In some cases where an implementation should not have bad side effects, I think a panic is more "succinct" (although for every other case Result is really useful and the thing to do). TBH I'm not sure if the case I described qualifies for such an assertion, i.e index access should not have bad side effects.
Return a Result from where? A custom function (trait?) on the vector?
Maybe I can explain my usecase a bit better:
- There's a fxn called with a list = eg
A(mylist: Vec<myitems>) - In
A()I initialize an "index" (mylist_index: usize) which should be constrained to the set of values defined by length ofmylist. A()calls another function passing itmylist& the indexB(mylist, mylist_index).B()can modify the index and access items inmylist. I was thinking if there's a way to avoid splattering index validity checks whenever manipulating the index value or using it to accessmylist.