Struct winnow::error::ContextError

pub struct ContextError<C = StrContext> { /* private fields */ }

Accumulate context while backtracking errors

Implementations

impl<C> ContextError<C>

pub fn new() -> Self

Create an empty error

pub fn context(&self) -> impl Iterator<Item = &C>

Available on crate feature alloc only.

Access context from Parser::context

pub fn cause(&self) -> Option<&(dyn Error + Send + Sync + 'static)>

Available on crate feature std only.

Originating std::error::Error

Trait Implementations

impl<C, I: Stream> AddContext<I, C> for ContextError<C>

fn add_context( self, _input: &I, _token_start: &<I as Stream>::Checkpoint, context: C ) -> Self

Append to an existing error custom data

impl<C: Clone> Clone for ContextError<C>

fn clone(&self) -> Self

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<C: Debug> Debug for ContextError<C>

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

Formats the value using the given formatter.

impl<C> Default for ContextError<C>

fn default() -> Self

Returns the “default value” for a type.

impl Display for ContextError<StrContext>

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

Formats the value using the given formatter.

impl<C> ErrorConvert<ContextError<C>> for ContextError<C>

fn convert(self) -> ContextError<C>

Transform to another error type

impl<C, I, E: Error + Send + Sync + 'static> FromExternalError<I, E> for ContextError<C>

Available on crate feature std only.

fn from_external_error(_input: &I, _kind: ErrorKind, e: E) -> Self

Like ParserError::from_error_kind but also include an external error.

impl<I: Stream, C> FromRecoverableError<I, ContextError<C>> for ContextError<C>

Available on crate feature unstable-recover only.

fn from_recoverable_error( _token_start: &<I as Stream>::Checkpoint, _err_start: &<I as Stream>::Checkpoint, _input: &I, e: Self ) -> Self

Capture context from when an error was recovered

impl<I: Stream, C> ParserError<I> for ContextError<C>

fn from_error_kind(_input: &I, _kind: ErrorKind) -> Self

Creates an error from the input position and an ErrorKind

fn append( self, _input: &I, _token_start: &<I as Stream>::Checkpoint, _kind: ErrorKind ) -> Self

Like ParserError::from_error_kind but merges it with the existing error.

fn or(self, other: Self) -> Self

Combines errors from two different parse branches.

fn assert(input: &I, _message: &'static str) -> Self

where I: Debug,

Process a parser assertion

impl<C: PartialEq> PartialEq for ContextError<C>

fn eq(&self, other: &Self) -> 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.