Enum aws_sdk_ec2::model::OfferingClassType

#[non_exhaustive]
pub enum OfferingClassType {
    Convertible,
    Standard,
    Unknown(UnknownVariantValue),
}

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

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

Convertible

Standard

Unknown(UnknownVariantValue)

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

Implementations

impl OfferingClassType

pub fn as_str(&self) -> &str

Returns the &str value of the enum member.

Examples found in repository

src/model.rs (line 84043)

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

src/operation_ser.rs (line 11589)

pub fn serialize_operation_crate_operation_describe_reserved_instances(
    input: &crate::input::DescribeReservedInstancesInput,
) -> 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, "DescribeReservedInstances", "2016-11-15");
    #[allow(unused_mut)]
    let mut scope_3287 = writer.prefix("Filter");
    if let Some(var_3288) = &input.filters {
        let mut list_3290 = scope_3287.start_list(true, Some("Filter"));
        for item_3289 in var_3288 {
            #[allow(unused_mut)]
            let mut entry_3291 = list_3290.entry();
            crate::query_ser::serialize_structure_crate_model_filter(entry_3291, item_3289)?;
        }
        list_3290.finish();
    }
    #[allow(unused_mut)]
    let mut scope_3292 = writer.prefix("OfferingClass");
    if let Some(var_3293) = &input.offering_class {
        scope_3292.string(var_3293.as_str());
    }
    #[allow(unused_mut)]
    let mut scope_3294 = writer.prefix("ReservedInstancesId");
    if let Some(var_3295) = &input.reserved_instances_ids {
        let mut list_3297 = scope_3294.start_list(true, Some("ReservedInstancesId"));
        for item_3296 in var_3295 {
            #[allow(unused_mut)]
            let mut entry_3298 = list_3297.entry();
            entry_3298.string(item_3296);
        }
        list_3297.finish();
    }
    #[allow(unused_mut)]
    let mut scope_3299 = writer.prefix("DryRun");
    if let Some(var_3300) = &input.dry_run {
        scope_3299.boolean(*var_3300);
    }
    #[allow(unused_mut)]
    let mut scope_3301 = writer.prefix("OfferingType");
    if let Some(var_3302) = &input.offering_type {
        scope_3301.string(var_3302.as_str());
    }
    writer.finish();
    Ok(aws_smithy_http::body::SdkBody::from(out))
}

pub fn serialize_operation_crate_operation_describe_reserved_instances_listings(
    input: &crate::input::DescribeReservedInstancesListingsInput,
) -> 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,
        "DescribeReservedInstancesListings",
        "2016-11-15",
    );
    #[allow(unused_mut)]
    let mut scope_3303 = writer.prefix("Filter");
    if let Some(var_3304) = &input.filters {
        let mut list_3306 = scope_3303.start_list(true, Some("Filter"));
        for item_3305 in var_3304 {
            #[allow(unused_mut)]
            let mut entry_3307 = list_3306.entry();
            crate::query_ser::serialize_structure_crate_model_filter(entry_3307, item_3305)?;
        }
        list_3306.finish();
    }
    #[allow(unused_mut)]
    let mut scope_3308 = writer.prefix("ReservedInstancesId");
    if let Some(var_3309) = &input.reserved_instances_id {
        scope_3308.string(var_3309);
    }
    #[allow(unused_mut)]
    let mut scope_3310 = writer.prefix("ReservedInstancesListingId");
    if let Some(var_3311) = &input.reserved_instances_listing_id {
        scope_3310.string(var_3311);
    }
    writer.finish();
    Ok(aws_smithy_http::body::SdkBody::from(out))
}

pub fn serialize_operation_crate_operation_describe_reserved_instances_modifications(
    input: &crate::input::DescribeReservedInstancesModificationsInput,
) -> 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,
        "DescribeReservedInstancesModifications",
        "2016-11-15",
    );
    #[allow(unused_mut)]
    let mut scope_3312 = writer.prefix("Filter");
    if let Some(var_3313) = &input.filters {
        let mut list_3315 = scope_3312.start_list(true, Some("Filter"));
        for item_3314 in var_3313 {
            #[allow(unused_mut)]
            let mut entry_3316 = list_3315.entry();
            crate::query_ser::serialize_structure_crate_model_filter(entry_3316, item_3314)?;
        }
        list_3315.finish();
    }
    #[allow(unused_mut)]
    let mut scope_3317 = writer.prefix("ReservedInstancesModificationId");
    if let Some(var_3318) = &input.reserved_instances_modification_ids {
        let mut list_3320 = scope_3317.start_list(true, Some("ReservedInstancesModificationId"));
        for item_3319 in var_3318 {
            #[allow(unused_mut)]
            let mut entry_3321 = list_3320.entry();
            entry_3321.string(item_3319);
        }
        list_3320.finish();
    }
    #[allow(unused_mut)]
    let mut scope_3322 = writer.prefix("NextToken");
    if let Some(var_3323) = &input.next_token {
        scope_3322.string(var_3323);
    }
    writer.finish();
    Ok(aws_smithy_http::body::SdkBody::from(out))
}

