public Binder prepareBinder() {
SmartBinder binder = SmartBinder.from(signature);
// prepare arg[]
if (arity == -1) {
// do nothing, already have IRubyObject[] in args
} else if (arity == 0) {
binder = binder.insert(argOffset, "args", IRubyObject.NULL_ARRAY);
} else {
binder = binder.collect("args", "arg[0-9]+");
}
// add block if needed
if (signature.lastArgType() != Block.class) {
binder = binder.append("block", Block.NULL_BLOCK);
}
// bind to site
binder = binder.insert(0, "site", this);
return binder.binder();
}
