#[non_exhaustive]pub enum TargetPlatformArch {
    Arm64,
    ArmEabi,
    ArmEabihf,
    X86,
    X8664,
    Unknown(UnknownVariantValue),
}Expand description
When writing a match expression against TargetPlatformArch, 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 targetplatformarch = unimplemented!();
match targetplatformarch {
    TargetPlatformArch::Arm64 => { /* ... */ },
    TargetPlatformArch::ArmEabi => { /* ... */ },
    TargetPlatformArch::ArmEabihf => { /* ... */ },
    TargetPlatformArch::X86 => { /* ... */ },
    TargetPlatformArch::X8664 => { /* ... */ },
    other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
    _ => { /* ... */ },
}
The above code demonstrates that when targetplatformarch represents
NewFeature, the execution path will lead to the second last match arm,
even though the enum does not contain a variant TargetPlatformArch::NewFeature
in the current version of SDK. The reason is that the variable other,
created by the @ operator, is bound to
TargetPlatformArch::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 TargetPlatformArch::NewFeature is defined.
Specifically, when targetplatformarch represents NewFeature,
the execution path will hit the second last match arm as before by virtue of
calling as_str on TargetPlatformArch::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
Arm64
ArmEabi
ArmEabihf
X86
X8664
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 TargetPlatformArch
 
impl TargetPlatformArch
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 TargetPlatformArch
 
impl AsRef<str> for TargetPlatformArch
source§impl Clone for TargetPlatformArch
 
impl Clone for TargetPlatformArch
source§fn clone(&self) -> TargetPlatformArch
 
fn clone(&self) -> TargetPlatformArch
1.0.0 · source§fn clone_from(&mut self, source: &Self)
 
fn clone_from(&mut self, source: &Self)
source. Read moresource§impl Debug for TargetPlatformArch
 
impl Debug for TargetPlatformArch
source§impl From<&str> for TargetPlatformArch
 
impl From<&str> for TargetPlatformArch
source§impl FromStr for TargetPlatformArch
 
impl FromStr for TargetPlatformArch
source§impl Hash for TargetPlatformArch
 
impl Hash for TargetPlatformArch
source§impl Ord for TargetPlatformArch
 
impl Ord for TargetPlatformArch
source§fn cmp(&self, other: &TargetPlatformArch) -> Ordering
 
fn cmp(&self, other: &TargetPlatformArch) -> 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 TargetPlatformArch
 
impl PartialEq for TargetPlatformArch
source§fn eq(&self, other: &TargetPlatformArch) -> bool
 
fn eq(&self, other: &TargetPlatformArch) -> bool
self and other values to be equal, and is used
by ==.source§impl PartialOrd for TargetPlatformArch
 
impl PartialOrd for TargetPlatformArch
source§fn partial_cmp(&self, other: &TargetPlatformArch) -> Option<Ordering>
 
fn partial_cmp(&self, other: &TargetPlatformArch) -> 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 TargetPlatformArch
impl StructuralEq for TargetPlatformArch
impl StructuralPartialEq for TargetPlatformArch
Auto Trait Implementations§
impl RefUnwindSafe for TargetPlatformArch
impl Send for TargetPlatformArch
impl Sync for TargetPlatformArch
impl Unpin for TargetPlatformArch
impl UnwindSafe for TargetPlatformArch
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
§impl<Q, K> Comparable<K> for Q
 
impl<Q, K> Comparable<K> for Q
§impl<Q, K> Equivalent<K> for Q
 
impl<Q, K> Equivalent<K> for Q
§fn equivalent(&self, key: &K) -> bool
 
fn equivalent(&self, key: &K) -> bool
§impl<Q, K> Equivalent<K> for Q
 
impl<Q, K> Equivalent<K> for Q
§fn equivalent(&self, key: &K) -> bool
 
fn equivalent(&self, key: &K) -> bool
key and return true if they are equal.