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