pvdz.ee - 11.2.4 Argument Lists

The argument production, when evaluated, always returns an (internal) List with zero or more items.

Arguments : ( )

Code: (Meta Ecma)

function evaluate(( )) {
  return new List();
}

Arguments : ( ArgumentList )

Code: (Meta Ecma)

function evaluate(( ArgumentList )) {
  return evaluate(ArgumentList);
}

ArgumentList : AssignmentExpression

Code: (Meta Ecma)

function evaluate(AssignmentExpression) {
  var ref = evaluate(AssignmentExpression);
  var arg = GetValue(ref);
  return new List(arg);
}

ArgumentList : AssignmentList , AssignmentExpression

Code: (Meta Ecma)

function evaluate(AssignmentList , AssignmentExpression) {
  var precedingArgs = evaluate(ArgumentList);
  var ref = evaluate(AssignmentExpression);
  var arg = GetValue(ref);
  precedingArgs.push(arg); // although the spec kind of expects a new list here...
  return precedingArgs;
}