Enum fungui_syntax::Error

pub enum Error<T, R> {
    Unexpected(Info<T, R>),
    Expected(Info<T, R>),
    Message(Info<T, R>),
    Other(Box<dyn Error + 'static + Send + Sync>),
}

Enum used to store information about an error that has occurred during parsing.

Variants

Unexpected(Info<T, R>)

Error indicating an unexpected token has been encountered in the stream

Expected(Info<T, R>)

Error indicating that the parser expected something else

Message(Info<T, R>)

Generic message

Other(Box<dyn Error + 'static + Send + Sync>)

Variant for containing other types of errors

Methods

impl<T, R> Error<T, R>

pub fn map_token<F, U>(self, f: F) -> Error<U, R> where
    F: FnOnce(T) -> U, 

pub fn map_range<F, S>(self, f: F) -> Error<T, S> where
    F: FnOnce(R) -> S, 

impl<T, R> Error<T, R>

pub fn end_of_input() -> Error<T, R>

Returns the end_of_input error.

pub fn fmt_errors(
    errors: &[Error<T, R>],
    f: &mut Formatter
) -> Result<(), Error> where
    R: Display,
    T: Display, 

Formats a slice of errors in a human readable way.

let input = r"
  ,123
";
let result = spaces().silent().with(char('.').or(char('a')).or(digit()))
    .easy_parse(State::new(input));
let m = format!("{}", result.unwrap_err());
let expected = r"Parse error at line: 2, column: 3
Unexpected `,`
Expected `.`, `a` or `digit`
";
assert_eq!(m, expected);

Trait Implementations

impl<T, R> Display for Error<T, R> where
    R: Display,
    T: Display, 

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

Formats the value using the given formatter.

impl<Item, Range, Position> ParseError<Item, Range, Position> for Error<Item, Range> where
    Item: PartialEq<Item>,
    Position: Default,
    Range: PartialEq<Range>, 

type StreamError = Error<Item, Range>

fn empty(Position) -> Error<Item, Range>

Constructs an empty error.

fn from_error(
    Position,
    err: <Error<Item, Range> as ParseError<Item, Range, Position>>::StreamError
) -> Error<Item, Range>

Creates a ParseError from a single Self::StreamError

fn set_position(&mut self, _position: Position)

Sets the position of this ParseError

fn add(
    &mut self,
    err: <Error<Item, Range> as ParseError<Item, Range, Position>>::StreamError
)

Adds a StreamError to self.

fn set_expected<F>(
    self_: &mut Tracked<Error<Item, Range>>,
    info: <Error<Item, Range> as ParseError<Item, Range, Position>>::StreamError,
    f: F
) where
    F: FnOnce(&mut Tracked<Error<Item, Range>>), 

Sets info as the only Expected error of self

fn is_unexpected_end_of_input(&self) -> bool

fn into_other<T>(self) -> T where
    T: ParseError<Item, Range, Position>, 

Does a best-effort conversion of self into another ParseError

fn merge(self, other: Self) -> Self

Merges two errors. If they exist at the same position the errors of other are added to self (using the semantics of add). If they are not at the same position the error furthest ahead are returned, ignoring the other ParseError.

fn add_expected(&mut self, info: Info<Item, Range>)

fn add_unexpected(&mut self, info: Info<Item, Range>)

fn add_message(&mut self, info: Info<Item, Range>)

fn clear_expected(&mut self)

Removes any expected errors currently in self

impl<T, R, E> From<E> for Error<T, R> where
    E: Error + 'static + Send + Sync, 

fn from(e: E) -> Error<T, R>

Performs the conversion.

impl<T, R> PartialEq<Error<T, R>> for Error<T, R> where
    R: PartialEq<R>,
    T: PartialEq<T>, 

fn eq(&self, other: &Error<T, R>) -> bool

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

#[must_use]

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

This method tests for !=.

impl<T, R> Debug for Error<T, R> where
    R: Debug,
    T: Debug, 

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

Formats the value using the given formatter.

impl<Item, Range> StreamError<Item, Range> for Error<Item, Range> where
    Item: PartialEq<Item>,
    Range: PartialEq<Range>, 

fn unexpected_token(token: Item) -> Error<Item, Range>

fn unexpected_range(token: Range) -> Error<Item, Range>

fn unexpected_message<T>(msg: T) -> Error<Item, Range> where
    T: Display, 

fn unexpected_static_message(msg: &'static str) -> Error<Item, Range>

fn expected_token(token: Item) -> Error<Item, Range>

fn expected_range(token: Range) -> Error<Item, Range>

fn expected_message<T>(msg: T) -> Error<Item, Range> where
    T: Display, 

fn expected_static_message(msg: &'static str) -> Error<Item, Range>

fn message_message<T>(msg: T) -> Error<Item, Range> where
    T: Display, 

fn message_static_message(msg: &'static str) -> Error<Item, Range>

fn message_token(token: Item) -> Error<Item, Range>

fn message_range(token: Range) -> Error<Item, Range>

fn other<E>(err: E) -> Error<Item, Range> where
    E: Error + Send + Sync + 'static, 

fn into_other<T>(self) -> T where
    T: StreamError<Item, Range>, 

Converts self into a different StreamError type.

fn unexpected(info: Info<Item, Range>) -> Self

fn expected(info: Info<Item, Range>) -> Self

fn message(info: Info<Item, Range>) -> Self

fn end_of_input() -> Self