Enum aws_sdk_servicequotas::types::PeriodUnit
source · #[non_exhaustive]pub enum PeriodUnit {
Day,
Hour,
Microsecond,
Millisecond,
Minute,
Second,
Week,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against PeriodUnit
, 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 periodunit = unimplemented!();
match periodunit {
PeriodUnit::Day => { /* ... */ },
PeriodUnit::Hour => { /* ... */ },
PeriodUnit::Microsecond => { /* ... */ },
PeriodUnit::Millisecond => { /* ... */ },
PeriodUnit::Minute => { /* ... */ },
PeriodUnit::Second => { /* ... */ },
PeriodUnit::Week => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when periodunit
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant PeriodUnit::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
PeriodUnit::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 PeriodUnit::NewFeature
is defined.
Specifically, when periodunit
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on PeriodUnit::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
Day
Hour
Microsecond
Millisecond
Minute
Second
Week
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 PeriodUnit
impl PeriodUnit
source§impl PeriodUnit
impl PeriodUnit
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 PeriodUnit
impl AsRef<str> for PeriodUnit
source§impl Clone for PeriodUnit
impl Clone for PeriodUnit
source§fn clone(&self) -> PeriodUnit
fn clone(&self) -> PeriodUnit
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for PeriodUnit
impl Debug for PeriodUnit
source§impl Display for PeriodUnit
impl Display for PeriodUnit
source§impl From<&str> for PeriodUnit
impl From<&str> for PeriodUnit
source§impl FromStr for PeriodUnit
impl FromStr for PeriodUnit
source§impl Hash for PeriodUnit
impl Hash for PeriodUnit
source§impl Ord for PeriodUnit
impl Ord for PeriodUnit
source§fn cmp(&self, other: &PeriodUnit) -> Ordering
fn cmp(&self, other: &PeriodUnit) -> 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 PeriodUnit
impl PartialEq for PeriodUnit
source§fn eq(&self, other: &PeriodUnit) -> bool
fn eq(&self, other: &PeriodUnit) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd for PeriodUnit
impl PartialOrd for PeriodUnit
source§fn partial_cmp(&self, other: &PeriodUnit) -> Option<Ordering>
fn partial_cmp(&self, other: &PeriodUnit) -> 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 PeriodUnit
impl StructuralPartialEq for PeriodUnit
Auto Trait Implementations§
impl Freeze for PeriodUnit
impl RefUnwindSafe for PeriodUnit
impl Send for PeriodUnit
impl Sync for PeriodUnit
impl Unpin for PeriodUnit
impl UnwindSafe for PeriodUnit
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