1#[derive(::std::clone::Clone, ::std::default::Default, ::std::fmt::Debug)]
4#[non_exhaustive]
5pub struct RecognizeUtterance;
6impl RecognizeUtterance {
7 pub fn new() -> Self {
9 Self
10 }
11 pub(crate) async fn orchestrate(
12 runtime_plugins: &::aws_smithy_runtime_api::client::runtime_plugin::RuntimePlugins,
13 input: crate::operation::recognize_utterance::RecognizeUtteranceInput,
14 ) -> ::std::result::Result<
15 crate::operation::recognize_utterance::RecognizeUtteranceOutput,
16 ::aws_smithy_runtime_api::client::result::SdkError<
17 crate::operation::recognize_utterance::RecognizeUtteranceError,
18 ::aws_smithy_runtime_api::client::orchestrator::HttpResponse,
19 >,
20 > {
21 let map_err = |err: ::aws_smithy_runtime_api::client::result::SdkError<
22 ::aws_smithy_runtime_api::client::interceptors::context::Error,
23 ::aws_smithy_runtime_api::client::orchestrator::HttpResponse,
24 >| {
25 err.map_service_error(|err| {
26 err.downcast::<crate::operation::recognize_utterance::RecognizeUtteranceError>()
27 .expect("correct error type")
28 })
29 };
30 let context = Self::orchestrate_with_stop_point(runtime_plugins, input, ::aws_smithy_runtime::client::orchestrator::StopPoint::None)
31 .await
32 .map_err(map_err)?;
33 let output = context.finalize().map_err(map_err)?;
34 ::std::result::Result::Ok(
35 output
36 .downcast::<crate::operation::recognize_utterance::RecognizeUtteranceOutput>()
37 .expect("correct output type"),
38 )
39 }
40
41 pub(crate) async fn orchestrate_with_stop_point(
42 runtime_plugins: &::aws_smithy_runtime_api::client::runtime_plugin::RuntimePlugins,
43 input: crate::operation::recognize_utterance::RecognizeUtteranceInput,
44 stop_point: ::aws_smithy_runtime::client::orchestrator::StopPoint,
45 ) -> ::std::result::Result<
46 ::aws_smithy_runtime_api::client::interceptors::context::InterceptorContext,
47 ::aws_smithy_runtime_api::client::result::SdkError<
48 ::aws_smithy_runtime_api::client::interceptors::context::Error,
49 ::aws_smithy_runtime_api::client::orchestrator::HttpResponse,
50 >,
51 > {
52 let input = ::aws_smithy_runtime_api::client::interceptors::context::Input::erase(input);
53 use ::tracing::Instrument;
54 ::aws_smithy_runtime::client::orchestrator::invoke_with_stop_point("Lex Runtime V2", "RecognizeUtterance", input, runtime_plugins, stop_point)
55 .instrument(::tracing::debug_span!(
58 "Lex Runtime V2.RecognizeUtterance",
59 "rpc.service" = "Lex Runtime V2",
60 "rpc.method" = "RecognizeUtterance",
61 "sdk_invocation_id" = ::fastrand::u32(1_000_000..10_000_000),
62 "rpc.system" = "aws-api",
63 ))
64 .await
65 }
66
67 pub(crate) fn operation_runtime_plugins(
68 client_runtime_plugins: ::aws_smithy_runtime_api::client::runtime_plugin::RuntimePlugins,
69 client_config: &crate::config::Config,
70 config_override: ::std::option::Option<crate::config::Builder>,
71 ) -> ::aws_smithy_runtime_api::client::runtime_plugin::RuntimePlugins {
72 let mut runtime_plugins = client_runtime_plugins.with_operation_plugin(Self::new());
73
74 if let ::std::option::Option::Some(config_override) = config_override {
75 for plugin in config_override.runtime_plugins.iter().cloned() {
76 runtime_plugins = runtime_plugins.with_operation_plugin(plugin);
77 }
78 runtime_plugins = runtime_plugins.with_operation_plugin(crate::config::ConfigOverrideRuntimePlugin::new(
79 config_override,
80 client_config.config.clone(),
81 &client_config.runtime_components,
82 ));
83 }
84 runtime_plugins
85 }
86}
87impl ::aws_smithy_runtime_api::client::runtime_plugin::RuntimePlugin for RecognizeUtterance {
88 fn config(&self) -> ::std::option::Option<::aws_smithy_types::config_bag::FrozenLayer> {
