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  1. #include <iostream>
  2.  
  3.  
  4. enum ConvFactor {
  5. 	HZ = 1,
  6. 	KHZ = 1000,
  7. 	MHZ = 1000000,
  8. 	GHZ = 1000000000
  9. };
  10.  
  11. template <ConvFactor CF>
  12. class Frequency
  13. {
  14. public:
  15. 	explicit Frequency(double val)
  16. 		: val_(val / CF)
  17. 	{
  18. 		std::cout << "  CF: " << CF << std::endl;
  19. 	}
  20.  
  21. 	template<ConvFactor LocalCF>
  22. 	explicit Frequency(Frequency<LocalCF> const & freq)
  23. 		: val_((freq.Val() * LocalCF) / CF)
  24. 	{
  25. 		std::cout << "LocalCF: " << LocalCF << "  CF: " << CF << std::endl;
  26. 	}
  27.  
  28. 	//template<ConvFactor CF>
  29. 	Frequency<CF> operator*(double mult)
  30. 	{
  31. 		return Frequency<CF>(val_ * mult);
  32. 	}
  33.  
  34. 	double Val() const { return val_; }
  35. 	double operator()() { return val_; }
  36.  
  37. private:
  38. 	double val_;
  39. };
  40.  
  41. typedef Frequency<HZ>   Hz;
  42. typedef Frequency<KHZ> KHz;
  43. typedef Frequency<MHZ> MHz;
  44. typedef Frequency<GHZ> GHz;
  45.  
  46.  
  47.  
  48. template<ConvFactor CF>
  49. Frequency<CF> doSomething(Frequency<CF> freq)
  50. {
  51. //	return Frequency<CF>(freq * 2.0);
  52. 	return (freq * 2.0);
  53. }
  54.  
  55. //KHz doSomething2(KHz khz)
  56. //{
  57. //	return khz *<KHZ> 2.0;
  58. //}
  59.  
  60. int main()
  61. {
  62. 	Hz hz = Hz(1000);
  63.  
  64. 	KHz khz = KHz(hz);
  65.  
  66. 	khz = KHz( doSomething<KHZ>(khz) );
  67. //	khz = doSomething2(khz);
  68.  
  69. 	MHz mhz1 = MHz(hz);
  70. 	MHz mhz2 = MHz(khz);
  71.  
  72. 	GHz ghz1 = GHz(hz);
  73. 	GHz ghz2 = GHz(khz);
  74. 	GHz ghz3 = GHz(mhz1);
  75. 	GHz ghz4 = GHz(mhz2);
  76.  
  77. 	khz = doSomething(KHz(mhz2));
  78.  
  79. 	std::cout << hz() << " " << khz() << " " << mhz2() << " " << " " << ghz1() << std::endl;
  80. }
Success #stdin #stdout 0s 16064KB
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Standard input is empty
stdout
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  CF: 1
LocalCF: 1  CF: 1000
  CF: 1000
LocalCF: 1  CF: 1000000
LocalCF: 1000  CF: 1000000
LocalCF: 1  CF: 1000000000
LocalCF: 1000  CF: 1000000000
LocalCF: 1000000  CF: 1000000000
LocalCF: 1000000  CF: 1000000000
LocalCF: 1000000  CF: 1000
  CF: 1000
1000 4e-06 2e-06  1e-06
https://ideone.com/aDD1iR
language:
C++ (gcc 8.3)
created:
6 years ago
visibility:
public

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