[mamon]

First of all, they cannot force you to give them your current salary. My standard answer to such question is a slightly more polite version of "it's none of your bussiness". And if they don't want to provide a salary range, and ask you to come up with the number, then just give them your current salary +50% and see how they react. Of course you might then need to step down a little, and accept your current salary + 20-30% instead, but that's still pretty good.

[mlthoughts2018]

They won’t try to force you. They’ll just lowball the first offer, and if you say “that’s not close to what I’m seeking” then they’ll say, “well we can’t read your mind, so it’s unreasonable for you to expect us to just repeatedly guess until we hit the number you want, so you need to outline your expectations.”

If you still decline to discuss a range of expectations at that point, they will usually just drop interest in you and decline to interview you further, assuming that you might just be fishing for a high offer to use to negotiate somewhere else, or that you want way more than they could possibly offer, etc.

[jerven]

Thing is in many cases their low ball offer might still be more than you thought you could get. It gives a lower line, on their terms. From there you can negotiate upwards. After all it is their first offer.