89 let mut cfg = ::aws_smithy_types::config_bag::Layer::new("RecognizeUtterance");
90
91 cfg.store_put(::aws_smithy_runtime_api::client::ser_de::SharedRequestSerializer::new(
92 RecognizeUtteranceRequestSerializer,
93 ));
94 cfg.store_put(::aws_smithy_runtime_api::client::ser_de::SharedResponseDeserializer::new(
95 RecognizeUtteranceResponseDeserializer,
96 ));
97
98 cfg.store_put(::aws_smithy_runtime_api::client::auth::AuthSchemeOptionResolverParams::new(
99 crate::config::auth::Params::builder()
100 .operation_name("RecognizeUtterance")
101 .build()
102 .expect("required fields set"),
103 ));
104
105 cfg.store_put(::aws_smithy_runtime_api::client::orchestrator::Metadata::new(
106 "RecognizeUtterance",
107 "Lex Runtime V2",
108 ));
109 let mut signing_options = ::aws_runtime::auth::SigningOptions::default();
110 signing_options.double_uri_encode = true;
111 signing_options.content_sha256_header = true;
112 signing_options.normalize_uri_path = true;
113 signing_options.payload_override = Some(::aws_sigv4::http_request::SignableBody::UnsignedPayload);
114
115 cfg.store_put(::aws_runtime::auth::SigV4OperationSigningConfig {
116 signing_options,
117 ..::std::default::Default::default()
118 });
119
120 ::std::option::Option::Some(cfg.freeze())
121 }
122
123 fn runtime_components(
124 &self,
125 _: &::aws_smithy_runtime_api::client::runtime_components::RuntimeComponentsBuilder,
126 ) -> ::std::borrow::Cow<'_, ::aws_smithy_runtime_api::client::runtime_components::RuntimeComponentsBuilder> {
127 #[allow(unused_mut)]
128 let mut rcb = ::aws_smithy_runtime_api::client::runtime_components::RuntimeComponentsBuilder::new("RecognizeUtterance")
129 .with_interceptor(::aws_smithy_runtime::client::stalled_stream_protection::StalledStreamProtectionInterceptor::default())
130 .with_interceptor(RecognizeUtteranceEndpointParamsInterceptor)
131 .with_retry_classifier(::aws_smithy_runtime::client::retries::classifiers::TransientErrorClassifier::<
132 crate::operation::recognize_utterance::RecognizeUtteranceError,
133 >::new())
134 .with_retry_classifier(::aws_smithy_runtime::client::retries::classifiers::ModeledAsRetryableClassifier::<
135 crate::operation::recognize_utterance::RecognizeUtteranceError,
136 >::new())
137 .with_retry_classifier(::aws_runtime::retries::classifiers::AwsErrorCodeClassifier::<
138 crate::operation::recognize_utterance::RecognizeUtteranceError,
139 >::new());
140
141 ::std::borrow::Cow::Owned(rcb)
142 }
143}
144
145#[derive(Debug)]
146struct RecognizeUtteranceResponseDeserializer;
147impl ::aws_smithy_runtime_api::client::ser_de::DeserializeResponse for RecognizeUtteranceResponseDeserializer {
148 fn deserialize_streaming(
149 &self,
150 response: &mut ::aws_smithy_runtime_api::client::orchestrator::HttpResponse,
151 ) -> ::std::option::Option<::aws_smithy_runtime_api::client::interceptors::context::OutputOrError> {
152 #[allow(unused_mut)]
153 let mut force_error = false;
154 ::tracing::debug!(request_id = ?::aws_types::request_id::RequestId::request_id(response));
155
156 if (!response.status().is_success() && response.status().as_u16() != 200) || force_error {
158 return ::std::option::Option::None;
159 }
160 ::std::option::Option::Some(crate::protocol_serde::type_erase_result(
161 crate::protocol_serde::shape_recognize_utterance::de_recognize_utterance_http_response(response),
162 ))
163 }
164
165 fn deserialize_nonstreaming(
166 &self,
167 response: &::aws_smithy_runtime_api::client::orchestrator::HttpResponse,
168 ) -> ::aws_smithy_runtime_api::client::interceptors::context::OutputOrError {
