cocorobolx/python/skulpt/src/method.js

/**
 * @constructor
 *
 * co_varnames and co_name come from generated code, must access as dict.
 */
Sk.builtin.method = function (func, self, klass) {
    if (!(this instanceof Sk.builtin.method)) {
        Sk.builtin.pyCheckArgs("method", arguments, 3, 3);
        if (!Sk.builtin.checkCallable(func)) {
            throw new Sk.builtin.TypeError("First argument must be callable");
        }
        if (self.ob$type === undefined) {
            throw new Sk.builtin.TypeError("Second argument must be object of known type");
        }
        return new Sk.builtin.method(func, self, klass);
    }
    this.im_func = func;
    this.im_self = self;
    this.im_class = klass;
    this["$d"] = {
        im_func: func,
        im_self: self,
        im_class: klass
    };
};
goog.exportSymbol("Sk.builtin.method", Sk.builtin.method);
Sk.abstr.setUpInheritance("instancemethod", Sk.builtin.method, Sk.builtin.object);

Sk.builtin.method.prototype.tp$call = function (args, kw) {
    goog.asserts.assert(this.im_self, "should just be a function, not a method since there's no self?");
    goog.asserts.assert(this.im_func instanceof Sk.builtin.func);

    // 'args' and 'kw' get mucked around with heavily in applyOrSuspend();
    // changing it here is OK.
    args.unshift(this.im_self);

    // A method call is just a call to this.im_func with 'self' on the beginning of the args.
    // Do the necessary.

    return this.im_func.tp$call(args, kw);
};

Sk.builtin.method.prototype["$r"] = function () {
    var name = (this.im_func.func_code && this.im_func.func_code["co_name"] && this.im_func.func_code["co_name"].v) || "<native JS>";
    return new Sk.builtin.str("<bound method " + this.im_self.ob$type.tp$name + "." + name +
        " of " + this.im_self["$r"]().v + ">");
};