Struct LexError 

pub struct LexError { /* private fields */ }

A tokenization failure and the source span that caused it.

Implementations

impl LexError

pub fn kind(&self) -> LexErrorKind

Returns the error class.

pub fn unclosed_expression(&self) -> Option<&'static str>

Returns the unclosed expression family for a missing group closer.

pub fn expected(&self) -> Option<&'static str>

Returns the token spelling required to complete this error.

pub fn found(&self) -> Option<&'static str>

Returns a readable description of what terminated this error.

Trait Implementations

impl Clone for LexError

fn clone(&self) -> LexError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for LexError

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

Formats the value using the given formatter.

impl Display for LexError

fn fmt(&self, formatter: &mut Formatter<'_>) -> FmtResult

Formats the value using the given formatter.

impl Eq for LexError

impl Error for LexError

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

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

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

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

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.

impl From<LexError> for FragmentParseError

fn from(error: LexError) -> Self

Converts to this type from the input type.

impl From<LexError> for ParseError

fn from(error: LexError) -> Self

Converts to this type from the input type.

impl Hash for LexError

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 PartialEq for LexError

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

Equality operator ==.

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

Inequality operator !=.

impl Spanned for LexError

fn try_span(&self) -> Option<Span>

Returns the smallest span covering this value, when its constituents share one source snapshot.

fn span(&self) -> Span

Returns the smallest span covering this value.

fn expect_span(&self) -> Span

Returns this value’s span when one source snapshot covers it.

impl StructuralPartialEq for LexError