169 let body = response.body().bytes().expect("body loaded");
171 crate::protocol_serde::type_erase_result(crate::protocol_serde::shape_recognize_utterance::de_recognize_utterance_http_error(
172 response.status().as_u16(),
173 response.headers(),
174 body,
175 ))
176 }
177}
178#[derive(Debug)]
179struct RecognizeUtteranceRequestSerializer;
180impl ::aws_smithy_runtime_api::client::ser_de::SerializeRequest for RecognizeUtteranceRequestSerializer {
181 #[allow(unused_mut, clippy::let_and_return, clippy::needless_borrow, clippy::useless_conversion)]
182 fn serialize_input(
183 &self,
184 input: ::aws_smithy_runtime_api::client::interceptors::context::Input,
185 _cfg: &mut ::aws_smithy_types::config_bag::ConfigBag,
186 ) -> ::std::result::Result<::aws_smithy_runtime_api::client::orchestrator::HttpRequest, ::aws_smithy_runtime_api::box_error::BoxError> {
187 let input = input
188 .downcast::<crate::operation::recognize_utterance::RecognizeUtteranceInput>()
189 .expect("correct type");
190 let _header_serialization_settings = _cfg
191 .load::<crate::serialization_settings::HeaderSerializationSettings>()
192 .cloned()
193 .unwrap_or_default();
194 let mut request_builder = {
195 fn uri_base(
196 _input: &crate::operation::recognize_utterance::RecognizeUtteranceInput,
197 output: &mut ::std::string::String,
198 ) -> ::std::result::Result<(), ::aws_smithy_types::error::operation::BuildError> {
199 use ::std::fmt::Write as _;
200 let input_1 = &_input.bot_id;
201 let input_1 = input_1
202 .as_ref()
203 .ok_or_else(|| ::aws_smithy_types::error::operation::BuildError::missing_field("bot_id", "cannot be empty or unset"))?;
204 let bot_id = ::aws_smithy_http::label::fmt_string(input_1, ::aws_smithy_http::label::EncodingStrategy::Default);
205 if bot_id.is_empty() {
206 return ::std::result::Result::Err(::aws_smithy_types::error::operation::BuildError::missing_field(
207 "bot_id",
208 "cannot be empty or unset",
209 ));
210 }
211 let input_2 = &_input.bot_alias_id;
212 let input_2 = input_2
213 .as_ref()
214 .ok_or_else(|| ::aws_smithy_types::error::operation::BuildError::missing_field("bot_alias_id", "cannot be empty or unset"))?;
215 let bot_alias_id = ::aws_smithy_http::label::fmt_string(input_2, ::aws_smithy_http::label::EncodingStrategy::Default);
216 if bot_alias_id.is_empty() {
217 return ::std::result::Result::Err(::aws_smithy_types::error::operation::BuildError::missing_field(
218 "bot_alias_id",
219 "cannot be empty or unset",
220 ));
221 }
222 let input_3 = &_input.locale_id;
223 let input_3 = input_3
224 .as_ref()
225 .ok_or_else(|| ::aws_smithy_types::error::operation::BuildError::missing_field("locale_id", "cannot be empty or unset"))?;
226 let locale_id = ::aws_smithy_http::label::fmt_string(input_3, ::aws_smithy_http::label::EncodingStrategy::Default);
227 if locale_id.is_empty() {
228 return ::std::result::Result::Err(::aws_smithy_types::error::operation::BuildError::missing_field(
229 "locale_id",
230 "cannot be empty or unset",
231 ));
232 }
233 let input_4 = &_input.session_id;
234 let input_4 = input_4
235 .as_ref()
236 .ok_or_else(|| ::aws_smithy_types::error::operation::BuildError::missing_field("session_id", "cannot be empty or unset"))?;
237 let session_id = ::aws_smithy_http::label::fmt_string(input_4, ::aws_smithy_http::label::EncodingStrategy::Default);
238 if session_id.is_empty() {
239 return ::std::result::Result::Err(::aws_smithy_types::error::operation::BuildError::missing_field(
240 "session_id",
241 "cannot be empty or unset",
242 ));
243 }
244 ::std::write!(
245 output,
246 "/bots/{botId}/botAliases/{botAliasId}/botLocales/{localeId}/sessions/{sessionId}/utterance",
