syntax_data: {"ast_node_type":"import","tokens":[{"end":38,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:                 // on its use as well.
context_before:                 // We've emitted an error on the original const, it would be redundant to complain
context_after:                 if let ty::ConstKind::Unevaluated(uv) = self.c.kind()