Enum aws_sdk_appmesh::model::TcpRetryPolicyEvent

#[non_exhaustive]
pub enum TcpRetryPolicyEvent {
    ConnectionError,
    Unknown(UnknownVariantValue),
}

When writing a match expression against TcpRetryPolicyEvent, it is important to ensure your code is forward-compatible. That is, if a match arm handles a case for a feature that is supported by the service but has not been represented as an enum variant in a current version of SDK, your code should continue to work when you upgrade SDK to a future version in which the enum does include a variant for that feature.

Here is an example of how you can make a match expression forward-compatible:

# let tcpretrypolicyevent = unimplemented!();
match tcpretrypolicyevent {
    TcpRetryPolicyEvent::ConnectionError => { /* ... */ },
    other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
    _ => { /* ... */ },
}

The above code demonstrates that when tcpretrypolicyevent represents NewFeature, the execution path will lead to the second last match arm, even though the enum does not contain a variant TcpRetryPolicyEvent::NewFeature in the current version of SDK. The reason is that the variable other, created by the @ operator, is bound to TcpRetryPolicyEvent::Unknown(UnknownVariantValue("NewFeature".to_owned())) and calling as_str on it yields "NewFeature". This match expression is forward-compatible when executed with a newer version of SDK where the variant TcpRetryPolicyEvent::NewFeature is defined. Specifically, when tcpretrypolicyevent represents NewFeature, the execution path will hit the second last match arm as before by virtue of calling as_str on TcpRetryPolicyEvent::NewFeature also yielding "NewFeature".

Explicitly matching on the Unknown variant should be avoided for two reasons:

• The inner data UnknownVariantValue is opaque, and no further information can be extracted.
• It might inadvertently shadow other intended match arms.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

ConnectionError

Unknown(UnknownVariantValue)

Unknown contains new variants that have been added since this code was generated.

Implementations

impl TcpRetryPolicyEvent

pub fn as_str(&self) -> &str

Returns the &str value of the enum member.

Examples found in repository

src/model.rs (line 3832)

    fn as_ref(&self) -> &str {
        self.as_str()
    }

src/json_ser.rs (line 1330)

pub fn serialize_structure_crate_model_http_retry_policy(
    object: &mut aws_smithy_json::serialize::JsonObjectWriter,
    input: &crate::model::HttpRetryPolicy,
) -> Result<(), aws_smithy_http::operation::error::SerializationError> {
    if let Some(var_251) = &input.per_retry_timeout {
        #[allow(unused_mut)]
        let mut object_252 = object.key("perRetryTimeout").start_object();
        crate::json_ser::serialize_structure_crate_model_duration(&mut object_252, var_251)?;
        object_252.finish();
    }
    if let Some(var_253) = &input.max_retries {
        object.key("maxRetries").number(
            #[allow(clippy::useless_conversion)]
            aws_smithy_types::Number::NegInt((*var_253).into()),
        );
    }
    if let Some(var_254) = &input.http_retry_events {
        let mut array_255 = object.key("httpRetryEvents").start_array();
        for item_256 in var_254 {
            {
                array_255.value().string(item_256.as_str());
            }
        }
        array_255.finish();
    }
    if let Some(var_257) = &input.tcp_retry_events {
        let mut array_258 = object.key("tcpRetryEvents").start_array();
        for item_259 in var_257 {
            {
                array_258.value().string(item_259.as_str());
            }
        }
        array_258.finish();
    }
    Ok(())
}

pub fn serialize_structure_crate_model_http_timeout(
    object: &mut aws_smithy_json::serialize::JsonObjectWriter,
    input: &crate::model::HttpTimeout,
) -> Result<(), aws_smithy_http::operation::error::SerializationError> {
    if let Some(var_260) = &input.per_request {
        #[allow(unused_mut)]
        let mut object_261 = object.key("perRequest").start_object();
        crate::json_ser::serialize_structure_crate_model_duration(&mut object_261, var_260)?;
        object_261.finish();
    }
    if let Some(var_262) = &input.idle {
        #[allow(unused_mut)]
        let mut object_263 = object.key("idle").start_object();
        crate::json_ser::serialize_structure_crate_model_duration(&mut object_263, var_262)?;
        object_263.finish();
    }
    Ok(())
}

pub fn serialize_structure_crate_model_tcp_route_action(
    object: &mut aws_smithy_json::serialize::JsonObjectWriter,
    input: &crate::model::TcpRouteAction,
) -> Result<(), aws_smithy_http::operation::error::SerializationError> {
    if let Some(var_264) = &input.weighted_targets {
        let mut array_265 = object.key("weightedTargets").start_array();
        for item_266 in var_264 {
            {
                #[allow(unused_mut)]
                let mut object_267 = array_265.value().start_object();
                crate::json_ser::serialize_structure_crate_model_weighted_target(
                    &mut object_267,
                    item_266,
                )?;
                object_267.finish();
            }
        }
        array_265.finish();
    }
    Ok(())
}

pub fn serialize_structure_crate_model_tcp_timeout(
    object: &mut aws_smithy_json::serialize::JsonObjectWriter,
    input: &crate::model::TcpTimeout,
) -> Result<(), aws_smithy_http::operation::error::SerializationError> {
    if let Some(var_268) = &input.idle {
        #[allow(unused_mut)]
        let mut object_269 = object.key("idle").start_object();
        crate::json_ser::serialize_structure_crate_model_duration(&mut object_269, var_268)?;
        object_269.finish();
    }
    Ok(())
}

