Struct combpop::combinators::Fail

pub struct Fail<I, O>(_);

Trait Implementations

impl<I, O> ParserBase for Fail<I, O>

type Input = I

The input type of the parser. u8 for byte-eating parsers.

type Output = O

The output type which this monadic parser produces.

fn emptiable() -> bool

Whether the parser "usually" accepts the empty sequence. Only used in emit_expectations.

fn map_once<O, F>(self, f: F) -> Map<O, Self, F> where
    Self: Sized,
    F: FnOnce(Self::Output) -> O, 

Converts a semantic value after parsing. Similar to ParserBase::map, but accepts FnOnce closures.

fn map_mut<O, F>(self, f: F) -> Map<O, Self, F> where
    Self: Sized,
    F: FnMut(Self::Output) -> O, 

Converts a semantic value after parsing. Similar to ParserBase::map, but accepts FnMut closures.

fn map<O, F>(self, f: F) -> Map<O, Self, F> where
    Self: Sized,
    F: Fn(Self::Output) -> O, 

Converts a semantic value after parsing.

fn and_then_once<P, F>(self, f: F) -> AndThen<Self, P, F> where
    Self: Sized,
    P: ParserBase<Input = Self::Input>,
    F: FnOnce(Self::Output) -> P, 

Monadic operator: run another parser f(x) after parsing. Similar to ParserBase::and_then, but accepts FnOnce closures.

fn and_then_mut<P, F>(self, f: F) -> AndThen<Self, P, F> where
    Self: Sized,
    P: ParserBase<Input = Self::Input>,
    F: FnMut(Self::Output) -> P, 

Monadic operator: run another parser f(x) after parsing. Similar to ParserBase::and_then, but accepts FnMut closures.

fn and_then<P, F>(self, f: F) -> AndThen<Self, P, F> where
    Self: Sized,
    P: ParserBase<Input = Self::Input>,
    F: Fn(Self::Output) -> P, 

Monadic operator: run another parser f(x) after parsing.

fn concat<P>(self, p: P) -> Concat2<Self, P> where
    Self: Sized,
    P: ParserBase<Input = Self::Input>, 

Applicative operator: run another parser p after parsing. The result is a pair of the result of the parsers.

fn or<P>(self, p: P) -> Choice2<Self, P> where
    Self: Sized,
    P: ParserBase<Input = Self::Input, Output = Self::Output>, 

If the parser failed without consumption, try another parser.

fn many1(self) -> Many1<Self> where
    Self: Sized, 

Returns a ParserIteratorBase that collects one or more objects from this parser.

impl<S: Stream<Item = I> + ?Sized, I, O> ParserOnce<S> for Fail<I, O>

fn parse_lookahead_once(
    self,
    _: &mut S
) -> ParseResult<Option<(Self::Output, Consume)>>

fn emit_expectations(&self, _: &mut S)

impl<S: Stream<Item = I> + ?Sized, I, O> ParserMut<S> for Fail<I, O>

fn parse_lookahead_mut(
    &mut self,
    _: &mut S
) -> ParseResult<Option<(Self::Output, Consume)>>

fn parse_mut(&mut self, stream: &mut S) -> ParseResult<Self::Output>

fn parse_consume_mut(
    &mut self,
    stream: &mut S
) -> ParseResult<(Self::Output, Consume)>

impl<S: Stream<Item = I> + ?Sized, I, O> Parser<S> for Fail<I, O>

fn parse_lookahead(
    &self,
    _: &mut S
) -> ParseResult<Option<(Self::Output, Consume)>>

fn parse(&self, stream: &mut S) -> ParseResult<Self::Output>

fn parse_consume(&self, stream: &mut S) -> ParseResult<(Self::Output, Consume)>