Merge #8124

8124: Add basic lifetime completion r=Veykril a=Veykril

This adds basic lifetime completion, basic in the sense that the completions for lifetimes are only shown when the user enters `'` followed by a char. Showing them when nothing is entered is kind of a pain, as we would want them to only show up where they are useful which in turn requires a lot of tree traversal and cursor position checking to verify whether the position is valid for a lifetime. This in itself doesn't seem too bad as usually when you know you want to write a lifetime putting `'` to ask for lifetime completions seems fine.

~~I'll take a look at whether its possible to lift the restriction of having to put a char after `'`.~~ This actually already works so I guess this is the clients responsibility, in which case VSCode doesn't like it.

![TYH9gIlyVo](https://user-images.githubusercontent.com/3757771/111886437-c9b02f80-89cd-11eb-9bee-340f1536b0de.gif)


Co-authored-by: Lukas Wirth <[email protected]>

0 files changed, 0 insertions, 0 deletions