#[non_exhaustive]pub enum ExportableLicenseField {
Show 22 variants
AccountId,
CurrentLicenseConfigurationInstanceType,
CurrentLicenseConfigurationLicenseEdition,
CurrentLicenseConfigurationLicenseModel,
CurrentLicenseConfigurationLicenseName,
CurrentLicenseConfigurationLicenseVersion,
CurrentLicenseConfigurationMetricsSource,
CurrentLicenseConfigurationNumberOfCores,
CurrentLicenseConfigurationOperatingSystem,
LicenseFinding,
LicenseFindingReasonCodes,
LastRefreshTimestamp,
LookbackPeriodInDays,
RecommendationOptionsEstimatedMonthlySavingsCurrency,
RecommendationOptionsEstimatedMonthlySavingsValue,
RecommendationOptionsLicenseEdition,
RecommendationOptionsLicenseModel,
RecommendationOptionsOperatingSystem,
RecommendationOptionsSavingsOpportunityPercentage,
ResourceArn,
Tags,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against ExportableLicenseField
, 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 exportablelicensefield = unimplemented!();
match exportablelicensefield {
ExportableLicenseField::AccountId => { /* ... */ },
ExportableLicenseField::CurrentLicenseConfigurationInstanceType => { /* ... */ },
ExportableLicenseField::CurrentLicenseConfigurationLicenseEdition => { /* ... */ },
ExportableLicenseField::CurrentLicenseConfigurationLicenseModel => { /* ... */ },
ExportableLicenseField::CurrentLicenseConfigurationLicenseName => { /* ... */ },
ExportableLicenseField::CurrentLicenseConfigurationLicenseVersion => { /* ... */ },
ExportableLicenseField::CurrentLicenseConfigurationMetricsSource => { /* ... */ },
ExportableLicenseField::CurrentLicenseConfigurationNumberOfCores => { /* ... */ },
ExportableLicenseField::CurrentLicenseConfigurationOperatingSystem => { /* ... */ },
ExportableLicenseField::LicenseFinding => { /* ... */ },
ExportableLicenseField::LicenseFindingReasonCodes => { /* ... */ },
ExportableLicenseField::LastRefreshTimestamp => { /* ... */ },
ExportableLicenseField::LookbackPeriodInDays => { /* ... */ },
ExportableLicenseField::RecommendationOptionsEstimatedMonthlySavingsCurrency => { /* ... */ },
ExportableLicenseField::RecommendationOptionsEstimatedMonthlySavingsValue => { /* ... */ },
ExportableLicenseField::RecommendationOptionsLicenseEdition => { /* ... */ },
ExportableLicenseField::RecommendationOptionsLicenseModel => { /* ... */ },
ExportableLicenseField::RecommendationOptionsOperatingSystem => { /* ... */ },
ExportableLicenseField::RecommendationOptionsSavingsOpportunityPercentage => { /* ... */ },
ExportableLicenseField::ResourceArn => { /* ... */ },
ExportableLicenseField::Tags => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when exportablelicensefield
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant ExportableLicenseField::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
ExportableLicenseField::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 ExportableLicenseField::NewFeature
is defined.
Specifically, when exportablelicensefield
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on ExportableLicenseField::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)§
This enum is marked as non-exhaustive
AccountId
CurrentLicenseConfigurationInstanceType
CurrentLicenseConfigurationLicenseEdition
CurrentLicenseConfigurationLicenseModel
CurrentLicenseConfigurationLicenseName
CurrentLicenseConfigurationLicenseVersion
CurrentLicenseConfigurationMetricsSource
CurrentLicenseConfigurationNumberOfCores
CurrentLicenseConfigurationOperatingSystem
LicenseFinding
LicenseFindingReasonCodes
LastRefreshTimestamp
LookbackPeriodInDays
RecommendationOptionsEstimatedMonthlySavingsCurrency
RecommendationOptionsEstimatedMonthlySavingsValue
RecommendationOptionsLicenseEdition
RecommendationOptionsLicenseModel
RecommendationOptionsOperatingSystem
RecommendationOptionsSavingsOpportunityPercentage
ResourceArn
Tags
Unknown(UnknownVariantValue)
Unknown
. See the docs on this enum for the correct way to handle unknown variants.Unknown
contains new variants that have been added since this code was generated.
Implementations§
source§impl ExportableLicenseField
impl ExportableLicenseField
sourcepub fn try_parse(value: &str) -> Result<Self, UnknownVariantError>
pub fn try_parse(value: &str) -> Result<Self, UnknownVariantError>
Parses the enum value while disallowing unknown variants.
Unknown variants will result in an error.
Trait Implementations§
source§impl AsRef<str> for ExportableLicenseField
impl AsRef<str> for ExportableLicenseField
source§impl Clone for ExportableLicenseField
impl Clone for ExportableLicenseField
source§fn clone(&self) -> ExportableLicenseField
fn clone(&self) -> ExportableLicenseField
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for ExportableLicenseField
impl Debug for ExportableLicenseField
source§impl From<&str> for ExportableLicenseField
impl From<&str> for ExportableLicenseField
source§impl FromStr for ExportableLicenseField
impl FromStr for ExportableLicenseField
source§impl Hash for ExportableLicenseField
impl Hash for ExportableLicenseField
source§impl Ord for ExportableLicenseField
impl Ord for ExportableLicenseField
source§fn cmp(&self, other: &ExportableLicenseField) -> Ordering
fn cmp(&self, other: &ExportableLicenseField) -> Ordering
1.21.0 · source§fn max(self, other: Self) -> Selfwhere
Self: Sized,
fn max(self, other: Self) -> Selfwhere
Self: Sized,
source§impl PartialEq for ExportableLicenseField
impl PartialEq for ExportableLicenseField
source§fn eq(&self, other: &ExportableLicenseField) -> bool
fn eq(&self, other: &ExportableLicenseField) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd for ExportableLicenseField
impl PartialOrd for ExportableLicenseField
source§fn partial_cmp(&self, other: &ExportableLicenseField) -> Option<Ordering>
fn partial_cmp(&self, other: &ExportableLicenseField) -> Option<Ordering>
1.0.0 · source§fn le(&self, other: &Rhs) -> bool
fn le(&self, other: &Rhs) -> bool
self
and other
) and is used by the <=
operator. Read moreimpl Eq for ExportableLicenseField
impl StructuralEq for ExportableLicenseField
impl StructuralPartialEq for ExportableLicenseField
Auto Trait Implementations§
impl RefUnwindSafe for ExportableLicenseField
impl Send for ExportableLicenseField
impl Sync for ExportableLicenseField
impl Unpin for ExportableLicenseField
impl UnwindSafe for ExportableLicenseField
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
§impl<Q, K> Comparable<K> for Q
impl<Q, K> Comparable<K> for Q
§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
key
and return true
if they are equal.