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  1. #include <memory>
  2.  
  3. #define new new_is_deprecated_resort_to_new_unique_new_shared_or_new_unsafe new
  4. #define resolve_new_is_deprecated_resort_to_new_unique_new_shared_or_new_unsafe
  5.  
  6. #define resolve_xx(x) resolve_##x
  7. #define resolve_x(x) resolve_xx(x)
  8.  
  9. #define operator_new operator resolve_x(new)
  10. #define new_unsafe resolve_x(new)
  11.  
  12. struct new_unique_tag { };
  13. template <typename T> std::unique_ptr<T> operator *(new_unique_tag, T* p) { return std::unique_ptr<T>(p); }
  14. struct new_unique_array_tag { };
  15. template <typename T> std::unique_ptr<T []> operator *(new_unique_array_tag, T* p) { return std::unique_ptr<T []>(p); }
  16.  
  17. #define new_unique new_unique_tag() * new_unsafe
  18. #define new_unique_array new_unique_array_tag() * new_unsafe
  19.  
  20. struct test_custom_alloc
  21. {
  22.     void* operator new_unsafe(size_t size)
  23. 	{
  24. 		return ::operator new_unsafe(size);
  25. 	}
  26. };
  27.  
  28. int main()
  29. {
  30. 	auto test1 = new_unsafe int;
  31. 	auto test2 = new_unique int;
  32. 	(void) test1;
  33. 	(void) test2;
  34. 	return 0;
  35. }
  36.  
  37. int main_doinitwrong()
  38. {
  39. 	auto test = new int;
  40. 	(void) test;
  41. 	return 0;
  42. }
  43.  
Compilation error #stdin compilation error #stdout 0s 0KB
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stdin
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Standard input is empty
compilation info 
prog.cpp: In function ‘int main_doinitwrong()’:
prog.cpp:3:13: error: ‘new_is_deprecated_resort_to_new_unique_new_shared_or_new_unsafe’ was not declared in this scope
 #define new new_is_deprecated_resort_to_new_unique_new_shared_or_new_unsafe new
             ^
prog.cpp:39:14: note: in expansion of macro ‘new’
  auto test = new int;
              ^
stdout
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Standard output is empty
https://ideone.com/agWsO3
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
secret

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