syntax_data: {"ast_node_type":"variable","tokens":[{"end":64,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:     let rvalue = Rvalue::NullaryOp(NullOp::AlignOf, pointee_ty);
context_before:         local_decls.push(LocalDecl::with_source_info(tcx.types.usize, source_info)).into();
context_after:     stmts.push(Statement::new(source_info, StatementKind::Assign(Box::new((alignment, rvalue)))));