Enum aws_sdk_appmesh::model::DurationUnit

#[non_exhaustive]
pub enum DurationUnit {
    Ms,
    S,
    Unknown(UnknownVariantValue),
}

When writing a match expression against DurationUnit, 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 durationunit = unimplemented!();
match durationunit {
    DurationUnit::Ms => { /* ... */ },
    DurationUnit::S => { /* ... */ },
    other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
    _ => { /* ... */ },
}

The above code demonstrates that when durationunit represents NewFeature, the execution path will lead to the second last match arm, even though the enum does not contain a variant DurationUnit::NewFeature in the current version of SDK. The reason is that the variable other, created by the @ operator, is bound to DurationUnit::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 DurationUnit::NewFeature is defined. Specifically, when durationunit represents NewFeature, the execution path will hit the second last match arm as before by virtue of calling as_str on DurationUnit::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.

Ms

S

Unknown(UnknownVariantValue)

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

Implementations

impl DurationUnit

pub fn as_str(&self) -> &str

Returns the &str value of the enum member.

Examples found in repository

src/model.rs (line 3452)

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

src/json_ser.rs (line 2236)

pub fn serialize_structure_crate_model_duration(
    object: &mut aws_smithy_json::serialize::JsonObjectWriter,
    input: &crate::model::Duration,
) -> Result<(), aws_smithy_http::operation::error::SerializationError> {
    if let Some(var_388) = &input.value {
        object.key("value").number(
            #[allow(clippy::useless_conversion)]
            aws_smithy_types::Number::NegInt((*var_388).into()),
        );
    }
    if let Some(var_389) = &input.unit {
        object.key("unit").string(var_389.as_str());
    }
    Ok(())
}

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

Returns all the &str values of the enum members.

Trait Implementations

impl AsRef<str> for DurationUnit

fn as_ref(&self) -> &str

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

impl Clone for DurationUnit

fn clone(&self) -> DurationUnit

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for DurationUnit

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

Formats the value using the given formatter.

impl From<&str> for DurationUnit

fn from(s: &str) -> Self

Converts to this type from the input type.

impl FromStr for DurationUnit

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 DurationUnit

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 DurationUnit

fn cmp(&self, other: &DurationUnit) -> 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<DurationUnit> for DurationUnit

fn eq(&self, other: &DurationUnit) -> 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<DurationUnit> for DurationUnit

fn partial_cmp(&self, other: &DurationUnit) -> 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 DurationUnit

impl StructuralEq for DurationUnit

impl StructuralPartialEq for DurationUnit