objective/lib/objective/error.js

UNDER CONSTRUCTION

function ObjectiveError() {

  var frames, e = Error.apply(this, arguments);

  Object.defineProperty(this, 'name',    {value: 'ObjectiveError', configurable: true})
  Object.defineProperty(this, 'message', {value: e.message, configurable: true})
  Object.defineProperty(this, 'frames',  {get:function(){return frames}, configurable: true});
  Object.defineProperty(this, 'stack',   {get:function() {return e.stack}, configurable: true});
  
  var origPrepareStackTrace = Error.prepareStackTrace;
  Error.prepareStackTrace = function(e, stack){return stack;}
  try {
    frames = Error.apply(this, arguments).stack.map(function(frame){
      return {
        native: frame.isNative(),
        file: frame.getFileName(),
        line: frame.getLineNumber(),
        colm: frame.getColumnNumber(),
        fn: frame.getFunction(),

        frame: frame
        // https://code.google.com/p/v8-wiki/wiki/JavaScriptStackTraceApi
        //
        // frame.getThis:         returns the value of this
        // frame.getTypeName:     returns the type of this as a string. This is the name of the 
        //                        function stored in the constructor field of this, if available, 
        //                        otherwise the object's [[Class]] internal property.
        // frame.getFunction:     returns the current function
        // frame.getFunctionName: returns the name of the current function, typically its name property. 
        //                        If a name property is not available an attempt will be made to try to 
        //                        infer a name from the function's context.
        // frame.getMethodName:   returns the name of the property of this or one of its prototypes that 
        //                        holds the current function
        // frame.getFileName:     if this function was defined in a script returns the name of the script
        // frame.getLineNumber:   if this function was defined in a script returns the current line number
        // frame.getColumnNumber: if this function was defined in a script returns the current column number
        // frame.getEvalOrigin:   if this function was created using a call to eval returns a CallSite object 
        //                        representing the location where eval was called
        // frame.isToplevel:      is this a toplevel invocation, that is, is this the global object?
        // frame.isEval:          does this call take place in code defined by a call to eval?
        // frame.isNative:        is this call in native V8 code?
        // frame.isConstructor:   is this a constructor call?
        //
      }
    });
    frames.shift();  // Don't need original error constructor.
    frames.shift(); // Don't need this extended constructor.
                   // frame[0] is now the caller to error
  } finally {
    Error.prepareStackTrace = origPrepareStackTrace;
  }
  return this;
}

ObjectiveError.prototype = Error.prototype;
ObjectiveError.prototype.constructor = ObjectiveError;


global.ObjectiveError = ObjectiveError;