How to create map in c++ and be able to search for function and call it?

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予麋鹿 2021-01-01 15:25

I\'m trying to create a map of string and method in C++, but I don\'t know how to do it. I would like to do something like that (pseudocode):

map


      
      
        
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                   粉色の甜心
                                             
                
                
                (楼主)
            
              
              
                2021-01-01 16:04
              

            
            
                        
Well, I'm not a member of the popular here Boost Lovers Club, so here it goes - in raw C++.

#include 
#include 

struct Math
{
    double sinFunc(double x) { return 0.33; };
    double cosFunc(double x) { return 0.66; };
};

typedef double (Math::*math_method_t)(double);
typedef std::map math_func_map_t;

int main()
{

    math_func_map_t mapping;
    mapping["sin"] = &Math::sinFunc;
    mapping["cos"] = &Math::cosFunc;

    std::string function = std::string("sin");
    math_func_map_t::iterator x = mapping.find(function);
    int result = 0;

    if (x != mapping.end()) {
        Math m;
        result = (m.*(x->second))(20);
    }
}


That's obviously if I have understood correctly that you want a method pointer, not a function/static method pointer.
    
             
                                                        
            
            
              
                
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