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