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  1. #include <iostream>
  2. #include <string>
  3.  
  4. struct UserString {
  5.     const char* p;
  6. 	operator const char*() const {
  7. 		std::cout << "! " << __FUNCTION__ << std::endl;
  8. 		return p;
  9. 	}
  10.  
  11. 	UserString()
  12. 	: p ("UserString")
  13. 	{ }
  14. };
  15.  
  16. struct WUserString {
  17. 	const wchar_t* p;
  18. 	operator const wchar_t*() const {
  19. 		std::cout << "! " << __FUNCTION__ << std::endl;
  20. 		return p;
  21. 	}
  22.  
  23. 	WUserString()
  24. 	: p (L"WUserString")
  25. 	{ }
  26. };
  27.  
  28.  
  29. int main() {
  30. 	using namespace std;
  31. 	cout << "String Literal" << endl;
  32. 	cout << string("std::string") << endl;
  33. 	cout << UserString() << endl;
  34. 	cout << static_cast<const char*>(UserString()) << endl;
  35.  
  36. 	wcout << L"WString Literal" << endl;
  37. 	wcout << wstring(L"std::wstring") << endl;
  38. 	wcout << WUserString() << endl;
  39. 	wcout << static_cast<const wchar_t*>(WUserString()) << endl;
  40.  
  41. 	return 0;
  42. }
  43.  
Success #stdin #stdout 0s 3032KB
comments (?)
stdin
copy 
Standard input is empty
stdout
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String Literal
std::string
! operator const char*
UserString
! operator const char*
UserString
WString Literal
std::wstring
! operator const wchar_t*
0x80491b0
! operator const wchar_t*
WUserString
https://ideone.com/doSHvq
language:
C++ (gcc 8.3)
created:
10 years ago
visibility:
public

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