syntax_data: {"ast_node_type":"variable","tokens":[{"end":93,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:     let rvalue = Rvalue::Cast(CastKind::Transmute, Operand::Copy(thin_ptr), tcx.types.usize);
context_before:     // Transmute the pointer to a usize (equivalent to `ptr.addr()`).
context_after:     let addr = local_decls.push(LocalDecl::with_source_info(tcx.types.usize, source_info)).into();