syntax_data: {"ast_node_type":"other","tokens":[{"end":33,"kind":"keyword","start":0,"text":"p.print_alloc_ids"}]}
source_snippet:         p.print_alloc_ids = true;
context_before:         let mut p = FmtPrinter::new(tcx, Namespace::ValueNS);
context_after:         p.pretty_print_const(literal, print_types)?;