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  1. #include <unordered_set>
  2. #include <iostream>
  3.  
  4. struct someType{
  5.     std::string name;
  6.     int code;
  7. };
  8.  
  9. int main() {
  10.     auto hash = [](const someType& st){
  11.         return std::hash<std::string>()(st.name) * 31 + std::hash<int>()(st.code);
  12.     };
  13.     auto equal = [](const someType& st1, const someType& st2){
  14.         return st1.name == st2.name && st1.code == st2.code;
  15.     };
  16.     std::unordered_set<someType, decltype(hash), decltype(equal)> myset(8, hash, equal);
  17.  
  18.     myset.insert({ "aaa", 123 });
  19.     myset.insert({ "bbb", 321 });
  20.     myset.insert({ "ccc", 213 });
  21.  
  22.     for (auto const &st : myset)
  23.         std::cout << st.name.c_str() << ", " << st.code << std::endl;
  24.  
  25.     return 0;
  26. }
Success #stdin #stdout 0s 15240KB
comments (?)
stdin 
Standard input is empty
stdout 
ccc, 213
bbb, 321
aaa, 123
https://ideone.com/7r8KDe
language:
C++ (gcc 8.3)
created:
5 years ago
visibility:
secret

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