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