function evaluate( src, opts, filename, dirname, clbk ) {
	var context;
	var tmp;
	var fcn;
	var err;
	var id;

	// Create an id:
	id = minstd();

	// Create an execution context:
	context = createContext( done );

	// Generate the source code to evaluate...
	if ( opts.asynchronous ) {
		src = asyncSource( id, src, opts );
	} else {
		src = syncSource( id, src, opts );
	}
	// Compile the source code:
	fcn = compile( filename, src );

	// Execute the source code:
	tmp = fcn.call( context, require, filename, dirname );

	// Check that the snippet did not prematurely return...
	if ( tmp !== id ) {
		err = new Error( 'evaluation error. Unable to retrieve evaluation results. Ensure that the provided snippet does not return prematurely.' );
		return done( err );
	}
	/**
	* Callback invoked upon executing source code.
	*
	* @private
	* @param {(Error|null)} error - error object
	* @param {NonNegativeIntegerArray} results - results
	* @returns {void}
	*/
	function done( error, results ) {
		if ( error ) {
			return clbk( error );
		}
		return clbk( null, results );
	}
}
Evaluates source code within a V8 virtual machine context.

@private
@param {string} src - source code
@param {Object} opts - options
@param {string} filename - filename
@param {string} dirname - directory name
@param {Callback} clbk - callback to invoke upon completion
@returns {void}