247 botId = bot_id,
248 botAliasId = bot_alias_id,
249 localeId = locale_id,
250 sessionId = session_id
251 )
252 .expect("formatting should succeed");
253 ::std::result::Result::Ok(())
254 }
255 #[allow(clippy::unnecessary_wraps)]
256 fn update_http_builder(
257 input: &crate::operation::recognize_utterance::RecognizeUtteranceInput,
258 builder: ::http::request::Builder,
259 ) -> ::std::result::Result<::http::request::Builder, ::aws_smithy_types::error::operation::BuildError> {
260 let mut uri = ::std::string::String::new();
261 uri_base(input, &mut uri)?;
262 let builder = crate::protocol_serde::shape_recognize_utterance::ser_recognize_utterance_headers(input, builder)?;
263 ::std::result::Result::Ok(builder.method("POST").uri(uri))
264 }
265 let mut builder = update_http_builder(&input, ::http::request::Builder::new())?;
266 builder = _header_serialization_settings.set_default_header(builder, ::http::header::CONTENT_TYPE, "application/octet-stream");
267 builder
268 };
269 let body = crate::protocol_serde::shape_recognize_utterance_input::ser_input_stream_http_payload(input.input_stream)?.into_inner();
270 if let Some(content_length) = body.content_length() {
271 let content_length = content_length.to_string();
272 request_builder = _header_serialization_settings.set_default_header(request_builder, ::http::header::CONTENT_LENGTH, &content_length);
273 }
274 ::std::result::Result::Ok(request_builder.body(body).expect("valid request").try_into().unwrap())
275 }
276}
277#[derive(Debug)]
278struct RecognizeUtteranceEndpointParamsInterceptor;
279
280impl ::aws_smithy_runtime_api::client::interceptors::Intercept for RecognizeUtteranceEndpointParamsInterceptor {
281 fn name(&self) -> &'static str {
282 "RecognizeUtteranceEndpointParamsInterceptor"
283 }
284
285 fn read_before_execution(
286 &self,
287 context: &::aws_smithy_runtime_api::client::interceptors::context::BeforeSerializationInterceptorContextRef<
288 '_,
289 ::aws_smithy_runtime_api::client::interceptors::context::Input,
290 ::aws_smithy_runtime_api::client::interceptors::context::Output,
291 ::aws_smithy_runtime_api::client::interceptors::context::Error,
292 >,
293 cfg: &mut ::aws_smithy_types::config_bag::ConfigBag,
294 ) -> ::std::result::Result<(), ::aws_smithy_runtime_api::box_error::BoxError> {
295 let _input = context
296 .input()
297 .downcast_ref::<RecognizeUtteranceInput>()
298 .ok_or("failed to downcast to RecognizeUtteranceInput")?;
299
300 let params = crate::config::endpoint::Params::builder()
301 .set_region(cfg.load::<::aws_types::region::Region>().map(|r| r.as_ref().to_owned()))
302 .set_use_dual_stack(cfg.load::<::aws_types::endpoint_config::UseDualStack>().map(|ty| ty.0))
303 .set_use_fips(cfg.load::<::aws_types::endpoint_config::UseFips>().map(|ty| ty.0))
304 .set_endpoint(cfg.load::<::aws_types::endpoint_config::EndpointUrl>().map(|ty| ty.0.clone()))
305 .build()
306 .map_err(|err| {
307 ::aws_smithy_runtime_api::client::interceptors::error::ContextAttachedError::new("endpoint params could not be built", err)
308 })?;
309 cfg.interceptor_state()
310 .store_put(::aws_smithy_runtime_api::client::endpoint::EndpointResolverParams::new(params));
311 ::std::result::Result::Ok(())
312 }
313}
314
315#[non_exhaustive]
320#[derive(::std::fmt::Debug)]
321pub enum RecognizeUtteranceError {
322 AccessDeniedException(crate::types::error::AccessDeniedException),
324 BadGatewayException(crate::types::error::BadGatewayException),
326 ConflictException(crate::types::error::ConflictException),
328 DependencyFailedException(crate::types::error::DependencyFailedException),
