consider Evil Mode

[glathoud]

The sortedSearch example shows the suffering of having a great tool like new Function(...) but no access to the local context.

Until JS has tools similar to D's template mixins and string mixins, we might consider an optional activation of the One Evil Thing.

For more background, see the discussion on comp.lang.javascript.

Result

Added a .getImplEval method to support eval, as in:

    // First "declare" all functions so that co-dependencies can be
    // solved.
    //
    // Use `mfunD` to debug
    var improveFirst = mfun( improveFirst )
    ,   improveLast  = mfun( improveFirst, improveLast )
    ;
    
    // Now we can implement them, using evil access to the local
    // lexical scope so that we do not need to write parameters
    // repeatedly 5 times (see above `function sortedSearch(...)`).
    improveFirst = eval( improveFirst.getEvalImpl() );
    improveLast  = eval( improveLast.getEvalImpl() );

For a complete use case see sorted_search_local about here

[glathoud]

The first thing would be to check the current behaviour of The Evil One in the current JS engines.

[glathoud]

Maybe it's cleaner and easier to do the "half thing", as in:

function sortedSearch(sortedArray, x, /*?fun?*/less, /*?fun?*/equal)
{
     // ....
      return improveFirst(  // UNCHANGED
            sortedArray, x, less, equal, isFirstFound, isLastFound
            , first_found, last_found, i, j, imax, jmin
        );
}

// ...

   // --- Private details

    function improveFirst(  // UNCHANGED
        sortedArray, x, less, equal, isFirstFound, isLastFound
        , first_found, last_found, i, j, imax, jmin
    )
    {
 // ...
  return mret(  // CHANGED
            improveLast
            , fext.__inputArgs__
        );
    }

for a partial use we could also have return mret( otherFun, a, b, c, fext.__restInputArgs__ );

Thanks to Julio Di Egidio for his inspiring comment.

[glathoud]

won't do it for now

[glathoud]

won't do the argument macros either, impossible to implement in debug mode

[glathoud]

Actually did it, including support for debug mode :)

See top comment of #11, and sorted_search_local use case about here