Function Overloading

[Gaurav Negi]

On Tuesday, 31 October 2023 at 20:09:44 UTC, Salih Dincer wrote:
> ```d
> struct Calculate
> {
>     int memory;
>     string result;
>
>     auto toString() => result;
>
>     this(string str)
>     {
>         add(str);
>     }
>
>     this(int num)
>     {
>         add(num);
>     }
>
>     import std.string : format;
>
>     void add(string str)
>     {
>         result ~= str.format!"%s + ";
>     }
>
>     void add(int num)
>     {
>         memory += num;
>         add(num.format!"%s");
>     }
> }
>
> import std.stdio;
> void main()
> {
>     // without constructor:
>     Calculate c;
>     c.add("x");
>     c.add(2);
>     c.writeln; // x + 2 +
>     
>     // with constructor:
>     c = Calculate("x");
>     c.add(2);
>     c.writeln; // x + 2 +
> }
> ```
>
> There is a simple struct like the one above that is not related 
> to reality. There can be more than 2 function overloading in 
> it, but in our example there are only 2. Without implementing a 
> similar function again for each constructor; is it possible to 
> do something like `alias add = this;`?
>
> ```d
> struct Calculate
> {
>     int memory;
>     string result;
>
>     auto toString() => result;
>
>     // alias add = this;
>     
>     import std.string : format;
>
>     this(string str)
>     {
>         result ~= str.format!"%s + ";
>     }
>
>     this(int num)
>     {
>         memory += num;
>         add(num.format!"%s");
>     }
> }
> ```
>
> SDB at 79

Can you modify your code with the below code I hope you can get 
what you are looking for.


     struct Calculate
     {
         int memory;
         string result;

         auto toString() => result;

         private void addCommon(string str)
         {
             result ~= str.format!"%s + ";
         }

         import std.string : format;

         this(string str)
         {
             addCommon(str);
         }

         this(int num)
         {
             memory += num;
             addCommon(num.format!"%s");
         }
     }


Thanks