Enum rustc_error_messages::DiagMessage

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

Non-translatable diagnostic message.

Translated(Cow<'static, str>)

Translatable message which has been already translated.

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.

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

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

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

Implementations

impl DiagMessage

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

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

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

pub fn as_str(&self) -> Option<&str>

Trait Implementations

impl Clone for DiagMessage

fn clone(&self) -> DiagMessage

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for DiagMessage

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

Formats the value using the given formatter.

impl<__D: SpanDecoder> Decodable<__D> for DiagMessage

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

impl<__E: SpanEncoder> Encodable<__E> for DiagMessage

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

impl From<&'static str> for DiagMessage

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

Converts to this type from the input type.

impl From<Cow<'static, str>> for DiagMessage

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

Converts to this type from the input type.

impl From<String> for DiagMessage

fn from(s: String) -> Self

Converts to this type from the input type.

impl Hash for DiagMessage

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, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Into<SubdiagMessage> for DiagMessage

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.

fn into(self) -> SubdiagMessage

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

impl PartialEq for DiagMessage

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

Tests for self and other values to be equal, and is used by ==.

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

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

impl Eq for DiagMessage

impl StructuralPartialEq for DiagMessage

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: 48 bytes

Size for each variant:

• Str: 32 bytes
• Translated: 32 bytes
• FluentIdentifier: 48 bytes