Struct BEncoded 

pub struct BEncoded<'a> {
    pub data: &'a [u8],
    pub depth: i16,
}

Token iterator instance

Example

extern crate lazy_bencoding;
use lazy_bencoding::*;

let bencoded = BEncoded::new(&data[..]);
let name = bencoded.get(b"info").get(b"name").get_utf8_string();

You may now:

• iterate over bencoded to process all Token in order, or
• traverse the structure using get() and get_utf8_string().

Fields

data: &'a [u8]

Next data to parse, only a cheap reference and updated with each next()

depth: i16

Keeping track of the depth, for:

• traversing, and
• stopping after one item, before trailing data.

Implementations

impl<'a> BEncoded<'a>

pub fn new(data: &'a [u8]) -> Self

Construct from a pointer to data

Examples found in repository

examples/print_torrent.rs (line 70)

fn main() {
    for filename in env::args().skip(1) {
        let mut f = match File::open(&filename) {
            Ok(f) => f,
            Err(e) => {
                println!("{}: {:?}", filename, e);
                continue;
            }
        };
        let mut contents = Vec::new();
        f.read_to_end(&mut contents).unwrap();

        let bencoded = BEncoded::new(&contents[..]);
        pretty_print(bencoded, "");
    }
}

pub fn empty() -> BEncoded<'static>

Construct with empty data, used for when traversing fails

impl<'a> BEncoded<'a>

pub fn is_dict(&self) -> bool

Is the remaining data a dict?

Examples found in repository

examples/print_torrent.rs (line 33)

fn pretty_print<'a>(bencoded: BEncoded<'a>, padding: &str) {
    if let Some(s) = bencoded.get_utf8_string() {
        println!("{}{}", padding, s);
    } else if let Some(bs) = bencoded.get_byte_string() {
        // Hexdump
        let mut line = String::new();
        for (i, b) in bs.iter().enumerate() {
            line.push_str(&format!("{:02X}", b));
            if i & 15 == 0 {
                println!("{}{}", padding, line);
                line.clear();
            } else if i & 7 == 0 {
                line.push_str("   ");
            } else if i & 3 == 0 {
                line.push_str("  ");
            } else {
                line.push_str(" ");
            }
        }
        if line.len() > 0 {
            println!("{}{}", padding, line);
        }
    } else if let Some(i) = bencoded.get_integer() {
        println!("{}{}", padding, i);
    } else if bencoded.is_dict() {
        for (key, value) in bencoded.dict() {
            if let Some(key) = key.get_utf8_string() {
                println!("{}{}:", padding, key);
            } else {
                pretty_print(key, padding);
            }
            pretty_print(value, &format!("{}    ", padding));
        }
    } else if bencoded.is_list() {
        for (i, elem) in bencoded.list().enumerate() {
            let padding = if i == 0 {
                format!("{}  - ", padding)
            } else {
                let space_padding: String = padding.chars()
                    .map(|c| ' ').collect();
                format!("{}  - ", space_padding)
            };
            pretty_print(elem, &padding);
        }
    } else {
        println!("{}Weird tokens: {:?}", padding, bencoded.collect::<Vec<Token<'a>>>());
    }
}

pub fn is_list(&self) -> bool

Is the remaining data a list?

Examples found in repository

examples/print_torrent.rs (line 42)

fn pretty_print<'a>(bencoded: BEncoded<'a>, padding: &str) {
    if let Some(s) = bencoded.get_utf8_string() {
        println!("{}{}", padding, s);
    } else if let Some(bs) = bencoded.get_byte_string() {
        // Hexdump
        let mut line = String::new();
        for (i, b) in bs.iter().enumerate() {
            line.push_str(&format!("{:02X}", b));
            if i & 15 == 0 {
                println!("{}{}", padding, line);
                line.clear();
            } else if i & 7 == 0 {
                line.push_str("   ");
            } else if i & 3 == 0 {
                line.push_str("  ");
            } else {
                line.push_str(" ");
            }
        }
        if line.len() > 0 {
            println!("{}{}", padding, line);
        }
    } else if let Some(i) = bencoded.get_integer() {
        println!("{}{}", padding, i);
    } else if bencoded.is_dict() {
        for (key, value) in bencoded.dict() {
            if let Some(key) = key.get_utf8_string() {
                println!("{}{}:", padding, key);
            } else {
                pretty_print(key, padding);
            }
            pretty_print(value, &format!("{}    ", padding));
        }
    } else if bencoded.is_list() {
        for (i, elem) in bencoded.list().enumerate() {
            let padding = if i == 0 {
                format!("{}  - ", padding)
            } else {
                let space_padding: String = padding.chars()
                    .map(|c| ' ').collect();
                format!("{}  - ", space_padding)
            };
            pretty_print(elem, &padding);
        }
    } else {
        println!("{}Weird tokens: {:?}", padding, bencoded.collect::<Vec<Token<'a>>>());
    }
}

