Struct Cause 

pub struct Cause {
    pub error: CapturedError,
    pub attachments: ThinVec<CapturedAttachment>,
}

A link in a Problem’s causation chain.

Fields

error: CapturedError

Error.

attachments: ThinVec<CapturedAttachment>

Attachments.

Implementations

impl Cause

pub fn new(error: CapturedError) -> Self

Constructor.

pub fn to_ref<'problem>( &'problem self, problem: &'problem Problem, depth: usize, ) -> CauseRef<'problem, CapturedError>

To a CauseRef.

Trait Implementations

impl Attachments for Cause

fn attachments(&self) -> impl Iterator<Item = &CapturedAttachment>

Iterate attachments.

fn attachments_of_type<'this, AttachmentT>( &'this self, ) -> impl Iterator<Item = &'this AttachmentT>

where AttachmentT: 'static,

Iterate attachments of a type.

fn attachment_of_type<AttachmentT>(&self) -> Option<&AttachmentT>

where AttachmentT: 'static,

First attachment of a type.

impl AttachmentsMut for Cause

fn attachments_mut(&mut self) -> impl Iterator<Item = &mut CapturedAttachment>

Iterate attachments.

fn attach<AttachmentT>(&mut self, attachment: AttachmentT)

where AttachmentT: 'static + Send + Sync,

Add an attachment.

fn attachments_of_type_mut<'this, AttachmentT>( &'this mut self, ) -> impl Iterator<Item = &'this mut AttachmentT>

where AttachmentT: 'static,

Iterate attachments of a type.

fn attachment_of_type_mut<AttachmentT>(&mut self) -> Option<&mut AttachmentT>

where AttachmentT: 'static,

First attachment of a type.

fn must_attachment_of_type_mut<AttachmentT, DefaultT>( &mut self, default: DefaultT, ) -> &mut AttachmentT

where AttachmentT: 'static + Send + Sync, DefaultT: FnOnce() -> AttachmentT,

First attachment of a type.

fn attach_once<AttachmentT>(&mut self, attachment: AttachmentT)

where AttachmentT: 'static + Send + Sync,

Add an attachment only if we don’t already have one of its type.

fn attach_location_once(&mut self)

Add a Location (via Location::caller) attachment if we don’t already have one.

fn attach_backtrace_once(&mut self)

Available on crate feature backtrace-external only.

Add a backtrace attachment if we don’t already have one.

impl Debug for Cause

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

Formats the value using the given formatter.

impl Errors for Cause

fn iter_errors_of_type<'this, ErrorT>( &'this self, ) -> impl Iterator<Item = &'this ErrorT>

where ErrorT: 'static + Error,

Iterate errors of a type.

fn error_of_type<ErrorT>(&self) -> Option<&ErrorT>

where ErrorT: 'static + Error,

The first error of a type.

fn has_error_of_type<ErrorT>(&self) -> bool

where ErrorT: 'static + Error,

Whether we have an error of a type.

fn error_for<ErrorT>(&self, error: &ErrorT) -> Option<&ErrorT>

where ErrorT: 'static + Error + PartialEq,

The first occurrence of an error.

fn has_error<ErrorT>(&self, error: &ErrorT) -> bool

where ErrorT: 'static + Error + PartialEq,

Whether we have an error.

impl<ErrorT> From<ErrorT> for Cause

where ErrorT: 'static + Error + Send + Sync,

fn from(error: ErrorT) -> Self

Converts to this type from the input type.

impl<'this> IntoIterator for &'this Cause

type Item = &'this (dyn Error + 'static)

The type of the elements being iterated over.

type IntoIter = ErrorSourceIterator<'this>

Which kind of iterator are we turning this into?

fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value.

impl IterateErrorSources for Cause

fn iter_sources<'this>(&'this self) -> ErrorSourceIterator<'this>

Iterate the Error::source chain.

impl PartialEq for Cause

fn eq(&self, other: &Self) -> 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 PartialOrd for Cause

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Eq for Cause