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