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  1. #include <vector>
  2. #include <array>
  3.  
  4. struct A
  5. {
  6. 	const unsigned int id;
  7.  
  8. 	std::vector<const A*> predecessors;
  9.  
  10. 	A(unsigned int id) : id(id) {}
  11. 	void setPredecessors(std::vector<const A*> predecessors)  { this->predecessors = predecessors; }
  12. };
  13.  
  14. const std::array<A, 4>& get_registers() {
  15.     static std::array<A, 4> v = 
  16.     {
  17.         A(0),
  18.         A(1),
  19.         A(2),
  20.         A(3),
  21.     };
  22.     if (v[0].predecessors.size()==0) { //initialize it
  23.     	v[0].setPredecessors({&v[1],&v[2]});
  24.     	//etc
  25.     }
  26.     return v;
  27. }
  28.  
  29. const std::array<A, 4>& v = get_registers();
  30. const A &a0 = v[0]; 
  31. const A &a1 = v[1]; 
  32. const A &a2 = v[2]; 
  33. const A &a3 = v[3];
  34.  
  35. int main()
  36. {
  37. 	return 0;
  38. }
Success #stdin #stdout 0s 3012KB
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https://ideone.com/Io5wg
language:
C++14 (gcc 8.3)
created:
13 years ago
visibility:
secret

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