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OpaqueError

rama_error::extra

Struct OpaqueError 

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pub struct OpaqueError(/* private fields */);
Expand description

Rarely will you need OpaqueError, it can however be a useful last-resort in case you get weird higher-rank Lifetime issues…

Such lifetime issues often arise when using BoxError directly as the error for a BoxService.

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impl OpaqueError

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pub fn from_static_str(e: &'static str) -> Self

Create an opaque error from a static str.

Use this instead of "msg".context() or some other method that turns it into a BoxError… Because the std rust library turns this into a String otherwise…

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pub fn into_box_error(self) -> BoxError

Unwrap into the inner BoxError.

OpaqueError is a transparent BoxError wrapper, so this is free. This shadows the generic into_box_error added by ErrorExt trait.

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impl Debug for OpaqueError

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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 Display for OpaqueError

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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 Error for OpaqueError

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fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any. Read more
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fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

Read more
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fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

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fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)
Provides type-based access to context intended for error reports. Read more
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impl From<Infallible> for OpaqueError

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fn from(infallible: Infallible) -> Self

Converts to this type from the input type.

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Blanket Implementations§

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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<Error> ErrorExt for Error
where Error: Into<Box<dyn Error + Sync + Send>>,

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fn into_box_error(self) -> Box<dyn Error + Sync + Send>

Return self as BoxError without additional context.
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fn into_opaque_error(self) -> OpaqueError

Return self as OpaqueError without additional context. Read more
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fn context<M>(self, value: M) -> Box<dyn Error + Sync + Send>
where M: Debug + Display + Send + Sync + 'static,

Wrap the error in a context.
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fn context_hex<M>(self, value: M) -> Box<dyn Error + Sync + Send>
where M: Debug + Send + Sync + 'static,

Wrap the error in a context, using fmt::LowerHex as fmt::Debug and fmt::Display.
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fn context_debug<M>(self, value: M) -> Box<dyn Error + Sync + Send>
where M: Debug + Send + Sync + 'static,

Wrap the error in a context, using fmt::Debug as fmt::Display.
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fn context_field<M>( self, key: &'static str, value: M, ) -> Box<dyn Error + Sync + Send>
where M: Debug + Display + Send + Sync + 'static,

Wrap the error in a keyed context.
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fn context_str_field<M>( self, key: &'static str, value: M, ) -> Box<dyn Error + Sync + Send>
where M: Into<String>,

Same as Self::context_field but using a string-like value, this is useful in case you need to pass a string slice which is borrowed and thus cannot be passed as part of ’static error.
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fn context_hex_field<M>( self, key: &'static str, value: M, ) -> Box<dyn Error + Sync + Send>
where M: Debug + Send + Sync + 'static,

Wrap the error in a keyed context, using fmt::LowerHex as fmt::Debug and fmt::Display.
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fn context_debug_field<M>( self, key: &'static str, value: M, ) -> Box<dyn Error + Sync + Send>
where M: Debug + Send + Sync + 'static,

Wrap the error in a keyed context, using fmt::Debug as fmt::Display.
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fn with_context<C, F>(self, cb: F) -> Box<dyn Error + Sync + Send>
where C: Debug + Display + Send + Sync + 'static, F: FnOnce() -> C,

Lazily wrap the error with a context.
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fn with_context_hex<C, F>(self, cb: F) -> Box<dyn Error + Sync + Send>
where C: Debug + Send + Sync + 'static, F: FnOnce() -> C,

Lazily wrap the error with a context, using fmt::LowerHex as fmt::Debug and fmt::Display.
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fn with_context_debug<C, F>(self, cb: F) -> Box<dyn Error + Sync + Send>
where C: Debug + Send + Sync + 'static, F: FnOnce() -> C,

Lazily wrap the error with a context, using fmt::Debug as fmt::Display.
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fn with_context_field<C, F>( self, key: &'static str, cb: F, ) -> Box<dyn Error + Sync + Send>
where C: Debug + Display + Send + Sync + 'static, F: FnOnce() -> C,

Lazily wrap the error with keyed context.
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fn with_context_str_field<C, F>( self, key: &'static str, cb: F, ) -> Box<dyn Error + Sync + Send>
where C: Into<String>, F: FnOnce() -> C,

Same as Self::with_context_field but using a string-like value, this is useful in case you need to pass a string slice which is borrowed and thus cannot be passed as part of ’static error.
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fn with_context_hex_field<C, F>( self, key: &'static str, cb: F, ) -> Box<dyn Error + Sync + Send>
where C: Debug + Send + Sync + 'static, F: FnOnce() -> C,

Lazily wrap the error with keyed context using fmt::LowerHex as fmt::Debug and fmt::Display.
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fn with_context_debug_field<C, F>( self, key: &'static str, cb: F, ) -> Box<dyn Error + Sync + Send>
where C: Debug + Send + Sync + 'static, F: FnOnce() -> C,

Lazily wrap the error with keyed context using fmt::Debug as fmt::Display.
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fn backtrace(self) -> Box<dyn Error + Sync + Send>

Available on crate feature std only.
Add a Backtrace to the error.
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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, 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> ToString for T
where T: Display + ?Sized,

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fn to_string(&self) -> String

Converts the given value to a String. 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.