bors 6b1a2a9c3e Auto merge of #3648 - phansch:const_fn_lint, r=oli-obk
Add initial version of const_fn lint

This adds an initial version of a lint that can tell if a function could be `const`.

TODO:

- [x] Finish up the docs
- [x] Fix the ICE

cc #2440
2019-01-29 19:58:13 +00:00
..
2019-01-26 11:10:13 +02:00