Breakage wish list

[matklad]

• set should return Result<&T, T>

• maybe align naming with option?

  • get
  • insert
  • get_or_insert
  • get_or_insert_with
  • try_get_or_insert_with

• alternative

  • get
  • set
  • get_or_set
  • get_or_set_with
  • try_get_or_set_with

[matklad]

I've though about it, and came to the conclusion that we shouldn't do that

• set returning () is less surprising and can be more convenient in, for example, match arms, where you need (). If someone needs &T, we can add insert method.

• regarding naming, while get / set / init name are not really orthogonal, they do a good job explaining semantically what's going on: in config.get_or_init it's clear-er that init is called at most once. With config.get_or_set_with it's not so.