syntax_data: {"ast_node_type":"other","tokens":[{"end":65,"kind":"keyword","start":0,"text":"mir::Const::Unevaluated(uv,"}]}
source_snippet:             mir::Const::Unevaluated(uv, ty) => (uv.shrink(), ty),
context_before:         let (uv, ty) = match constant.const_ {
context_after:             mir::Const::Ty(_, c) => match c.kind() {