{"ast_node_type":"other","tokens":[{"end":71,"kind":"keyword","start":0,"text":"ecx.dcx().emit_err(errors::ProcMacroDeriveTokens"}]}
            ecx.dcx().emit_err(errors::ProcMacroDeriveTokens { span });
        if ecx.dcx().err_count() > error_count_before {
        }