c++ join/split code snippet

Here are 3 codes snippet implementing string join and string split using C++ 11/14/17.

To use it, just include split_join.h or copy paste the function you want, there's no external dependencies, you can even rename it as your convenience.

You can also adapt it to work with basic_string only or force to return a vector.

string_join

Will join/merge/aggregate string/string_view with a separator and return the result into a string Exemple :

  vector<string> Vector1{ "C++","is","fun!" };
  string res1 = string_join(Vector1, " ");
  cout << "string_join(Vector1,' ') => " << res1 << endl;

Result : "C++ is fun!"

Works also with wstring

  vector<wstring> Vectorw1{ L"C++",L"is",L"widely",L"fun!" };
  wstring wres1 = string_join(Vectorw1, L" ");
  wcout << L"string_join(Vectorw1,' ') => " << wres1 << endl;

string_split

Will split/tokenize a string/string_view in multiple string/string_view in a collection/container

  vector<string> Vector2;
  string_split(string("C++ 17 will be fun!"), string(" "), Vector2);
  cout << "string_split  =>" << string_join(Vector2, "_") << endl;

Result : "C++_17_will_be_fun!" // I use string_join to display easily

Another syntax using return, specify input string type and output a template parameter on call

  auto Vector3 = string_split<string, vector<string> >("C++ 17 will be fun! by return", " ");
  cout << "string_split  =>" << string_join(Vector3, "_") << endl;

Result : C++_17_will_be_fun!_by_return

See main_demo.cpp for more examples.

Tested Compiler

Code running on VS2013/2015/2017 In order to have GCC working with string_view on C++ 17 Beta phase, it will require this extra code Else it works fine on GCC 4.9

using namespace std::experimental;
// Quick fix required to run on GCC , standard seems to cover it
// basic_string& operator+=( std::basic_string_view<CharT, Traits> sv);
string& operator+=(string &str,string_view sv){
    str+=string(sv);
    return str;
}