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  1. #include <complex>
  2. #include <map>
  3.  
  4.  
  5. template<typename T>
  6. struct math_parser{
  7.     static const std::map<std::string, T(*)(const T& )> functions;
  8.  
  9.     void evaluate(){
  10.         functions.begin()->second(T(-1));
  11.     }
  12. };
  13.  
  14.  
  15. template<typename T>
  16. const std::map<std::string, T(*)(const T& )> math_parser<T>::functions = {
  17.     {std::string("SQRT"), (T(*)(const T& ))&std::sqrt}
  18. };
  19.  
  20.  
  21. int main(){
  22.     math_parser<std::complex<long double>> x;
  23.     x.evaluate();
  24. }
  25.  
Success #stdin #stdout 0s 3468KB
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https://ideone.com/ahHUkm
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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