{"ast_node_type":"variable","tokens":[{"end":51,"kind":"keyword","start":0,"text":"let"}]}
    let cpu_names = llvm::build_string(|s| unsafe {
fn print_target_cpus(sess: &Session, tm: &llvm::TargetMachine, out: &mut String) {
        llvm::LLVMRustPrintTargetCPUs(&tm, s);