syntax_data: {"ast_node_type":"other","tokens":[{"end":59,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:             // Check for assignment to fields of a constant
context_before:         if let StatementKind::Assign(box (lhs, _)) = &stmt.kind {
context_after:             // Assigning directly to a constant (e.g. `FOO = true;`) is a hard error,