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  1. #include <vector>
  2. #include <iostream>
  3. #include <algorithm>
  4.  
  5. using namespace std;
  6.  
  7. struct Trace
  8. {
  9. 	Trace() 						{ cout << "X()\n"; }
  10. 	~Trace() 						{ cout << "~X()\n"; }
  11. 	Trace(Trace const &)			{ cout << "X(X&)\n"; }
  12. 	Trace(Trace&&)					{ cout << "X(X&&)\n"; }
  13. 	void operator=(Trace const &) 	{ cout << "X::op=(X&)\n"; }
  14. 	void operator=(Trace &&) 		{ cout << "X::op=(X&&)\n"; }
  15. };
  16.  
  17. struct Big
  18. {
  19. 	vector<int> vec;
  20. 	Big(size_t n): vec(n) {}
  21. 	bool operator<(Big const &r) const { return vec.size() < r.vec.size(); }
  22.  
  23. 	Trace trace;
  24. };
  25.  
  26. template<typename T>
  27. T mmin( std::initializer_list<T> x )
  28. {
  29. 	return * std::min_element( x.begin(), x.end() );
  30. }
  31.  
  32. template<typename T, typename... Args> T vmin( T arg1, Args&&... args )
  33. {
  34. 	T *p[] = { &arg1, &args... };
  35.  
  36. 	return **std::min_element( begin(p), end(p), 
  37. 				[](T *a, T *b) { return *a < *b; } );
  38. }
  39.  
  40. Big make_big(size_t n) { return Big(n); }
  41.  
  42. int main()
  43. {
  44. 	Big a(100), b(200);
  45.  
  46. 	Big const &t = 
  47. 	//min<Big>({ make_big(400), b , a , make_big(600) })
  48. 	//mmin<Big>({ make_big(400), b , a , make_big(600) })
  49. 	vmin<Big>( make_big(400), b , a , make_big(600) )
  50. 	;
  51.  
  52. 	cout << t.vec.size() << endl;
  53. }
  54.  
Success #stdin #stdout 0s 3228KB
comments (?)
stdin 
Standard input is empty
stdout 
X()
X()
X()
X()
X(X&)
~X()
~X()
100
~X()
~X()
~X()
https://ideone.com/IfOL44
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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