#[non_exhaustive]
pub enum UrlTargetConfiguration {
NewTab,
NewWindow,
SameTab,
Unknown(UnknownVariantValue),
}Expand description
When writing a match expression against UrlTargetConfiguration, 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 urltargetconfiguration = unimplemented!();
match urltargetconfiguration {
UrlTargetConfiguration::NewTab => { /* ... */ },
UrlTargetConfiguration::NewWindow => { /* ... */ },
UrlTargetConfiguration::SameTab => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when urltargetconfiguration represents
NewFeature, the execution path will lead to the second last match arm,
even though the enum does not contain a variant UrlTargetConfiguration::NewFeature
in the current version of SDK. The reason is that the variable other,
created by the @ operator, is bound to
UrlTargetConfiguration::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 UrlTargetConfiguration::NewFeature is defined.
Specifically, when urltargetconfiguration represents NewFeature,
the execution path will hit the second last match arm as before by virtue of
calling as_str on UrlTargetConfiguration::NewFeature also yielding "NewFeature".
Explicitly matching on the Unknown variant should
be avoided for two reasons:
- The inner data
UnknownVariantValueis 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
NewTab
NewWindow
SameTab
Unknown(UnknownVariantValue)
Unknown contains new variants that have been added since this code was generated.
Implementations§
Trait Implementations§
source§impl AsRef<str> for UrlTargetConfiguration
impl AsRef<str> for UrlTargetConfiguration
source§impl Clone for UrlTargetConfiguration
impl Clone for UrlTargetConfiguration
source§fn clone(&self) -> UrlTargetConfiguration
fn clone(&self) -> UrlTargetConfiguration
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source. Read moresource§impl Debug for UrlTargetConfiguration
impl Debug for UrlTargetConfiguration
source§impl From<&str> for UrlTargetConfiguration
impl From<&str> for UrlTargetConfiguration
source§impl FromStr for UrlTargetConfiguration
impl FromStr for UrlTargetConfiguration
source§impl Hash for UrlTargetConfiguration
impl Hash for UrlTargetConfiguration
source§impl Ord for UrlTargetConfiguration
impl Ord for UrlTargetConfiguration
source§fn cmp(&self, other: &UrlTargetConfiguration) -> Ordering
fn cmp(&self, other: &UrlTargetConfiguration) -> Ordering
1.21.0 · source§fn max(self, other: Self) -> Selfwhere
Self: Sized,
fn max(self, other: Self) -> Selfwhere Self: Sized,
source§impl PartialEq<UrlTargetConfiguration> for UrlTargetConfiguration
impl PartialEq<UrlTargetConfiguration> for UrlTargetConfiguration
source§fn eq(&self, other: &UrlTargetConfiguration) -> bool
fn eq(&self, other: &UrlTargetConfiguration) -> bool
self and other values to be equal, and is used
by ==.source§impl PartialOrd<UrlTargetConfiguration> for UrlTargetConfiguration
impl PartialOrd<UrlTargetConfiguration> for UrlTargetConfiguration
source§fn partial_cmp(&self, other: &UrlTargetConfiguration) -> Option<Ordering>
fn partial_cmp(&self, other: &UrlTargetConfiguration) -> 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 UrlTargetConfiguration
impl StructuralEq for UrlTargetConfiguration
impl StructuralPartialEq for UrlTargetConfiguration
Auto Trait Implementations§
impl RefUnwindSafe for UrlTargetConfiguration
impl Send for UrlTargetConfiguration
impl Sync for UrlTargetConfiguration
impl Unpin for UrlTargetConfiguration
impl UnwindSafe for UrlTargetConfiguration
Blanket Implementations§
source§impl<Q, K> Equivalent<K> for Qwhere
Q: Eq + ?Sized,
K: Borrow<Q> + ?Sized,
impl<Q, K> Equivalent<K> for Qwhere Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,
source§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
key and return true if they are equal.