110c3e481c
* handle associated constants and struct literals This aims to fix #100 by adding parsing support for associated constants, and struct literal expressions. It duplicates some of the parsing for constants, but sadly ImplItemConst and ImplConst (as well as their children) don't share a common trait that would allow for genericity. It also uses the same namespace for both constants and associated constants, which could cause conflicts in valid Rust with shared const names in different scopes. The struct literals use the standard C99 syntax. Do mind that the limitations on literal expressions still apply. * added test cases * fix formatting