#[non_exhaustive]pub enum EfsAuthorizationConfigIam {
Disabled,
Enabled,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against EfsAuthorizationConfigIam
, 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 efsauthorizationconfigiam = unimplemented!();
match efsauthorizationconfigiam {
EfsAuthorizationConfigIam::Disabled => { /* ... */ },
EfsAuthorizationConfigIam::Enabled => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when efsauthorizationconfigiam
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant EfsAuthorizationConfigIam::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
EfsAuthorizationConfigIam::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 EfsAuthorizationConfigIam::NewFeature
is defined.
Specifically, when efsauthorizationconfigiam
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on EfsAuthorizationConfigIam::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
Disabled
Enabled
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 EfsAuthorizationConfigIam
impl EfsAuthorizationConfigIam
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 EfsAuthorizationConfigIam
impl AsRef<str> for EfsAuthorizationConfigIam
Source§impl Clone for EfsAuthorizationConfigIam
impl Clone for EfsAuthorizationConfigIam
Source§fn clone(&self) -> EfsAuthorizationConfigIam
fn clone(&self) -> EfsAuthorizationConfigIam
1.0.0 · Source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moreSource§impl Debug for EfsAuthorizationConfigIam
impl Debug for EfsAuthorizationConfigIam
Source§impl Display for EfsAuthorizationConfigIam
impl Display for EfsAuthorizationConfigIam
Source§impl From<&str> for EfsAuthorizationConfigIam
impl From<&str> for EfsAuthorizationConfigIam
Source§impl FromStr for EfsAuthorizationConfigIam
impl FromStr for EfsAuthorizationConfigIam
Source§impl Hash for EfsAuthorizationConfigIam
impl Hash for EfsAuthorizationConfigIam
Source§impl Ord for EfsAuthorizationConfigIam
impl Ord for EfsAuthorizationConfigIam
Source§fn cmp(&self, other: &EfsAuthorizationConfigIam) -> Ordering
fn cmp(&self, other: &EfsAuthorizationConfigIam) -> Ordering
1.21.0 · Source§fn max(self, other: Self) -> Selfwhere
Self: Sized,
fn max(self, other: Self) -> Selfwhere
Self: Sized,
Source§impl PartialOrd for EfsAuthorizationConfigIam
impl PartialOrd for EfsAuthorizationConfigIam
impl Eq for EfsAuthorizationConfigIam
impl StructuralPartialEq for EfsAuthorizationConfigIam
Auto Trait Implementations§
impl Freeze for EfsAuthorizationConfigIam
impl RefUnwindSafe for EfsAuthorizationConfigIam
impl Send for EfsAuthorizationConfigIam
impl Sync for EfsAuthorizationConfigIam
impl Unpin for EfsAuthorizationConfigIam
impl UnwindSafe for EfsAuthorizationConfigIam
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