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  1. #include <iostream>
  2. #include <memory>
  3. #include <vector>
  4. #include <functional>
  5.  
  6. class Node
  7. {
  8. public:
  9. 	Node ( std::string name ) : name__ (name){}
  10.  
  11. 	std::string name__;
  12.  
  13. 	bool operator== ( const Node & rhs ) const
  14. 	{
  15. 		return this->name__ == rhs.name__;
  16. 	}
  17. };
  18.  
  19. struct Edge
  20. {
  21. 	std::shared_ptr<Node> from;
  22. 	std::shared_ptr<Node> to;
  23. };
  24.  
  25. int main() 
  26. {
  27. 	auto sky_node  = std::make_shared<Node>( "sky" );
  28.     auto is_node   = std::make_shared<Node>( "is" );
  29.     auto blue_node = std::make_shared<Node>( "blue" );
  30.  
  31. 	std::vector<Edge> edges = { {sky_node, is_node}, {is_node, blue_node} };
  32.  
  33. 	std::function<void ( const std::shared_ptr<Node>, unsigned int )> find_next;
  34. 	find_next = [=]( const std::shared_ptr<Node> node_to, unsigned int len )
  35. 	{
  36.     	for ( const auto rhs : edges )
  37.     	{  
  38.         	if ( (*node_to) == (*rhs.from) ) 
  39.         	{
  40.             	len++;
  41.             	find_next ( rhs.from, len );
  42.         	}
  43.     	}
  44. 	};
  45.  
  46. 	for ( const auto lhs : edges )
  47. 	{
  48.     	unsigned int len = 0;
  49.     	const auto from = lhs.to;
  50.     	find_next ( from, len );
  51. 	}
  52.  
  53. 	return 0;
  54. }
Runtime error #stdin #stdout #stderr 0s 3236KB
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stdin
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Standard input is empty
stdout
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Standard output is empty
stderr
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terminate called after throwing an instance of 'std::bad_function_call'
  what():  bad_function_call
https://ideone.com/983iuy
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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