Macro in JavaScript?

In javascript, if a function creates a function and then returns it, the returned function's scope is relative to where it was created.

I'm wondering if it's possible to have a block of code stored in a variable which acts almost like preprocessor macros in C/C++, but with the difference being it can be treated like a variable? Where, essentially, you create this macro, assign it to a variable, and wherever the macro is executed, the scope of the code is always relative to where it was executed.

An example (not real code):

macro someMacro {
    this.i++

    a++
}

function someFunc() {
    this.i = 0;

    var a = 0;

    console.log(this.i, a) // 0, 0

    someMacro();

    console.log(this.i, a) // 1, 1
}

I saw this question, but that's not quite what I want.

Thanks.