2021-09-06

Merge #10161

10161: Don't dump `DefMap`s to build the panic context r=matklad a=matklad

internal: remove accidental code re-use
FragmentKind played two roles:

* entry point to the parser
* syntactic category of a macro call

These are different use-cases, and warrant different types. For example,
macro can't expand to visibility, but we have such fragment today.

This PR introduces `ExpandsTo` enum to separate this two use-cases.

I suspect we might further split `FragmentKind` into `$x:specifier` enum
specific to MBE, and a general parser entry point, but that's for
another PR!

bors r+
🤖

Co-authored-by: Aleksey Kladov <[email protected]>