Static constant string (class member)

Question

Static constant string (class member)

I'd like to have a private static constant for a class (in this case a shape-factory).

I'd like to have something of the sort.

class A {

   private:

      static const string RECTANGLE = "rectangle";

}

This discloses to me that this kind of part configuration isn't agreeable with the norm. How would you have a private strict consistent (or maybe open) without utilizing a #define order (I need to stay away from the ugliness of information globality!)

Any help is appreciated.

class string

4 years ago by Amit8z4mc

3 Answers

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**espadacoder11** · Answer 1 · 2021-06-21T13:51:28

espadacoder11

In C++11 you can do now:



class A {

 private:

  static constexpr const char* STRING = "some useful string constant";

};

4 years ago

**pankajshivnani123** · Answer 2 · 2021-06-23T07:05:23

In C++ 17 you can use inline variables:

class A {

 private:

  static inline const std::string my_string = "some useful string constant";

};

Note that this is different from espadacoder11 answer: This one defines an actual std::string object, not a const char*

**RoliMishra** · Answer 3 · 2021-06-30T12:33:47

This is just extra information, but if you really want the string in a header file, try something like:

class foo

{

public:

    static const std::string& RECTANGLE(void)

    {

        static const std::string str = "rectangle";



        return str;

    }

};

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Static constant string (class member)

3 Answers

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