Binding external functions using the classic syntax

We can also bind external functions with the classic syntax. The classic syntax is a little different from the jsdoc syntax. It uses ## to register functions. A typical registration body is as follows:

##register function_name: function_type
##args(argment_list)
{
    //function body
}

In classic syntax, test2.js will contain the following code:

##opa-type Student
##opa-type list('a)
##extern-type llarray('a)
##register func1: opa[Student] -> void
##args(stu)
{ 
  console.log("func1: "+ stu.name +" , "+stu.sex+", "+stu.age);
}

##register func2: opa[list(string)] -> void
##args(lst)
{ 
    var lst2 = list2js(lst); 
    for(var i=0; i<lst2.length; i++) 
          console.log("func2: " + lst2[i]);
}

##register func3: llarray(int) -> void
##args(arr)
{ 
  for(var i=0; i<arr.length; i++) 
        console.log("func3: " + arr[i]);
}

We can now compile the rewritten file using the following command:

opa test2.js 601.opa --js-bypass...