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## SubdiagMessage

# Enum SubdiagMessage

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    pub enum SubdiagMessage {
        Str(Cow<'static, str>),
        FluentIdentifier(Cow<'static, str>),
        Inline(Cow<'static, str>),
        FluentAttr(Cow<'static, str>),
    }

Expand description

Abstraction over a message in a subdiagnostic (i.e. label, note, help, etc) to support both translatable and non-translatable diagnostic messages.

Translatable messages for subdiagnostics are typically attributes attached to a larger Fluent message so messages of this type must be combined with a `DiagMessage` (using `DiagMessage::with_subdiagnostic_message`) before rendering. However, subdiagnostics from the `Subdiagnostic` derive refer to Fluent identifiers directly.

## Variants§

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### Str(Cow<'static, str>)

Non-translatable diagnostic message.

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### FluentIdentifier(Cow<'static, str>)

Identifier of a Fluent message. Instances of this variant are generated by the `Subdiagnostic` derive.

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### Inline(Cow<'static, str>)

An inline Fluent message. Instances of this variant are generated by the `Subdiagnostic` derive.

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### FluentAttr(Cow<'static, str>)

Attribute of a Fluent message. Needs to be combined with a Fluent identifier to produce an actual translated message. Instances of this variant are generated by the `fluent_messages` macro.

https://projectfluent.org/fluent/guide/attributes.html

## Trait Implementations§

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### impl From<&'static str> for SubdiagMessage

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#### fn from(s: &'static str) -> Self

Converts to this type from the input type.
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### impl From<Cow<'static, str>> for SubdiagMessage

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#### fn from(s: Cow<'static, str>) -> Self

Converts to this type from the input type.
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### impl From<DiagMessage> for SubdiagMessage

Translating into a subdiagnostic message from a diagnostic message is a little strange - but the subdiagnostic functions (e.g. `span_label`) take a `SubdiagMessage` and the subdiagnostic derive refers to typed identifiers that are `DiagMessage`s, so need to be able to convert between these, as much as they’ll be converted back into `DiagMessage` using `with_subdiagnostic_message` eventually. Don’t use this other than for the derive.

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#### fn from(val: DiagMessage) -> Self

Converts to this type from the input type.
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### impl From<String> for SubdiagMessage

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#### fn from(s: String) -> Self

Converts to this type from the input type.

## Auto Trait Implementations§

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### impl DynSend for SubdiagMessage

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### impl DynSync for SubdiagMessage

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### impl Freeze for SubdiagMessage

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### impl RefUnwindSafe for SubdiagMessage

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### impl Send for SubdiagMessage

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### impl Sync for SubdiagMessage

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### impl Unpin for SubdiagMessage

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### impl UnwindSafe for SubdiagMessage

## Blanket Implementations§

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### impl<T> Aligned for T

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#### const ALIGN: Alignment

Alignment of `Self`.
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### impl<T> Any for T
where T: 'static + ?Sized,

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#### fn type_id(&self) -> TypeId

Gets the `TypeId` of `self`. Read more
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### impl<T> Borrow<T> for T
where T: ?Sized,

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#### fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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### impl<T> BorrowMut<T> for T
where T: ?Sized,

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#### fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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### impl<T> From<T> for T

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#### fn from(t: T) -> T

Returns the argument unchanged.

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### impl<T> Instrument for T

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#### fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided `Span`, returning an `Instrumented` wrapper. Read more
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#### fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current `Span`, returning an `Instrumented` wrapper. Read more
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### impl<T, U> Into<U> for T
where U: From<T>,

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#### fn into(self) -> U

Calls `U::from(self)`.

That is, this conversion is whatever the implementation of `From<T> for U` chooses to do.

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### impl<T> IntoEither for T

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#### fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts `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 more
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#### fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts `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
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### impl<T> Pointable for T

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#### const ALIGN: usize

The alignment of pointer.
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#### type Init = T

The type for initializers.
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#### unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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#### unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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#### unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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#### unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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### impl<T> Same for T

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#### type Output = T

Should always be `Self`
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### impl<T, U> TryFrom<U> for T
where U: Into<T>,

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#### type Error = Infallible

The type returned in the event of a conversion error.
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#### fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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### impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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#### type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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#### fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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### impl<T> WithSubscriber for T

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#### fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided `Subscriber` to this type, returning a `WithDispatch` wrapper. Read more
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#### fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default `Subscriber` to this type, returning a `WithDispatch` wrapper. Read more
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### impl<T> ErasedDestructor for T
where T: 'static,

## Layout§

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain `repr(...)` attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 32 bytes

Size for each variant:

- `Str`: 24 bytes
- `FluentIdentifier`: 24 bytes
- `Inline`: 24 bytes
- `FluentAttr`: 24 bytes