Enum rustc_error_messages::DiagnosticMessage

pub enum DiagnosticMessage {
    Str(String),
    FluentIdentifier(Cow<'static, str>, Option<Cow<'static, str>>),
}

Abstraction over a message in a diagnostic to support both translatable and non-translatable diagnostic messages.

Intended to be removed once diagnostics are entirely translatable.

Variants

Str(String)

Non-translatable diagnostic message.

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

Identifier for a Fluent message (with optional attribute) corresponding to the diagnostic message.

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

Implementations

impl DiagnosticMessage

pub fn with_subdiagnostic_message(&self, sub: SubdiagnosticMessage) -> Self

Given a SubdiagnosticMessage which may contain a Fluent attribute, create a new DiagnosticMessage that combines that attribute with the Fluent identifier of self.

• If the SubdiagnosticMessage is non-translatable then return the message as a DiagnosticMessage.
• If self is non-translatable then return self’s message.

pub fn expect_str(&self) -> &str

Returns the String contained within the DiagnosticMessage::Str variant, assuming that this diagnostic message is of the legacy, non-translatable variety. Panics if this assumption does not hold.

Don’t use this - it exists to support some places that do comparison with diagnostic strings.

Trait Implementations

impl Clone for DiagnosticMessage

fn clone(&self) -> DiagnosticMessage

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for DiagnosticMessage

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<__D: Decoder> Decodable<__D> for DiagnosticMessage

fn decode(__decoder: &mut __D) -> Self

impl<__E: Encoder> Encodable<__E> for DiagnosticMessage

fn encode(&self, __encoder: &mut __E)

impl<S: Into<String>> From<S> for DiagnosticMessage

From impl that enables existing diagnostic calls to functions which now take impl Into<DiagnosticMessage> to continue to work as before.

fn from(s: S) -> Self

Converts to this type from the input type.

impl Hash for DiagnosticMessage

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)where
    H: Hasher,

Feeds a slice of this type into the given Hasher.

impl Into<SubdiagnosticMessage> for DiagnosticMessage

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

fn into(self) -> SubdiagnosticMessage

Converts this type into the (usually inferred) input type.

impl PartialEq<DiagnosticMessage> for DiagnosticMessage

fn eq(&self, other: &DiagnosticMessage) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for DiagnosticMessage

impl StructuralEq for DiagnosticMessage

impl StructuralPartialEq for DiagnosticMessage

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: 56 bytes

Size for each variant:

• Str: 24 bytes
• FluentIdentifier: 56 bytes