#[non_exhaustive]pub enum MulticastFrameInfo {
Disabled,
Enabled,
Unknown(UnknownVariantValue),
}Expand description
When writing a match expression against MulticastFrameInfo, 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 multicastframeinfo = unimplemented!();
match multicastframeinfo {
MulticastFrameInfo::Disabled => { /* ... */ },
MulticastFrameInfo::Enabled => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when multicastframeinfo represents
NewFeature, the execution path will lead to the second last match arm,
even though the enum does not contain a variant MulticastFrameInfo::NewFeature
in the current version of SDK. The reason is that the variable other,
created by the @ operator, is bound to
MulticastFrameInfo::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 MulticastFrameInfo::NewFeature is defined.
Specifically, when multicastframeinfo represents NewFeature,
the execution path will hit the second last match arm as before by virtue of
calling as_str on MulticastFrameInfo::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.
FrameInfo of your multicast group resources for the trace content. Use
FrameInfo to debug the multicast communication between your multicast groups and the network server.
Variants (Non-exhaustive)§
This enum is marked as non-exhaustive
Disabled
Enabled
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 MulticastFrameInfo
impl MulticastFrameInfo
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 MulticastFrameInfo
impl AsRef<str> for MulticastFrameInfo
source§impl Clone for MulticastFrameInfo
impl Clone for MulticastFrameInfo
source§fn clone(&self) -> MulticastFrameInfo
fn clone(&self) -> MulticastFrameInfo
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source. Read moresource§impl Debug for MulticastFrameInfo
impl Debug for MulticastFrameInfo
source§impl From<&str> for MulticastFrameInfo
impl From<&str> for MulticastFrameInfo
source§impl FromStr for MulticastFrameInfo
impl FromStr for MulticastFrameInfo
source§impl Hash for MulticastFrameInfo
impl Hash for MulticastFrameInfo
source§impl Ord for MulticastFrameInfo
impl Ord for MulticastFrameInfo
source§fn cmp(&self, other: &MulticastFrameInfo) -> Ordering
fn cmp(&self, other: &MulticastFrameInfo) -> 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 MulticastFrameInfo
impl PartialEq for MulticastFrameInfo
source§fn eq(&self, other: &MulticastFrameInfo) -> bool
fn eq(&self, other: &MulticastFrameInfo) -> bool
self and other values to be equal, and is used
by ==.source§impl PartialOrd for MulticastFrameInfo
impl PartialOrd for MulticastFrameInfo
source§fn partial_cmp(&self, other: &MulticastFrameInfo) -> Option<Ordering>
fn partial_cmp(&self, other: &MulticastFrameInfo) -> 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 MulticastFrameInfo
impl StructuralEq for MulticastFrameInfo
impl StructuralPartialEq for MulticastFrameInfo
Auto Trait Implementations§
impl RefUnwindSafe for MulticastFrameInfo
impl Send for MulticastFrameInfo
impl Sync for MulticastFrameInfo
impl Unpin for MulticastFrameInfo
impl UnwindSafe for MulticastFrameInfo
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
§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,
§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
§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,
§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
key and return true if they are equal.