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