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c++variant

How to convert variant to string in C++

I'm new in C++, and I wanted to know how to convert a variant to string:

variant<string, int, float> value;

if (!value.empty()) {
   // do something
}
Solution

  • Well, you will need custom code for the different cases... The following function would do as you want:

    string stringify(variant<string, int, float> const& value) {
    if(int const* pval = std::get_if<int>(&value))
      return to_string(*pval);
     
    if(float const* pval = std::get_if<float>(&value))
      return to_string(*pval);
    
    return get<string>(value);
}