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