#[non_exhaustive]pub enum GeneratedTemplateStatus {
Complete,
CreateInProgress,
CreatePending,
DeleteInProgress,
DeletePending,
Failed,
UpdateInProgress,
UpdatePending,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against GeneratedTemplateStatus
, 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 generatedtemplatestatus = unimplemented!();
match generatedtemplatestatus {
GeneratedTemplateStatus::Complete => { /* ... */ },
GeneratedTemplateStatus::CreateInProgress => { /* ... */ },
GeneratedTemplateStatus::CreatePending => { /* ... */ },
GeneratedTemplateStatus::DeleteInProgress => { /* ... */ },
GeneratedTemplateStatus::DeletePending => { /* ... */ },
GeneratedTemplateStatus::Failed => { /* ... */ },
GeneratedTemplateStatus::UpdateInProgress => { /* ... */ },
GeneratedTemplateStatus::UpdatePending => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when generatedtemplatestatus
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant GeneratedTemplateStatus::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
GeneratedTemplateStatus::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 GeneratedTemplateStatus::NewFeature
is defined.
Specifically, when generatedtemplatestatus
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on GeneratedTemplateStatus::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
Complete
CreateInProgress
CreatePending
DeleteInProgress
DeletePending
Failed
UpdateInProgress
UpdatePending
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 GeneratedTemplateStatus
impl GeneratedTemplateStatus
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 GeneratedTemplateStatus
impl AsRef<str> for GeneratedTemplateStatus
source§impl Clone for GeneratedTemplateStatus
impl Clone for GeneratedTemplateStatus
source§fn clone(&self) -> GeneratedTemplateStatus
fn clone(&self) -> GeneratedTemplateStatus
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for GeneratedTemplateStatus
impl Debug for GeneratedTemplateStatus
source§impl Display for GeneratedTemplateStatus
impl Display for GeneratedTemplateStatus
source§impl From<&str> for GeneratedTemplateStatus
impl From<&str> for GeneratedTemplateStatus
source§impl FromStr for GeneratedTemplateStatus
impl FromStr for GeneratedTemplateStatus
source§impl Hash for GeneratedTemplateStatus
impl Hash for GeneratedTemplateStatus
source§impl Ord for GeneratedTemplateStatus
impl Ord for GeneratedTemplateStatus
source§fn cmp(&self, other: &GeneratedTemplateStatus) -> Ordering
fn cmp(&self, other: &GeneratedTemplateStatus) -> 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 GeneratedTemplateStatus
impl PartialEq for GeneratedTemplateStatus
source§fn eq(&self, other: &GeneratedTemplateStatus) -> bool
fn eq(&self, other: &GeneratedTemplateStatus) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd for GeneratedTemplateStatus
impl PartialOrd for GeneratedTemplateStatus
source§fn partial_cmp(&self, other: &GeneratedTemplateStatus) -> Option<Ordering>
fn partial_cmp(&self, other: &GeneratedTemplateStatus) -> 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 GeneratedTemplateStatus
impl StructuralPartialEq for GeneratedTemplateStatus
Auto Trait Implementations§
impl Freeze for GeneratedTemplateStatus
impl RefUnwindSafe for GeneratedTemplateStatus
impl Send for GeneratedTemplateStatus
impl Sync for GeneratedTemplateStatus
impl Unpin for GeneratedTemplateStatus
impl UnwindSafe for GeneratedTemplateStatus
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
source§impl<Q, K> Comparable<K> for Q
impl<Q, K> Comparable<K> for Q
source§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
source§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
source§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
key
and return true
if they are equal.source§impl<T> Instrument for T
impl<T> Instrument for T
source§fn instrument(self, span: Span) -> Instrumented<Self>
fn instrument(self, span: Span) -> Instrumented<Self>
source§fn in_current_span(self) -> Instrumented<Self>
fn in_current_span(self) -> Instrumented<Self>
source§impl<T> IntoEither for T
impl<T> IntoEither for T
source§fn into_either(self, into_left: bool) -> Either<Self, Self>
fn into_either(self, into_left: bool) -> Either<Self, Self>
self
into a Left
variant of Either<Self, Self>
if into_left
is true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read moresource§fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
self
into a Left
variant of Either<Self, Self>
if into_left(&self)
returns true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read more