#[non_exhaustive]pub enum TermsEnforcementType {
None,
Unknown(UnknownVariantValue),
}Expand description
When writing a match expression against TermsEnforcementType, 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 termsenforcementtype = unimplemented!();
match termsenforcementtype {
TermsEnforcementType::None => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}The above code demonstrates that when termsenforcementtype represents
NewFeature, the execution path will lead to the second last match arm,
even though the enum does not contain a variant TermsEnforcementType::NewFeature
in the current version of SDK. The reason is that the variable other,
created by the @ operator, is bound to
TermsEnforcementType::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 TermsEnforcementType::NewFeature is defined.
Specifically, when termsenforcementtype represents NewFeature,
the execution path will hit the second last match arm as before by virtue of
calling as_str on TermsEnforcementType::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
None
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 TermsEnforcementType
impl TermsEnforcementType
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 TermsEnforcementType
impl AsRef<str> for TermsEnforcementType
Source§impl Clone for TermsEnforcementType
impl Clone for TermsEnforcementType
Source§fn clone(&self) -> TermsEnforcementType
fn clone(&self) -> TermsEnforcementType
1.0.0 · Source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source. Read moreSource§impl Debug for TermsEnforcementType
impl Debug for TermsEnforcementType
Source§impl Display for TermsEnforcementType
impl Display for TermsEnforcementType
Source§impl From<&str> for TermsEnforcementType
impl From<&str> for TermsEnforcementType
Source§impl FromStr for TermsEnforcementType
impl FromStr for TermsEnforcementType
Source§impl Hash for TermsEnforcementType
impl Hash for TermsEnforcementType
Source§impl Ord for TermsEnforcementType
impl Ord for TermsEnforcementType
Source§fn cmp(&self, other: &TermsEnforcementType) -> Ordering
fn cmp(&self, other: &TermsEnforcementType) -> 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 TermsEnforcementType
impl PartialEq for TermsEnforcementType
Source§impl PartialOrd for TermsEnforcementType
impl PartialOrd for TermsEnforcementType
impl Eq for TermsEnforcementType
impl StructuralPartialEq for TermsEnforcementType
Auto Trait Implementations§
impl Freeze for TermsEnforcementType
impl RefUnwindSafe for TermsEnforcementType
impl Send for TermsEnforcementType
impl Sync for TermsEnforcementType
impl Unpin for TermsEnforcementType
impl UnwindSafe for TermsEnforcementType
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