reference to 'self' inside a function

[Era Scarecrow]

On Tuesday, 17 July 2012 at 22:13:13 UTC, Eyyub wrote:
> On Tuesday, 17 July 2012 at 16:56:17 UTC, angel wrote:
>> I propose to introduce a reference to the current function, 
>> much like 'this' in a class method. Call it 'self' or 
>> 'thisFunc', or whatever ...
>> What might this be good for ?
>> For implementing recursion in a lambda function. Writing in 
>> functional style, one creates many functions, and looking for 
>> reasonable names for these functions becomes unnecessarily 
>> painful.
>
> Good idea !
> "self" is a cute keyword, or "lambda" but this could break 
> existing code.

Mmm.. Why not an inner function to represent the recursive 
function? True a 'self' reference may resolve the issue, and be 
syntactical sugar..

   auto f = function int(int x) {
     //real function body
     void self(int y) {
       if(y) {
         inner(y-1);
         x++;
       }
     }

     self(x); //double x
     self(x); //double it again
     return x;
   }; //end of f declaration

   writeln(10);
   writeln(f(10)); //10*4


  Mmm But using it as a shell although may work wouldn't be useful 
for a simple lambda anymore would it? Who knows, perhaps 'this' 
will extend to lambda's referencing itself.

  Using CTFE you could rebuild and get something similar to that, 
or a template function... Hmmmm... Something to think on...