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