{"ast_node_type":"other","tokens":[{"end":24,"kind":"keyword","start":0,"text":"if"}]}
    if !tts.is_empty() {
pub(crate) fn check_zero_tts(cx: &ExtCtxt<'_>, span: Span, tts: TokenStream, name: &str) {
        cx.dcx().emit_err(errors::TakesNoArguments { span, name });