syntax_data: {"ast_node_type":"other","tokens":[{"end":29,"kind":"keyword","start":0,"text":"ExprKind::Adt(_)"}]}
source_snippet:         ExprKind::Adt(_) => {
context_before:         }
context_after:             maybe_supported_error(GenericConstantTooComplexSub::AdtNotSupported(node.span))?