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