syntax_data: {"ast_node_type":"other","tokens":[{"end":90,"kind":"keyword","start":0,"text":"trace!(\"trunc"}]}
source_snippet:         trace!("trunc {} with size {} and shift {}", n, width.bits(), 128 - width.bits());
context_before:         let width = lit_ty.primitive_size(tcx);
context_after:         let result = width.truncate(n);