syntax_data: {"ast_node_type":"other","tokens":[{"end":36,"kind":"keyword","start":0,"text":"ExprKind::Literal"}]}
source_snippet:             ExprKind::Literal { .. }
context_before:         parse_by_kind!(self, expr_id, expr, "constant",
context_after:             | ExprKind::NamedConst { .. }