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  1. #include <iostream>
  2. #include <sstream>
  3.  
  4. class Logger : public std::ostringstream
  5. {
  6. public:
  7. 	~Logger()
  8. 	{
  9. 		std::cout << this->str() << std::endl;
  10. 	}
  11.  
  12. 	Logger& stream()
  13. 	{
  14. 		return *this;
  15. 	}
  16. };
  17.  
  18. int main( int argc, char ** argv )
  19. {
  20. 	// 1. 
  21. 	// Prints an address, e.g. 0x106e89d5c.
  22. 	Logger() << "foo";
  23.  
  24. 	// 2. 
  25. 	// Works as expected.
  26. 	Logger().stream() << "foo";
  27.  
  28. 	// What is the difference between 1. and 2.?
  29.  
  30. 	return 0;
  31. }
  32.  
Success #stdin #stdout 0s 3232KB
comments (?)
stdin
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Standard input is empty
stdout
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foo
foo
https://ideone.com/cPgn4k
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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