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  1. #include <iostream>
  2. #include <string>
  3.  
  4. //environment global
  5. struct environment_t {
  6. 	const char* const path = std::getenv("PATH");
  7. 	const char* const home = std::getenv("HOME");
  8. 	const char* const shell = std::getenv("SHELL");
  9. 	const char* const logname = std::getenv("LOGNAME");
  10. 	const char* const uid = std::getenv("UID");
  11. 	const char* const hostname = std::getenv("HOSTNAME");
  12. 	const char* const mail = std::getenv("MAIL");
  13. 	const char* const editor = std::getenv("EDITOR");
  14. 	const char* const temp = std::getenv("TEMP");
  15. protected:
  16. 	environment_t()=default;
  17. };
  18. const environment_t& env() {
  19.    static const environment_t values = {};
  20.    return values;
  21. }
  22.  
  23. // derived globals
  24. const std::string& app_data_directory() {
  25.     static const std::string value(env().home + std::string("app/data"));
  26.     return value;
  27. }
  28.  
  29. // safe and easy!
  30. int main() {
  31.     std::cout << app_data_directory();
  32. }
Success #stdin #stdout 0.01s 5500KB
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/home/ymi9sTapp/data
https://ideone.com/TrbpW0
language:
C++14 (gcc 8.3)
created:
2 years ago
visibility:
secret

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