330 InternalServerException(crate::types::error::InternalServerException),
332 ResourceNotFoundException(crate::types::error::ResourceNotFoundException),
334 ThrottlingException(crate::types::error::ThrottlingException),
336 ValidationException(crate::types::error::ValidationException),
338 #[deprecated(note = "Matching `Unhandled` directly is not forwards compatible. Instead, match using a \
340 variable wildcard pattern and check `.code()`:
341 \
342 `err if err.code() == Some(\"SpecificExceptionCode\") => { /* handle the error */ }`
343 \
344 See [`ProvideErrorMetadata`](#impl-ProvideErrorMetadata-for-RecognizeUtteranceError) for what information is available for the error.")]
345 Unhandled(crate::error::sealed_unhandled::Unhandled),
346}
347impl RecognizeUtteranceError {
348 pub fn unhandled(
350 err: impl ::std::convert::Into<::std::boxed::Box<dyn ::std::error::Error + ::std::marker::Send + ::std::marker::Sync + 'static>>,
351 ) -> Self {
352 Self::Unhandled(crate::error::sealed_unhandled::Unhandled {
353 source: err.into(),
354 meta: ::std::default::Default::default(),
355 })
356 }
357
358 pub fn generic(err: ::aws_smithy_types::error::ErrorMetadata) -> Self {
360 Self::Unhandled(crate::error::sealed_unhandled::Unhandled {
361 source: err.clone().into(),
362 meta: err,
363 })
364 }
365 pub fn meta(&self) -> &::aws_smithy_types::error::ErrorMetadata {
370 match self {
371 Self::AccessDeniedException(e) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(e),
372 Self::BadGatewayException(e) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(e),
373 Self::ConflictException(e) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(e),
374 Self::DependencyFailedException(e) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(e),
375 Self::InternalServerException(e) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(e),
376 Self::ResourceNotFoundException(e) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(e),
377 Self::ThrottlingException(e) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(e),
378 Self::ValidationException(e) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(e),
379 Self::Unhandled(e) => &e.meta,
380 }
381 }
382 pub fn is_access_denied_exception(&self) -> bool {
384 matches!(self, Self::AccessDeniedException(_))
385 }
386 pub fn is_bad_gateway_exception(&self) -> bool {
388 matches!(self, Self::BadGatewayException(_))
389 }
390 pub fn is_conflict_exception(&self) -> bool {
392 matches!(self, Self::ConflictException(_))
393 }
394 pub fn is_dependency_failed_exception(&self) -> bool {
396 matches!(self, Self::DependencyFailedException(_))
397 }
398 pub fn is_internal_server_exception(&self) -> bool {
400 matches!(self, Self::InternalServerException(_))
401 }
402 pub fn is_resource_not_found_exception(&self) -> bool {
404 matches!(self, Self::ResourceNotFoundException(_))
405 }
406 pub fn is_throttling_exception(&self) -> bool {
408 matches!(self, Self::ThrottlingException(_))
409 }
410 pub fn is_validation_exception(&self) -> bool {
412 matches!(self, Self::ValidationException(_))
413 }
414}
415impl ::std::error::Error for RecognizeUtteranceError {
416 fn source(&self) -> ::std::option::Option<&(dyn ::std::error::Error + 'static)> {
417 match self {
418 Self::AccessDeniedException(_inner) => ::std::option::Option::Some(_inner),
419 Self::BadGatewayException(_inner) => ::std::option::Option::Some(_inner),
420 Self::ConflictException(_inner) => ::std::option::Option::Some(_inner),
421 Self::DependencyFailedException(_inner) => ::std::option::Option::Some(_inner),
422 Self::InternalServerException(_inner) => ::std::option::Option::Some(_inner),
