syntax_data: {"ast_node_type":"other","tokens":[{"end":30,"kind":"keyword","start":0,"text":"Some(did)"}]}
source_snippet:                 Some(did) => {
context_before:                 // and not the beginning of discriminants (which is always `0`)
context_after:                     let kind = ExprKind::NamedConst { def_id: did, args, user_ty: None };