SubdiagMessage

rustc_errors

Enum SubdiagMessage 

pub enum SubdiagMessage {
    Str(Cow<'static, str>),
    Translated(Cow<'static, str>),
    FluentIdentifier(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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Translated(Cow<'static, str>)

Translatable message which has already been translated eagerly.

Some diagnostics have repeated subdiagnostics where the same interpolated variables would be instantiated multiple times with different values. These subdiagnostics’ messages are translated when they are added to the parent diagnostic, producing this variant of DiagMessage.

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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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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) -> SubdiagMessage

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>) -> SubdiagMessage

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 DiagMessages, 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) -> SubdiagMessage

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) -> SubdiagMessage

Converts to this type from the input type.

Auto Trait Implementations§

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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Gets the TypeId of self. Read more
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fn borrow_mut(&mut self) -> &mut T

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

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const ALIGN: usize

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type Init = T

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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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Dereferences the given pointer. Read more
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type Output = T

Should always be Self
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type Error = Infallible

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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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type Error = <U as TryFrom<T>>::Error

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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
  • Translated: 24 bytes
  • FluentIdentifier: 24 bytes
  • FluentAttr: 24 bytes