On Wednesday, 10 May 2017 at 13:27:17 UTC, k-five wrote:
Thanks, but I know about what are you saying. The user_apply[4] has so many possibilities and I cannot use if-else
That doesn't sound right. Either you've already handled all the possible cases and thus expect the to! to not throw (can specify that i.e. via std.exception.assumeWontThrow), or, as you're saying, it's much more than an if-else, but in that case exception will be thrown on invalid input.
