#[non_exhaustive]pub enum LaunchProfilePlatform {
Linux,
Windows,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against LaunchProfilePlatform
, 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 launchprofileplatform = unimplemented!();
match launchprofileplatform {
LaunchProfilePlatform::Linux => { /* ... */ },
LaunchProfilePlatform::Windows => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when launchprofileplatform
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant LaunchProfilePlatform::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
LaunchProfilePlatform::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 LaunchProfilePlatform::NewFeature
is defined.
Specifically, when launchprofileplatform
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on LaunchProfilePlatform::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
Linux
Windows
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 LaunchProfilePlatform
impl LaunchProfilePlatform
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 LaunchProfilePlatform
impl AsRef<str> for LaunchProfilePlatform
Source§impl Clone for LaunchProfilePlatform
impl Clone for LaunchProfilePlatform
Source§fn clone(&self) -> LaunchProfilePlatform
fn clone(&self) -> LaunchProfilePlatform
1.0.0 · Source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moreSource§impl Debug for LaunchProfilePlatform
impl Debug for LaunchProfilePlatform
Source§impl Display for LaunchProfilePlatform
impl Display for LaunchProfilePlatform
Source§impl From<&str> for LaunchProfilePlatform
impl From<&str> for LaunchProfilePlatform
Source§impl FromStr for LaunchProfilePlatform
impl FromStr for LaunchProfilePlatform
Source§impl Hash for LaunchProfilePlatform
impl Hash for LaunchProfilePlatform
Source§impl Ord for LaunchProfilePlatform
impl Ord for LaunchProfilePlatform
Source§fn cmp(&self, other: &LaunchProfilePlatform) -> Ordering
fn cmp(&self, other: &LaunchProfilePlatform) -> 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 LaunchProfilePlatform
impl PartialEq for LaunchProfilePlatform
Source§impl PartialOrd for LaunchProfilePlatform
impl PartialOrd for LaunchProfilePlatform
impl Eq for LaunchProfilePlatform
impl StructuralPartialEq for LaunchProfilePlatform
Auto Trait Implementations§
impl Freeze for LaunchProfilePlatform
impl RefUnwindSafe for LaunchProfilePlatform
impl Send for LaunchProfilePlatform
impl Sync for LaunchProfilePlatform
impl Unpin for LaunchProfilePlatform
impl UnwindSafe for LaunchProfilePlatform
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