Hi,
The documentation at Adding and Modifying Elements in a Map helpfully shows the syntax for changing a value in a map or adding a new value. It also explains that these expressions can fail, and so must be in a failure context.
What is the scenario for adding an element to a map to fail? I’m asking both on general knowledge, but also from the perspective of what failure handling would be appropriate on insertion failure.
It’s because of some random technical constraint related to nested property mutating, see Ask Epic: Verse - March 28 @ 10:00 AM ET - #119 by UltimateLambda
Thank you, that is just what I was looking for - I also see your comment further down that thread, little chuckle from me because “out of memory” and “concurrency” were two cases I was guessing at when trying to intuit the cause of this failure.
(Just conversationally, I am new to verse so I maybe am misunderstanding the syntax, but it seems a little funny to me for that to be a run-time error. I would have expected it to be a compilation error that the struct is not fully assigned, if that is a requirement.)
Verse is still very immature, we’re only testers at this stage, so yeah some things don’t make sense, given that they’re doing a very different language, but it has great features too