Enum pest::Error

pub enum Error<'i, R> {
    ParsingError {
        positives: Vec<R>,
        negatives: Vec<R>,
        pos: Position<'i>,
    },
    CustomErrorPos {
        message: String,
        pos: Position<'i>,
    },
    CustomErrorSpan {
        message: String,
        span: Span<'i>,
    },
}

An enum which defines possible errors.

Variants

ParsingError

Generated parsing error with expected and unexpected Rules and a position

Fields of ParsingError

positives: Vec<R>	Positive attempts
negatives: Vec<R>	Negative attempts
pos: Position<'i>	Deepest position of attempts

CustomErrorPos

Custom error with a message and a position

Fields of CustomErrorPos

message: String	Short explanation
pos: Position<'i>	Error Position for formatting

CustomErrorSpan

Custom error with a message and a span defined by a start and end position

Fields of CustomErrorSpan

message: String	Short explanation
span: Span<'i>	Error Span for formatting

Methods

impl<'i, R: RuleType> Error<'i, R>

fn renamed_rules<F>(self, f: F) -> Error<'i, R> where
    F: FnMut(&R) -> String, 

Renames all Rules from a ParsingError variant returning a CustomErrorPos. It does nothing when called on CustomErrorPos and CustomErrorSpan variants.

Useful in order to rename verbose rules or have detailed per-Rule formatting.

Examples

Error::ParsingError {
    positives: vec![Rule::open_paren],
    negatives: vec![Rule::closed_paren],
    pos: pos
}.renamed_rules(|rule| {
    match *rule {
        Rule::open_paren => "(".to_owned(),
        Rule::closed_paren => "closed paren".to_owned()
    }
});

Trait Implementations

impl<'i, R: Clone> Clone for Error<'i, R>

fn clone(&self) -> Error<'i, R>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'i, R: Debug> Debug for Error<'i, R>

fn fmt(&self, __arg_0: &mut Formatter) -> Result

Formats the value using the given formatter.

impl<'i, R: Eq> Eq for Error<'i, R>

impl<'i, R: Hash> Hash for Error<'i, R>

fn hash<__HR: Hasher>(&self, __arg_0: &mut __HR)

Feeds this value into the given [Hasher].

fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher, 

Feeds a slice of this type into the given [Hasher].

impl<'i, R: PartialEq> PartialEq for Error<'i, R>

fn eq(&self, __arg_0: &Error<'i, R>) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, __arg_0: &Error<'i, R>) -> bool

This method tests for !=.

impl<'i, R: Debug> Display for Error<'i, R>

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

Formats the value using the given formatter.

impl<'i, R: Debug> Error for Error<'i, R>

fn description(&self) -> &str

A short description of the error.

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

The lower-level cause of this error, if any.