Enum aws_sdk_ec2::model::DomainType

#[non_exhaustive]
pub enum DomainType {
    Standard,
    Vpc,
    Unknown(UnknownVariantValue),
}

When writing a match expression against DomainType, 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 domaintype = unimplemented!();
match domaintype {
    DomainType::Standard => { /* ... */ },
    DomainType::Vpc => { /* ... */ },
    other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
    _ => { /* ... */ },
}

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

Standard

Vpc

Unknown(UnknownVariantValue)

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

Implementations

impl DomainType

pub fn as_str(&self) -> &str

Returns the &str value of the enum member.

Examples found in repository

src/model.rs (line 114592)

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

src/operation_ser.rs (line 216)

pub fn serialize_operation_crate_operation_allocate_address(
    input: &crate::input::AllocateAddressInput,
) -> Result<aws_smithy_http::body::SdkBody, aws_smithy_http::operation::error::SerializationError> {
    let mut out = String::new();
    #[allow(unused_mut)]
    let mut writer = aws_smithy_query::QueryWriter::new(&mut out, "AllocateAddress", "2016-11-15");
    #[allow(unused_mut)]
    let mut scope_49 = writer.prefix("Domain");
    if let Some(var_50) = &input.domain {
        scope_49.string(var_50.as_str());
    }
    #[allow(unused_mut)]
    let mut scope_51 = writer.prefix("Address");
    if let Some(var_52) = &input.address {
        scope_51.string(var_52);
    }
    #[allow(unused_mut)]
    let mut scope_53 = writer.prefix("PublicIpv4Pool");
    if let Some(var_54) = &input.public_ipv4_pool {
        scope_53.string(var_54);
    }
    #[allow(unused_mut)]
    let mut scope_55 = writer.prefix("NetworkBorderGroup");
    if let Some(var_56) = &input.network_border_group {
        scope_55.string(var_56);
    }
    #[allow(unused_mut)]
    let mut scope_57 = writer.prefix("CustomerOwnedIpv4Pool");
    if let Some(var_58) = &input.customer_owned_ipv4_pool {
        scope_57.string(var_58);
    }
    #[allow(unused_mut)]
    let mut scope_59 = writer.prefix("DryRun");
    if let Some(var_60) = &input.dry_run {
        scope_59.boolean(*var_60);
    }
    #[allow(unused_mut)]
    let mut scope_61 = writer.prefix("TagSpecification");
    if let Some(var_62) = &input.tag_specifications {
        let mut list_64 = scope_61.start_list(true, Some("item"));
        for item_63 in var_62 {
            #[allow(unused_mut)]
            let mut entry_65 = list_64.entry();
            crate::query_ser::serialize_structure_crate_model_tag_specification(entry_65, item_63)?;
        }
        list_64.finish();
    }
    writer.finish();
    Ok(aws_smithy_http::body::SdkBody::from(out))
}

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

Returns all the &str values of the enum members.

Trait Implementations

impl AsRef<str> for DomainType

fn as_ref(&self) -> &str

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

impl Clone for DomainType

fn clone(&self) -> DomainType

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for DomainType

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

Formats the value using the given formatter.

impl From<&str> for DomainType

fn from(s: &str) -> Self

Converts to this type from the input type.

impl FromStr for DomainType

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 DomainType

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 DomainType

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

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

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

impl StructuralEq for DomainType

impl StructuralPartialEq for DomainType