[−][src]Struct combine::stream::buffered::Stream
Stream
which buffers items from an instance of StreamOnce
into a ring buffer.
Instances of StreamOnce
which is not able to implement ResetStream
(such as ReadStream
) may
use this as a way to implement ResetStream
and become a full Stream
instance.
The drawback is that the buffer only stores a limited number of items which limits how many
tokens that can be reset and replayed. If a buffered::Stream
is reset past this limit an error
will be returned when uncons
is next called.
NOTE: If this stream is used in conjunction with an error enhancing stream such as
easy::Stream
(also via the easy_parser
method) it is recommended that the buffered::Stream
instance wraps the easy::Stream
instance instead of the other way around.
// DO buffered::Stream::new(easy::Stream(..), ..) // DON'T easy::Stream(buffered::Stream::new(.., ..)) parser.easy_parse(buffered::Stream::new(..));
Methods
impl<I> Stream<I> where
I: StreamOnce + Positioned,
I::Position: Clone,
I::Item: Clone,
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I: StreamOnce + Positioned,
I::Position: Clone,
I::Item: Clone,
pub fn new(iter: I, lookahead: usize) -> Stream<I>
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Constructs a new Stream
from a StreamOnce
instance with a lookahead
number of elements that can be stored in the buffer.
Trait Implementations
impl<I> Positioned for Stream<I> where
I: StreamOnce + Positioned,
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I: StreamOnce + Positioned,
impl<I> StreamOnce for Stream<I> where
I: StreamOnce + Positioned,
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I: StreamOnce + Positioned,
type Item = I::Item
The type of items which is yielded from this stream.
type Range = I::Range
The type of a range of items yielded from this stream. Types which do not a have a way of yielding ranges of items should just use the Self::Item
for this type. Read more
type Position = I::Position
Type which represents the position in a stream. Ord
is required to allow parsers to determine which of two positions are further ahead. Read more
type Error = I::Error
fn uncons(&mut self) -> Result<I::Item, StreamErrorFor<Self>>
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fn is_partial(&self) -> bool
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impl<I> ResetStream for Stream<I> where
I: Positioned,
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I: Positioned,
type Checkpoint = usize
fn checkpoint(&self) -> Self::Checkpoint
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fn reset(&mut self, checkpoint: Self::Checkpoint) -> Result<(), Self::Error>
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impl<I: PartialEq> PartialEq<Stream<I>> for Stream<I> where
I: StreamOnce + Positioned,
I::Item: PartialEq,
I::Position: PartialEq,
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I: StreamOnce + Positioned,
I::Item: PartialEq,
I::Position: PartialEq,
impl<I: Debug> Debug for Stream<I> where
I: StreamOnce + Positioned,
I::Item: Debug,
I::Position: Debug,
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I: StreamOnce + Positioned,
I::Item: Debug,
I::Position: Debug,
Auto Trait Implementations
impl<I> Send for Stream<I> where
I: Send,
<I as StreamOnce>::Item: Send,
<I as StreamOnce>::Position: Send,
I: Send,
<I as StreamOnce>::Item: Send,
<I as StreamOnce>::Position: Send,
impl<I> Sync for Stream<I> where
I: Sync,
<I as StreamOnce>::Item: Sync,
<I as StreamOnce>::Position: Sync,
I: Sync,
<I as StreamOnce>::Item: Sync,
<I as StreamOnce>::Position: Sync,
Blanket Implementations
impl<I> Stream for I where
I: StreamOnce + Positioned + ResetStream,
<I as StreamOnce>::Error: ParseError<<I as StreamOnce>::Item, <I as StreamOnce>::Range, <I as StreamOnce>::Position>,
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I: StreamOnce + Positioned + ResetStream,
<I as StreamOnce>::Error: ParseError<<I as StreamOnce>::Item, <I as StreamOnce>::Range, <I as StreamOnce>::Position>,
impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T> From<T> for T
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impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
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impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
ⓘImportant traits for &'_ mut Rfn borrow_mut(&mut self) -> &mut T
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impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,