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