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