pub fn serialize_operation_crate_operation_describe_reserved_instances_offerings(
    input: &crate::input::DescribeReservedInstancesOfferingsInput,
) -> 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,
        "DescribeReservedInstancesOfferings",
        "2016-11-15",
    );
    #[allow(unused_mut)]
    let mut scope_3324 = writer.prefix("AvailabilityZone");
    if let Some(var_3325) = &input.availability_zone {
        scope_3324.string(var_3325);
    }
    #[allow(unused_mut)]
    let mut scope_3326 = writer.prefix("Filter");
    if let Some(var_3327) = &input.filters {
        let mut list_3329 = scope_3326.start_list(true, Some("Filter"));
        for item_3328 in var_3327 {
            #[allow(unused_mut)]
            let mut entry_3330 = list_3329.entry();
            crate::query_ser::serialize_structure_crate_model_filter(entry_3330, item_3328)?;
        }
        list_3329.finish();
    }
    #[allow(unused_mut)]
    let mut scope_3331 = writer.prefix("IncludeMarketplace");
    if let Some(var_3332) = &input.include_marketplace {
        scope_3331.boolean(*var_3332);
    }
    #[allow(unused_mut)]
    let mut scope_3333 = writer.prefix("InstanceType");
    if let Some(var_3334) = &input.instance_type {
        scope_3333.string(var_3334.as_str());
    }
    #[allow(unused_mut)]
    let mut scope_3335 = writer.prefix("MaxDuration");
    if let Some(var_3336) = &input.max_duration {
        scope_3335.number(
            #[allow(clippy::useless_conversion)]
            aws_smithy_types::Number::NegInt((*var_3336).into()),
        );
    }
    #[allow(unused_mut)]
    let mut scope_3337 = writer.prefix("MaxInstanceCount");
    if let Some(var_3338) = &input.max_instance_count {
        scope_3337.number(
            #[allow(clippy::useless_conversion)]
            aws_smithy_types::Number::NegInt((*var_3338).into()),
        );
    }
    #[allow(unused_mut)]
    let mut scope_3339 = writer.prefix("MinDuration");
    if let Some(var_3340) = &input.min_duration {
        scope_3339.number(
            #[allow(clippy::useless_conversion)]
            aws_smithy_types::Number::NegInt((*var_3340).into()),
        );
    }
    #[allow(unused_mut)]
    let mut scope_3341 = writer.prefix("OfferingClass");
    if let Some(var_3342) = &input.offering_class {
        scope_3341.string(var_3342.as_str());
    }
    #[allow(unused_mut)]
    let mut scope_3343 = writer.prefix("ProductDescription");
    if let Some(var_3344) = &input.product_description {
        scope_3343.string(var_3344.as_str());
    }
    #[allow(unused_mut)]
    let mut scope_3345 = writer.prefix("ReservedInstancesOfferingId");
    if let Some(var_3346) = &input.reserved_instances_offering_ids {
        let mut list_3348 = scope_3345.start_list(true, None);
        for item_3347 in var_3346 {
            #[allow(unused_mut)]
            let mut entry_3349 = list_3348.entry();
            entry_3349.string(item_3347);
        }
        list_3348.finish();
    }
    #[allow(unused_mut)]
    let mut scope_3350 = writer.prefix("DryRun");
    if let Some(var_3351) = &input.dry_run {
        scope_3350.boolean(*var_3351);
    }
    #[allow(unused_mut)]
    let mut scope_3352 = writer.prefix("InstanceTenancy");
    if let Some(var_3353) = &input.instance_tenancy {
        scope_3352.string(var_3353.as_str());
    }
    #[allow(unused_mut)]
    let mut scope_3354 = writer.prefix("MaxResults");
    if let Some(var_3355) = &input.max_results {
        scope_3354.number(
            #[allow(clippy::useless_conversion)]
            aws_smithy_types::Number::NegInt((*var_3355).into()),
        );
    }
    #[allow(unused_mut)]
    let mut scope_3356 = writer.prefix("NextToken");
    if let Some(var_3357) = &input.next_token {
        scope_3356.string(var_3357);
    }
    #[allow(unused_mut)]
    let mut scope_3358 = writer.prefix("OfferingType");
    if let Some(var_3359) = &input.offering_type {
        scope_3358.string(var_3359.as_str());
    }
    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 OfferingClassType

fn as_ref(&self) -> &str

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

impl Clone for OfferingClassType

fn clone(&self) -> OfferingClassType

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for OfferingClassType

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

Formats the value using the given formatter.

impl From<&str> for OfferingClassType

fn from(s: &str) -> Self

Converts to this type from the input type.

impl FromStr for OfferingClassType

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 OfferingClassType

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 OfferingClassType

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

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

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

impl StructuralEq for OfferingClassType

impl StructuralPartialEq for OfferingClassType