>&; <template-parameter-1-2> = void; std::remove_reference_t<Str> = std::__cxx11::basic_string<char>]

rvalue
non-const
Str StringReplace(Str&&, std::remove_reference_t<Str>&, std::remove_reference_t<Str>&) [with Str = std::__cxx11::basic_string<char>; <template-parameter-1-2> = void; std::remove_reference_t<Str> = std::__cxx11::basic_string<char>]

const rvalue
const
std::decay_t<Str> StringReplace(Str&&, std::remove_reference_t<Str>&, std::remove_reference_t<Str>&) [with Str = const std::__cxx11::basic_string<char>; <template-parameter-1-2> = void; std::decay_t<Str> = std::__cxx11::basic_string<char>; std::remove_reference_t<Str> = const std::__cxx11::basic_string<char>]
non-const
Str StringReplace(Str&&, std::remove_reference_t<Str>&, std::remove_reference_t<Str>&) [with Str = std::__cxx11::basic_string<char>&; <template-parameter-1-2> = void; std::remove_reference_t<Str> = std::__cxx11::basic_string<char>]

rvalue reference
non-const
Str StringReplace(Str&&, std::remove_reference_t<Str>&, std::remove_reference_t<Str>&) [with Str = std::__cxx11::basic_string<char>&; <template-parameter-1-2> = void; std::remove_reference_t<Str> = std::__cxx11::basic_string<char>]

const rvalue reference
const
std::decay_t<Str> StringReplace(Str&&, std::remove_reference_t<Str>&, std::remove_reference_t<Str>&) [with Str = const std::__cxx11::basic_string<char>&; <template-parameter-1-2> = void; std::decay_t<Str> = std::__cxx11::basic_string<char>; std::remove_reference_t<Str> = const std::__cxx11::basic_string<char>]
non-const
Str StringReplace(Str&&, std::remove_reference_t<Str>&, std::remove_reference_t<Str>&) [with Str = std::__cxx11::basic_string<char>&; <template-parameter-1-2> = void; std::remove_reference_t<Str> = std::__cxx11::basic_string<char>]

string literal
non-const
Str StringReplace(Str&&, std::remove_reference_t<Str>&, std::remove_reference_t<Str>&) [with Str = std::__cxx11::basic_string<char>; <template-parameter-1-2> = void; std::remove_reference_t<Str> = std::__cxx11::basic_string<char>]
https://ideone.com/d2Tpkf
language:
C++14 (gcc 8.3)
created:
6 years ago
visibility:
public

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