Enum nom_errors::NomErr

pub enum NomErr<E, F> {
    Error(E),
    Failure(F),
}

Variants

Error(E)

Failure(F)

Implementations

impl<E, F> NomErr<E, F>

pub fn map_err<X>(self, f: impl FnOnce(E) -> X) -> NomErr<X, F>

Examples found in repository

src/lib.rs (line 30)

    pub fn any_err<E>(self) -> NomErr<E, F> {
        self.map_err(|x| x)
    }
}

impl<E> NomErr<E, !> {
    pub fn any_fail<F>(self) -> NomErr<E, F> {
        self.map_fail(|x| x)
    }
}

impl<E> NomErr<E, E> {
    pub fn fail(self) -> NomErr<!, E> {
        match self {
            NomErr::Error(e) => NomErr::Failure(e),
            NomErr::Failure(e) => NomErr::Failure(e),
        }
    }
}

impl<I, E, F> ParseError<I> for NomErr<E, F> {
    fn from_error_kind(_input: I, _kind: nom::error::ErrorKind) -> Self { panic!() }

    fn append(_input: I, _kind: nom::error::ErrorKind, _other: Self) -> Self { panic!() }

    fn or(self, _other: Self) -> Self { panic!() }

    fn from_char(_input: I, _: char) -> Self { panic!() }
}

pub type NomRes<I, O, E, F> = IResult<I, O, NomErr<E, F>>;

pub fn parser_from_result<I, O, E, F>(r: Result<(I, O), NomErr<E, F>>) -> NomRes<I, O, E, F> {
    match r {
        Ok((i, o)) => Ok((i, o)),
        Err(NomErr::Error(e)) => Err(nom::Err::Error(NomErr::Error(e))),
        Err(NomErr::Failure(f)) => Err(nom::Err::Failure(NomErr::Failure(f))),
    }
}

pub fn result_from_parser<I, O, E, F>(r: NomRes<I, O, E, F>) -> Result<(I, O), NomErr<E, F>> {
    match r {
        Ok((i, o)) => Ok((i, o)),
        Err(nom::Err::Error(NomErr::Error(e))) => Err(NomErr::Error(e)),
        Err(nom::Err::Failure(NomErr::Failure(e))) => Err(NomErr::Failure(e)),
        _ => panic!()
    }
}

pub fn map_err<I: Clone, O, E, F, X>(
    mut parser: impl FnMut(I) -> NomRes<I, O, E, F>,
    mut f: impl FnMut(E, I) -> X
) -> impl FnMut(I) -> NomRes<I, O, X, F> {
    move |input: I| {
        parser_from_result(result_from_parser(parser(input.clone())).map_err(|e| e.map_err(|e| f(e, input))))
    }
}

pub fn map_fail<X>(self, f: impl FnOnce(F) -> X) -> NomErr<E, X>

Examples found in repository

src/lib.rs (line 36)

    pub fn any_fail<F>(self) -> NomErr<E, F> {
        self.map_fail(|x| x)
    }

impl<F> NomErr<!, F>

pub fn any_err<E>(self) -> NomErr<E, F>

Examples found in repository

src/lib.rs (line 90)

pub fn any_err<I: Clone, O, F, X>(
    mut parser: impl FnMut(I) -> NomRes<I, O, !, F>,
) -> impl FnMut(I) -> NomRes<I, O, X, F> {
    move |input: I| parser_from_result(result_from_parser(parser(input.clone())).map_err(|e| e.any_err()))
}

impl<E> NomErr<E, !>

pub fn any_fail<F>(self) -> NomErr<E, F>

impl<E> NomErr<E, E>

pub fn fail(self) -> NomErr<!, E>

Trait Implementations

impl<E: Clone, F: Clone> Clone for NomErr<E, F>

fn clone(&self) -> NomErr<E, F>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<E: Debug, F: Debug> Debug for NomErr<E, F>

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

Formats the value using the given formatter.

impl<E: Hash, F: Hash> Hash for NomErr<E, F>

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

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

Feeds a slice of this type into the given Hasher.

impl<E: Ord, F: Ord> Ord for NomErr<E, F>

fn cmp(&self, other: &NomErr<E, F>) -> 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<I, E, F> ParseError<I> for NomErr<E, F>

fn from_error_kind(_input: I, _kind: ErrorKind) -> Self

Creates an error from the input position and an ErrorKind

fn append(_input: I, _kind: ErrorKind, _other: Self) -> Self

Combines an existing error with a new one created from the input position and an ErrorKind. This is useful when backtracking through a parse tree, accumulating error context on the way

fn or(self, _other: Self) -> Self

Combines two existing errors. This function is used to compare errors generated in various branches of alt.

fn from_char(_input: I, _: char) -> Self

Creates an error from an input position and an expected character

impl<E: PartialEq, F: PartialEq> PartialEq<NomErr<E, F>> for NomErr<E, F>

fn eq(&self, other: &NomErr<E, F>) -> 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<E: PartialOrd, F: PartialOrd> PartialOrd<NomErr<E, F>> for NomErr<E, F>

fn partial_cmp(&self, other: &NomErr<E, F>) -> 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<E: Copy, F: Copy> Copy for NomErr<E, F>

impl<E: Eq, F: Eq> Eq for NomErr<E, F>

impl<E, F> StructuralEq for NomErr<E, F>

impl<E, F> StructuralPartialEq for NomErr<E, F>