pub fn serialize_structure_crate_model_tcp_route_match(
    object: &mut aws_smithy_json::serialize::JsonObjectWriter,
    input: &crate::model::TcpRouteMatch,
) -> Result<(), aws_smithy_http::operation::error::SerializationError> {
    if let Some(var_270) = &input.port {
        object.key("port").number(
            #[allow(clippy::useless_conversion)]
            aws_smithy_types::Number::NegInt((*var_270).into()),
        );
    }
    Ok(())
}

pub fn serialize_structure_crate_model_grpc_route_action(
    object: &mut aws_smithy_json::serialize::JsonObjectWriter,
    input: &crate::model::GrpcRouteAction,
) -> Result<(), aws_smithy_http::operation::error::SerializationError> {
    if let Some(var_271) = &input.weighted_targets {
        let mut array_272 = object.key("weightedTargets").start_array();
        for item_273 in var_271 {
            {
                #[allow(unused_mut)]
                let mut object_274 = array_272.value().start_object();
                crate::json_ser::serialize_structure_crate_model_weighted_target(
                    &mut object_274,
                    item_273,
                )?;
                object_274.finish();
            }
        }
        array_272.finish();
    }
    Ok(())
}

pub fn serialize_structure_crate_model_grpc_route_match(
    object: &mut aws_smithy_json::serialize::JsonObjectWriter,
    input: &crate::model::GrpcRouteMatch,
) -> Result<(), aws_smithy_http::operation::error::SerializationError> {
    if let Some(var_275) = &input.service_name {
        object.key("serviceName").string(var_275.as_str());
    }
    if let Some(var_276) = &input.method_name {
        object.key("methodName").string(var_276.as_str());
    }
    if let Some(var_277) = &input.metadata {
        let mut array_278 = object.key("metadata").start_array();
        for item_279 in var_277 {
            {
                #[allow(unused_mut)]
                let mut object_280 = array_278.value().start_object();
                crate::json_ser::serialize_structure_crate_model_grpc_route_metadata(
                    &mut object_280,
                    item_279,
                )?;
                object_280.finish();
            }
        }
        array_278.finish();
    }
    if let Some(var_281) = &input.port {
        object.key("port").number(
            #[allow(clippy::useless_conversion)]
            aws_smithy_types::Number::NegInt((*var_281).into()),
        );
    }
    Ok(())
}

pub fn serialize_structure_crate_model_grpc_retry_policy(
    object: &mut aws_smithy_json::serialize::JsonObjectWriter,
    input: &crate::model::GrpcRetryPolicy,
) -> Result<(), aws_smithy_http::operation::error::SerializationError> {
    if let Some(var_282) = &input.per_retry_timeout {
        #[allow(unused_mut)]
        let mut object_283 = object.key("perRetryTimeout").start_object();
        crate::json_ser::serialize_structure_crate_model_duration(&mut object_283, var_282)?;
        object_283.finish();
    }
    if let Some(var_284) = &input.max_retries {
        object.key("maxRetries").number(
            #[allow(clippy::useless_conversion)]
            aws_smithy_types::Number::NegInt((*var_284).into()),
        );
    }
    if let Some(var_285) = &input.http_retry_events {
        let mut array_286 = object.key("httpRetryEvents").start_array();
        for item_287 in var_285 {
            {
                array_286.value().string(item_287.as_str());
            }
        }
        array_286.finish();
    }
    if let Some(var_288) = &input.tcp_retry_events {
        let mut array_289 = object.key("tcpRetryEvents").start_array();
        for item_290 in var_288 {
            {
                array_289.value().string(item_290.as_str());
            }
        }
        array_289.finish();
    }
    if let Some(var_291) = &input.grpc_retry_events {
        let mut array_292 = object.key("grpcRetryEvents").start_array();
        for item_293 in var_291 {
            {
                array_292.value().string(item_293.as_str());
            }
        }
        array_292.finish();
    }
    Ok(())
}

pub const fn values() -> &'static [&'static str]

Returns all the &str values of the enum members.

Trait Implementations

impl AsRef<str> for TcpRetryPolicyEvent

fn as_ref(&self) -> &str

Converts this type into a shared reference of the (usually inferred) input type.

impl Clone for TcpRetryPolicyEvent

fn clone(&self) -> TcpRetryPolicyEvent

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for TcpRetryPolicyEvent

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl From<&str> for TcpRetryPolicyEvent

fn from(s: &str) -> Self

Converts to this type from the input type.

impl FromStr for TcpRetryPolicyEvent

type Err = Infallible

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<Self, Self::Err>

Parses a string s to return a value of this type.

impl Hash for TcpRetryPolicyEvent

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)where
    H: Hasher,
    Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for TcpRetryPolicyEvent

fn cmp(&self, other: &TcpRetryPolicyEvent) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Selfwhere
    Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Selfwhere
    Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Selfwhere
    Self: Sized + PartialOrd<Self>,

Restrict a value to a certain interval.

impl PartialEq<TcpRetryPolicyEvent> for TcpRetryPolicyEvent

fn eq(&self, other: &TcpRetryPolicyEvent) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd<TcpRetryPolicyEvent> for TcpRetryPolicyEvent

fn partial_cmp(&self, other: &TcpRetryPolicyEvent) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl Eq for TcpRetryPolicyEvent

impl StructuralEq for TcpRetryPolicyEvent

impl StructuralPartialEq for TcpRetryPolicyEvent