syntax_data: {"ast_node_type":"variable","tokens":[{"end":24,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:     let alignment_mask =
context_before:     // Subtract 1 from the alignment to get the alignment mask
context_after:         local_decls.push(LocalDecl::with_source_info(tcx.types.usize, source_info)).into();