Trait nom::Parser

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pub trait Parser<I, O, E> {
    // Required method
    fn parse(&mut self, input: I) -> IResult<I, O, E>;

    // Provided methods
    fn map<G, O2>(self, g: G) -> Map<Self, G, O>
       where G: Fn(O) -> O2,
             Self: Sized { ... }
    fn flat_map<G, H, O2>(self, g: G) -> FlatMap<Self, G, O>
       where G: FnMut(O) -> H,
             H: Parser<I, O2, E>,
             Self: Sized { ... }
    fn and_then<G, O2>(self, g: G) -> AndThen<Self, G, O>
       where G: Parser<O, O2, E>,
             Self: Sized { ... }
    fn and<G, O2>(self, g: G) -> And<Self, G>
       where G: Parser<I, O2, E>,
             Self: Sized { ... }
    fn or<G>(self, g: G) -> Or<Self, G>
       where G: Parser<I, O, E>,
             Self: Sized { ... }
    fn into<O2: From<O>, E2: From<E>>(self) -> Into<Self, O, O2, E, E2>
       where Self: Sized { ... }
}
Expand description

All nom parsers implement this trait

Required Methods§

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fn parse(&mut self, input: I) -> IResult<I, O, E>

A parser takes in input type, and returns a Result containing either the remaining input and the output value, or an error

Provided Methods§

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fn map<G, O2>(self, g: G) -> Map<Self, G, O>
where G: Fn(O) -> O2, Self: Sized,

Maps a function over the result of a parser

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fn flat_map<G, H, O2>(self, g: G) -> FlatMap<Self, G, O>
where G: FnMut(O) -> H, H: Parser<I, O2, E>, Self: Sized,

Creates a second parser from the output of the first one, then apply over the rest of the input

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fn and_then<G, O2>(self, g: G) -> AndThen<Self, G, O>
where G: Parser<O, O2, E>, Self: Sized,

Applies a second parser over the output of the first one

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fn and<G, O2>(self, g: G) -> And<Self, G>
where G: Parser<I, O2, E>, Self: Sized,

Applies a second parser after the first one, return their results as a tuple

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fn or<G>(self, g: G) -> Or<Self, G>
where G: Parser<I, O, E>, Self: Sized,

Applies a second parser over the input if the first one failed

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fn into<O2: From<O>, E2: From<E>>(self) -> Into<Self, O, O2, E, E2>
where Self: Sized,

automatically converts the parser’s output and error values to another type, as long as they implement the From trait

Trait Implementations§

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impl<'a, I, O, E> Parser<I, O, E> for Box<dyn Parser<I, O, E> + 'a>

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fn parse(&mut self, input: I) -> IResult<I, O, E>

A parser takes in input type, and returns a Result containing either the remaining input and the output value, or an error
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fn map<G, O2>(self, g: G) -> Map<Self, G, O>
where G: Fn(O) -> O2, Self: Sized,

Maps a function over the result of a parser
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fn flat_map<G, H, O2>(self, g: G) -> FlatMap<Self, G, O>
where G: FnMut(O) -> H, H: Parser<I, O2, E>, Self: Sized,

Creates a second parser from the output of the first one, then apply over the rest of the input
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fn and_then<G, O2>(self, g: G) -> AndThen<Self, G, O>
where G: Parser<O, O2, E>, Self: Sized,

Applies a second parser over the output of the first one
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fn and<G, O2>(self, g: G) -> And<Self, G>
where G: Parser<I, O2, E>, Self: Sized,

Applies a second parser after the first one, return their results as a tuple
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fn or<G>(self, g: G) -> Or<Self, G>
where G: Parser<I, O, E>, Self: Sized,

Applies a second parser over the input if the first one failed
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fn into<O2: From<O>, E2: From<E>>(self) -> Into<Self, O, O2, E, E2>
where Self: Sized,

automatically converts the parser’s output and error values to another type, as long as they implement the From trait

Implementations on Foreign Types§

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impl<'a, I, O, E> Parser<I, O, E> for Box<dyn Parser<I, O, E> + 'a>

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fn parse(&mut self, input: I) -> IResult<I, O, E>

Implementors§

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impl<'a, I, O1, O2, E, F: Parser<I, O1, E>, G: Fn(O1) -> H, H: Parser<I, O2, E>> Parser<I, O2, E> for FlatMap<F, G, O1>

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impl<'a, I, O1, O2, E, F: Parser<I, O1, E>, G: Fn(O1) -> O2> Parser<I, O2, E> for Map<F, G, O1>

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impl<'a, I, O1, O2, E, F: Parser<I, O1, E>, G: Parser<I, O2, E>> Parser<I, (O1, O2), E> for And<F, G>

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impl<'a, I, O1, O2, E, F: Parser<I, O1, E>, G: Parser<O1, O2, E>> Parser<I, O2, E> for AndThen<F, G, O1>

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impl<'a, I, O, E, F> Parser<I, O, E> for F
where F: FnMut(I) -> IResult<I, O, E> + 'a,

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impl<'a, I: Clone, O1, O2: From<O1>, E1, E2: ParseError<I> + From<E1>, F: Parser<I, O1, E1>> Parser<I, O2, E2> for Into<F, O1, O2, E1, E2>

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impl<'a, I: Clone, O, E: ParseError<I>, F: Parser<I, O, E>, G: Parser<I, O, E>> Parser<I, O, E> for Or<F, G>