Enum lalrpop_util::ParseError

pub enum ParseError<L, T, E> {
    InvalidToken {
        location: L,
    },
    UnrecognizedEOF {
        location: L,
        expected: Vec<String>,
    },
    UnrecognizedToken {
        token: (L, T, L),
        expected: Vec<String>,
    },
    ExtraToken {
        token: (L, T, L),
    },
    User {
        error: E,
    },
}

Variants

InvalidToken

Generated by the parser when it encounters a token (or EOF) it did not expect.

Fields of InvalidToken

location: L

UnrecognizedEOF

Generated by the parser when it encounters an EOF it did not expect.

Fields of UnrecognizedEOF

location: L

The end of the final token

expected: Vec<String>

The set of expected tokens: these names are taken from the grammar and hence may not necessarily be suitable for presenting to the user.

UnrecognizedToken

Generated by the parser when it encounters a token it did not expect.

Fields of UnrecognizedToken

token: (L, T, L)

The unexpected token of type T with a span given by the two L values.

expected: Vec<String>

The set of expected tokens: these names are taken from the grammar and hence may not necessarily be suitable for presenting to the user.

ExtraToken

Generated by the parser when it encounters additional, unexpected tokens.

Fields of ExtraToken

token: (L, T, L)

User

Custom error type.

Fields of User

error: E

Implementations

impl<L, T, E> ParseError<L, T, E>

pub fn map_location<LL>(self, op: impl FnMut(L) -> LL) -> ParseError<LL, T, E>

pub fn map_token<TT>(self, op: impl FnOnce(T) -> TT) -> ParseError<L, TT, E>

pub fn map_error<EE>(self, op: impl FnOnce(E) -> EE) -> ParseError<L, T, EE>

Trait Implementations

impl<L: Clone, T: Clone, E: Clone> Clone for ParseError<L, T, E>

fn clone(&self) -> ParseError<L, T, E>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<L: Debug, T: Debug, E: Debug> Debug for ParseError<L, T, E>

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

Formats the value using the given formatter.

impl<L, T, E> Display for ParseError<L, T, E> where
    L: Display,
    T: Display,
    E: Display, 

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

Formats the value using the given formatter.

impl<L: Eq, T: Eq, E: Eq> Eq for ParseError<L, T, E>

impl<L, T, E> Error for ParseError<L, T, E> where
    L: Debug + Display,
    T: Debug + Display,
    E: Debug + Display, 

fn description(&self) -> &str

👎 Deprecated since 1.42.0:

use the Display impl or to_string()

if let Err(e) = "xc".parse::<u32>() { // Print e itself, no need for description(). eprintln!("Error: {}", e); }

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

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

fn backtrace(&self) -> Option<&Backtrace>

🔬 This is a nightly-only experimental API. (backtrace)

Returns a stack backtrace, if available, of where this error occurred.

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

👎 Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

impl<L, T, E> From<E> for ParseError<L, T, E>

fn from(error: E) -> Self

Performs the conversion.

impl<L: Ord, T: Ord, E: Ord> Ord for ParseError<L, T, E>

fn cmp(&self, other: &ParseError<L, T, E>) -> Ordering

This method returns an [Ordering] between self and other.

#[must_use]fn max(self, other: Self) -> Self

Compares and returns the maximum of two values.

#[must_use]fn min(self, other: Self) -> Self

Compares and returns the minimum of two values.

#[must_use]fn clamp(self, min: Self, max: Self) -> Self

🔬 This is a nightly-only experimental API. (clamp)

Restrict a value to a certain interval.

impl<L: PartialEq, T: PartialEq, E: PartialEq> PartialEq<ParseError<L, T, E>> for ParseError<L, T, E>

fn eq(&self, other: &ParseError<L, T, E>) -> bool

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

fn ne(&self, other: &ParseError<L, T, E>) -> bool

This method tests for !=.

impl<L: PartialOrd, T: PartialOrd, E: PartialOrd> PartialOrd<ParseError<L, T, E>> for ParseError<L, T, E>

fn partial_cmp(&self, other: &ParseError<L, T, E>) -> Option<Ordering>

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

fn lt(&self, other: &ParseError<L, T, E>) -> bool

This method tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &ParseError<L, T, E>) -> bool

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

fn gt(&self, other: &ParseError<L, T, E>) -> bool

This method tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &ParseError<L, T, E>) -> bool

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

impl<L, T, E> StructuralEq for ParseError<L, T, E>

impl<L, T, E> StructuralPartialEq for ParseError<L, T, E>