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