In D, we call the two functions "assert" and "enforce". The point is that assert is the wrong term; to say "assert(condition)" says "I assert that condition sho

In D, we call the two functions "assert" and "enforce". The point is that assert is the wrong term; to say "assert(condition)" says "I assert that condition should hold here". If there's an input event that causes condition to be false then your assert is not just false but wrong, since you assert something that is not necessarily true.