#[non_exhaustive]
pub enum ExecutionRoleIdentityConfig {
Disabled,
UserProfileName,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against ExecutionRoleIdentityConfig
, 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 executionroleidentityconfig = unimplemented!();
match executionroleidentityconfig {
ExecutionRoleIdentityConfig::Disabled => { /* ... */ },
ExecutionRoleIdentityConfig::UserProfileName => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when executionroleidentityconfig
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant ExecutionRoleIdentityConfig::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
ExecutionRoleIdentityConfig::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 ExecutionRoleIdentityConfig::NewFeature
is defined.
Specifically, when executionroleidentityconfig
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on ExecutionRoleIdentityConfig::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
Disabled
UserProfileName
Unknown(UnknownVariantValue)
Unknown
contains new variants that have been added since this code was generated.
Implementations§
Trait Implementations§
source§impl AsRef<str> for ExecutionRoleIdentityConfig
impl AsRef<str> for ExecutionRoleIdentityConfig
source§impl Clone for ExecutionRoleIdentityConfig
impl Clone for ExecutionRoleIdentityConfig
source§fn clone(&self) -> ExecutionRoleIdentityConfig
fn clone(&self) -> ExecutionRoleIdentityConfig
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for ExecutionRoleIdentityConfig
impl Debug for ExecutionRoleIdentityConfig
source§impl From<&str> for ExecutionRoleIdentityConfig
impl From<&str> for ExecutionRoleIdentityConfig
source§impl Hash for ExecutionRoleIdentityConfig
impl Hash for ExecutionRoleIdentityConfig
source§impl Ord for ExecutionRoleIdentityConfig
impl Ord for ExecutionRoleIdentityConfig
source§fn cmp(&self, other: &ExecutionRoleIdentityConfig) -> Ordering
fn cmp(&self, other: &ExecutionRoleIdentityConfig) -> Ordering
1.21.0 · source§fn max(self, other: Self) -> Selfwhere
Self: Sized,
fn max(self, other: Self) -> Selfwhere Self: Sized,
source§impl PartialEq<ExecutionRoleIdentityConfig> for ExecutionRoleIdentityConfig
impl PartialEq<ExecutionRoleIdentityConfig> for ExecutionRoleIdentityConfig
source§fn eq(&self, other: &ExecutionRoleIdentityConfig) -> bool
fn eq(&self, other: &ExecutionRoleIdentityConfig) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd<ExecutionRoleIdentityConfig> for ExecutionRoleIdentityConfig
impl PartialOrd<ExecutionRoleIdentityConfig> for ExecutionRoleIdentityConfig
source§fn partial_cmp(&self, other: &ExecutionRoleIdentityConfig) -> Option<Ordering>
fn partial_cmp(&self, other: &ExecutionRoleIdentityConfig) -> 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 ExecutionRoleIdentityConfig
impl StructuralEq for ExecutionRoleIdentityConfig
impl StructuralPartialEq for ExecutionRoleIdentityConfig
Auto Trait Implementations§
impl RefUnwindSafe for ExecutionRoleIdentityConfig
impl Send for ExecutionRoleIdentityConfig
impl Sync for ExecutionRoleIdentityConfig
impl Unpin for ExecutionRoleIdentityConfig
impl UnwindSafe for ExecutionRoleIdentityConfig
Blanket Implementations§
source§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,
source§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
key
and return true
if they are equal.