423 Self::ResourceNotFoundException(_inner) => ::std::option::Option::Some(_inner),
424 Self::ThrottlingException(_inner) => ::std::option::Option::Some(_inner),
425 Self::ValidationException(_inner) => ::std::option::Option::Some(_inner),
426 Self::Unhandled(_inner) => ::std::option::Option::Some(&*_inner.source),
427 }
428 }
429}
430impl ::std::fmt::Display for RecognizeUtteranceError {
431 fn fmt(&self, f: &mut ::std::fmt::Formatter<'_>) -> ::std::fmt::Result {
432 match self {
433 Self::AccessDeniedException(_inner) => _inner.fmt(f),
434 Self::BadGatewayException(_inner) => _inner.fmt(f),
435 Self::ConflictException(_inner) => _inner.fmt(f),
436 Self::DependencyFailedException(_inner) => _inner.fmt(f),
437 Self::InternalServerException(_inner) => _inner.fmt(f),
438 Self::ResourceNotFoundException(_inner) => _inner.fmt(f),
439 Self::ThrottlingException(_inner) => _inner.fmt(f),
440 Self::ValidationException(_inner) => _inner.fmt(f),
441 Self::Unhandled(_inner) => {
442 if let ::std::option::Option::Some(code) = ::aws_smithy_types::error::metadata::ProvideErrorMetadata::code(self) {
443 write!(f, "unhandled error ({code})")
444 } else {
445 f.write_str("unhandled error")
446 }
447 }
448 }
449 }
450}
451impl ::aws_smithy_types::retry::ProvideErrorKind for RecognizeUtteranceError {
452 fn code(&self) -> ::std::option::Option<&str> {
453 ::aws_smithy_types::error::metadata::ProvideErrorMetadata::code(self)
454 }
455 fn retryable_error_kind(&self) -> ::std::option::Option<::aws_smithy_types::retry::ErrorKind> {
456 ::std::option::Option::None
457 }
458}
459impl ::aws_smithy_types::error::metadata::ProvideErrorMetadata for RecognizeUtteranceError {
460 fn meta(&self) -> &::aws_smithy_types::error::ErrorMetadata {
461 match self {
462 Self::AccessDeniedException(_inner) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(_inner),
463 Self::BadGatewayException(_inner) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(_inner),
464 Self::ConflictException(_inner) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(_inner),
465 Self::DependencyFailedException(_inner) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(_inner),
466 Self::InternalServerException(_inner) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(_inner),
467 Self::ResourceNotFoundException(_inner) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(_inner),
468 Self::ThrottlingException(_inner) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(_inner),
469 Self::ValidationException(_inner) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(_inner),
470 Self::Unhandled(_inner) => &_inner.meta,
471 }
472 }
473}
474impl ::aws_smithy_runtime_api::client::result::CreateUnhandledError for RecognizeUtteranceError {
475 fn create_unhandled_error(
476 source: ::std::boxed::Box<dyn ::std::error::Error + ::std::marker::Send + ::std::marker::Sync + 'static>,
477 meta: ::std::option::Option<::aws_smithy_types::error::ErrorMetadata>,
478 ) -> Self {
479 Self::Unhandled(crate::error::sealed_unhandled::Unhandled {
480 source,
481 meta: meta.unwrap_or_default(),
482 })
483 }
484}
485impl ::aws_types::request_id::RequestId for crate::operation::recognize_utterance::RecognizeUtteranceError {
486 fn request_id(&self) -> Option<&str> {
487 self.meta().request_id()
488 }
489}
490
491pub use crate::operation::recognize_utterance::_recognize_utterance_output::RecognizeUtteranceOutput;
492
493pub use crate::operation::recognize_utterance::_recognize_utterance_input::RecognizeUtteranceInput;
494
495mod _recognize_utterance_input;
496
497mod _recognize_utterance_output;
498
499pub mod builders;