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

Fields

location: L

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

UnrecognizedEOF

Fields

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.

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

UnrecognizedToken

Fields

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.

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

ExtraToken

Fields

token: (L, T, L)

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

User

Fields

error: E

Custom error type.

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, 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()

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

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

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

👎Deprecated since 1.33.0: replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, demand: &mut Demand<'a>)

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

Provides type based access to context intended for error reports.

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

fn from(error: E) -> Self

Converts to this type from the input type.

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.

fn max(self, other: Self) -> Selfwhere
    Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Selfwhere
    Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Selfwhere
    Self: Sized + PartialOrd<Self>,

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: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

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: &Rhs) -> bool

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

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

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

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

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

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

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

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

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

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