Enum ParseError 

pub enum ParseError {
    Lex(LexError),
    TooDeep {
        offset: usize,
        depth: usize,
        limit: usize,
    },
    Syntax {
        offset: usize,
        expected: String,
        found: String,
    },
}

A malformed expression constraint.

Variants

Lex(LexError)

A character no token starts with.

TooDeep

The expression nests deeper than the parser will descend.

Fields

offset: usize

The byte offset of the bracket that crossed the limit.

depth: usize

The nesting depth reached there.

limit: usize

The deepest nesting the parser admits.

Syntax

The tokens do not form an expression constraint.

Fields

offset: usize

The byte offset where the parser stopped.

expected: String

The token class the grammar admits there.

found: String

The text found there, or “the end of the expression”.

Implementations

impl ParseError

pub fn offset(&self) -> usize

The byte offset the error points at.

Trait Implementations

impl Clone for ParseError

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ParseError

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

Formats the value using the given formatter.

impl Display for ParseError

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

Formats the value using the given formatter.

impl Eq for ParseError

impl Error for ParseError

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 ParseError

fn from(source: LexError) -> Self

Converts to this type from the input type.

impl PartialEq for ParseError

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for ParseError