syntax_data: {"ast_node_type":"other","tokens":[{"end":41,"kind":"keyword","start":0,"text":".try_to_target_usize(tcx)"}]}
source_snippet:                 .try_to_target_usize(tcx)
context_before:             let count = extract_const_value(cx, ty, count)?
context_after:                 .ok_or_else(|| error(cx, LayoutError::Unknown(ty)))?;