[−][src]Trait ttk91::parsing::Parser

pub trait Parser<T> {
    type Stream: SeekStream<Item = (T, Span)>;
    fn stream(&self) -> &Self::Stream;

    fn stream_mut(&mut self) -> &mut Self::Stream;

    fn boundary_right(&mut self) -> usize { ... }

    fn boundary_left(&mut self) -> usize { ... }

    fn apply<P, O, C>(&mut self, op: P) -> Result<O, ParseError<C, T>>
    where
        Self: Sized,
        P: Operation<Self, O, C, T>,
    { ... }

    fn take_token<X>(&mut self, token: T) -> Result<T, ParseError<X, T>>
    where
        T: Display + PartialEq,
        Self: Sized,
    { ... }

    fn assert_token<X>(&mut self, token: T) -> Result<(), ParseError<X, T>>
    where
        T: Display + PartialEq,
        Self: Sized,
    { ... }
}

Trait which provides convinience methods for parsers operating on SeekStreams of tokens and their Spans.

Associated Types

type Stream: SeekStream<Item = (T, Span)>

The token stream type on which the parser operates.

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Required methods

fn stream(&self) -> &Self::Stream

Returns an immutable reference to the stream.

fn stream_mut(&mut self) -> &mut Self::Stream

Returns a mutable reference to the stream.

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Provided methods

fn boundary_right(&mut self) -> usize

Returns the start offset of the next token. Can be used together with Parser::boundary_left to find the span of a token stream.

fn boundary_left(&mut self) -> usize

Returns the ending offset of the previous token. Can be used together with Parser::boundary_right to find the span of a token stream.

fn apply<P, O, C>(&mut self, op: P) -> Result<O, ParseError<C, T>> where
    Self: Sized,
    P: Operation<Self, O, C, T>, 

Applies the given parsing operation to the token stream, returning it's result. If the operation fails, reverts the token stream to its original position.

fn take_token<X>(&mut self, token: T) -> Result<T, ParseError<X, T>> where
    T: Display + PartialEq,
    Self: Sized, 

Consumes the specified token from the token stream and returns it. If the next token in the stream is not the wanted token, returns an error.

fn assert_token<X>(&mut self, token: T) -> Result<(), ParseError<X, T>> where
    T: Display + PartialEq,
    Self: Sized, 

Consumes the specified token from the token stream. If the next token in the stream is not the wanted token, returns an error.

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Implementations on Foreign Types

impl<'_, P, T> Parser<T> for &'_ mut P where
    P: Parser<T>, [src]

type Stream = P::Stream

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Implementors

impl<'a, T> Parser<Token<'a>> for Parser<'a, T>[src]

type Stream = BufferedStream<SpannedIter<'a, Token<'a>>>

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