#[non_exhaustive]pub enum KeyMaterialType {
KeyCryptogram,
RootPublicKeyCertificate,
Tr31KeyBlock,
Tr34KeyBlock,
TrustedPublicKeyCertificate,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against KeyMaterialType
, 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 keymaterialtype = unimplemented!();
match keymaterialtype {
KeyMaterialType::KeyCryptogram => { /* ... */ },
KeyMaterialType::RootPublicKeyCertificate => { /* ... */ },
KeyMaterialType::Tr31KeyBlock => { /* ... */ },
KeyMaterialType::Tr34KeyBlock => { /* ... */ },
KeyMaterialType::TrustedPublicKeyCertificate => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when keymaterialtype
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant KeyMaterialType::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
KeyMaterialType::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 KeyMaterialType::NewFeature
is defined.
Specifically, when keymaterialtype
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on KeyMaterialType::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
KeyCryptogram
RootPublicKeyCertificate
Tr31KeyBlock
Tr34KeyBlock
TrustedPublicKeyCertificate
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 KeyMaterialType
impl KeyMaterialType
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 KeyMaterialType
impl AsRef<str> for KeyMaterialType
Source§impl Clone for KeyMaterialType
impl Clone for KeyMaterialType
Source§fn clone(&self) -> KeyMaterialType
fn clone(&self) -> KeyMaterialType
1.0.0 · Source§const fn clone_from(&mut self, source: &Self)
const fn clone_from(&mut self, source: &Self)
source
. Read moreSource§impl Debug for KeyMaterialType
impl Debug for KeyMaterialType
Source§impl Display for KeyMaterialType
impl Display for KeyMaterialType
Source§impl From<&str> for KeyMaterialType
impl From<&str> for KeyMaterialType
Source§impl FromStr for KeyMaterialType
impl FromStr for KeyMaterialType
Source§impl Hash for KeyMaterialType
impl Hash for KeyMaterialType
Source§impl Ord for KeyMaterialType
impl Ord for KeyMaterialType
Source§fn cmp(&self, other: &KeyMaterialType) -> Ordering
fn cmp(&self, other: &KeyMaterialType) -> 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 KeyMaterialType
impl PartialEq for KeyMaterialType
Source§impl PartialOrd for KeyMaterialType
impl PartialOrd for KeyMaterialType
impl Eq for KeyMaterialType
impl StructuralPartialEq for KeyMaterialType
Auto Trait Implementations§
impl Freeze for KeyMaterialType
impl RefUnwindSafe for KeyMaterialType
impl Send for KeyMaterialType
impl Sync for KeyMaterialType
impl Unpin for KeyMaterialType
impl UnwindSafe for KeyMaterialType
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