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  1. #include <algorithm>
  2. #include <vector>
  3. #include <iostream>
  4.  
  5.  
  6. template <typename T>
  7. auto firstInactive(const std::vector<T>& v)
  8. -> typename std::vector<T>::const_iterator // for c++11
  9. {
  10.     return std::find_if(v.begin(), v.end(), [](const T& e) { return !e.active; });
  11. }
  12.  
  13. struct ChildTest_1{
  14.     bool active = false;
  15. };
  16.  
  17. struct ChildTest_2{
  18.     bool active = true;
  19. };
  20.  
  21.  
  22. int main()
  23. {
  24.     std::vector<ChildTest_1> allTest1(10);
  25.     std::vector<ChildTest_2> allTest2(10);
  26.  
  27.     allTest1[0].active = true;
  28.     allTest2[4].active = false;
  29.  
  30.     auto it1 = firstInactive(allTest1);
  31.     auto it2 = firstInactive(allTest2);
  32.  
  33.     if (it1 != allTest1.end()) {
  34.         std::cout << "First inactive in alltest1 is "
  35.                   << std::distance(allTest1.cbegin(), it1) << std::endl;
  36.     }
  37.     if (it2 != allTest2.end()) {
  38.         std::cout << "First inactive in alltest2 is "
  39.                   << std::distance(allTest2.cbegin(), it2) << std::endl;
  40.     }
  41. }
Success #stdin #stdout 0s 3468KB
comments (?)
stdin
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Standard input is empty
stdout
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First inactive in alltest1 is 1
First inactive in alltest2 is 4
https://ideone.com/Xy1uXQ
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

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