Enum aws_sdk_mediaconvert::types::FontScript
source · #[non_exhaustive]pub enum FontScript {
Automatic,
Hans,
Hant,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against FontScript
, 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 fontscript = unimplemented!();
match fontscript {
FontScript::Automatic => { /* ... */ },
FontScript::Hans => { /* ... */ },
FontScript::Hant => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when fontscript
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant FontScript::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
FontScript::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 FontScript::NewFeature
is defined.
Specifically, when fontscript
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on FontScript::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. Provide the font script, using an ISO 15924 script code, if the LanguageCode is not sufficient for determining the script type. Where LanguageCode or CustomLanguageCode is sufficient, use “AUTOMATIC” or leave unset.
Variants (Non-exhaustive)§
This enum is marked as non-exhaustive
Automatic
Hans
Hant
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 FontScript
impl FontScript
source§impl FontScript
impl FontScript
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 FontScript
impl AsRef<str> for FontScript
source§impl Clone for FontScript
impl Clone for FontScript
source§fn clone(&self) -> FontScript
fn clone(&self) -> FontScript
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for FontScript
impl Debug for FontScript
source§impl Display for FontScript
impl Display for FontScript
source§impl From<&str> for FontScript
impl From<&str> for FontScript
source§impl FromStr for FontScript
impl FromStr for FontScript
source§impl Hash for FontScript
impl Hash for FontScript
source§impl Ord for FontScript
impl Ord for FontScript
source§fn cmp(&self, other: &FontScript) -> Ordering
fn cmp(&self, other: &FontScript) -> 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 FontScript
impl PartialEq for FontScript
source§fn eq(&self, other: &FontScript) -> bool
fn eq(&self, other: &FontScript) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd for FontScript
impl PartialOrd for FontScript
source§fn partial_cmp(&self, other: &FontScript) -> Option<Ordering>
fn partial_cmp(&self, other: &FontScript) -> 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 FontScript
impl StructuralPartialEq for FontScript
Auto Trait Implementations§
impl Freeze for FontScript
impl RefUnwindSafe for FontScript
impl Send for FontScript
impl Sync for FontScript
impl Unpin for FontScript
impl UnwindSafe for FontScript
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
source§impl<Q, K> Comparable<K> for Q
impl<Q, K> Comparable<K> for Q
source§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
source§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
source§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
key
and return true
if they are equal.source§impl<T> Instrument for T
impl<T> Instrument for T
source§fn instrument(self, span: Span) -> Instrumented<Self>
fn instrument(self, span: Span) -> Instrumented<Self>
source§fn in_current_span(self) -> Instrumented<Self>
fn in_current_span(self) -> Instrumented<Self>
source§impl<T> IntoEither for T
impl<T> IntoEither for T
source§fn into_either(self, into_left: bool) -> Either<Self, Self>
fn into_either(self, into_left: bool) -> Either<Self, Self>
self
into a Left
variant of Either<Self, Self>
if into_left
is true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read moresource§fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
self
into a Left
variant of Either<Self, Self>
if into_left(&self)
returns true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read more