Struct ErrorVariant

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struct ErrorVariant {
    name: Ident,
    fields: Vec<Ident>,
    has_location: bool,
    has_source: bool,
    has_external_cause: bool,
    display: TokenStream,
    transparent: bool,
    span: Span,
    cfg_attr: Option<Attribute>,
}

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§name: Ident§fields: Vec<Ident>§has_location: bool§has_source: bool§has_external_cause: bool§display: TokenStream§transparent: bool§span: Span§cfg_attr: Option<Attribute>

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impl ErrorVariant

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fn from_enum_variant(variant: Variant) -> Self

Construct self from Variant

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fn to_debug_match_arm(&self) -> TokenStream2

Convert self into an match arm that will be used in build_debug_impl.

The generated match arm will be like:

    ErrorKindWithSource { source, .. } => {
        debug_fmt(source, layer + 1, buf);
    },
    ErrorKindWithoutSource { .. } => {
       buf.push(format!("{layer}: {}, at {}", format!(#display), location)));
    }

The generated code assumes fn debug_fmt, var layer, var buf are in scope.

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fn to_next_match_arm(&self) -> TokenStream2

Convert self into an match arm that will be used in build_next_impl.

The generated match arm will be like:

    ErrorKindWithSource { source, .. } => {
        Some(source)
    },
    ErrorKindWithoutSource { .. } => {
       None
    }
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fn build_transparent_match_arm(&self) -> TokenStream2

Trait Implementations§

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impl Clone for ErrorVariant

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fn clone(&self) -> ErrorVariant

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for ErrorVariant

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

Formats the value using the given formatter. Read more

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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> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. 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> FromRef<T> for T
where T: Clone,

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fn from_ref(input: &T) -> T

Converts to this type from a reference to the input type.
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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> IntoRequest<T> for T

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fn into_request(self) -> Request<T>

Wrap the input message T in a tonic::Request
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impl<L> LayerExt<L> for L

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fn named_layer<S>(&self, service: S) -> Layered<<L as Layer<S>>::Service, S>
where L: Layer<S>,

Applies the layer to a service and wraps it in [Layered].
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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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