pub fn get_byte_string(&self) -> Option<&'a [u8]>

Is the remaining data a string? Then get it as a cheap slice.

Examples found in repository

examples/print_torrent.rs (line 12)

fn pretty_print<'a>(bencoded: BEncoded<'a>, padding: &str) {
    if let Some(s) = bencoded.get_utf8_string() {
        println!("{}{}", padding, s);
    } else if let Some(bs) = bencoded.get_byte_string() {
        // Hexdump
        let mut line = String::new();
        for (i, b) in bs.iter().enumerate() {
            line.push_str(&format!("{:02X}", b));
            if i & 15 == 0 {
                println!("{}{}", padding, line);
                line.clear();
            } else if i & 7 == 0 {
                line.push_str("   ");
            } else if i & 3 == 0 {
                line.push_str("  ");
            } else {
                line.push_str(" ");
            }
        }
        if line.len() > 0 {
            println!("{}{}", padding, line);
        }
    } else if let Some(i) = bencoded.get_integer() {
        println!("{}{}", padding, i);
    } else if bencoded.is_dict() {
        for (key, value) in bencoded.dict() {
            if let Some(key) = key.get_utf8_string() {
                println!("{}{}:", padding, key);
            } else {
                pretty_print(key, padding);
            }
            pretty_print(value, &format!("{}    ", padding));
        }
    } else if bencoded.is_list() {
        for (i, elem) in bencoded.list().enumerate() {
            let padding = if i == 0 {
                format!("{}  - ", padding)
            } else {
                let space_padding: String = padding.chars()
                    .map(|c| ' ').collect();
                format!("{}  - ", space_padding)
            };
            pretty_print(elem, &padding);
        }
    } else {
        println!("{}Weird tokens: {:?}", padding, bencoded.collect::<Vec<Token<'a>>>());
    }
}

pub fn get_utf8_string(&self) -> Option<&'a str>

Is the remaining data a string? Then get it as checked UTF-8.

Examples found in repository

examples/print_torrent.rs (line 10)

fn pretty_print<'a>(bencoded: BEncoded<'a>, padding: &str) {
    if let Some(s) = bencoded.get_utf8_string() {
        println!("{}{}", padding, s);
    } else if let Some(bs) = bencoded.get_byte_string() {
        // Hexdump
        let mut line = String::new();
        for (i, b) in bs.iter().enumerate() {
            line.push_str(&format!("{:02X}", b));
            if i & 15 == 0 {
                println!("{}{}", padding, line);
                line.clear();
            } else if i & 7 == 0 {
                line.push_str("   ");
            } else if i & 3 == 0 {
                line.push_str("  ");
            } else {
                line.push_str(" ");
            }
        }
        if line.len() > 0 {
            println!("{}{}", padding, line);
        }
    } else if let Some(i) = bencoded.get_integer() {
        println!("{}{}", padding, i);
    } else if bencoded.is_dict() {
        for (key, value) in bencoded.dict() {
            if let Some(key) = key.get_utf8_string() {
                println!("{}{}:", padding, key);
            } else {
                pretty_print(key, padding);
            }
            pretty_print(value, &format!("{}    ", padding));
        }
    } else if bencoded.is_list() {
        for (i, elem) in bencoded.list().enumerate() {
            let padding = if i == 0 {
                format!("{}  - ", padding)
            } else {
                let space_padding: String = padding.chars()
                    .map(|c| ' ').collect();
                format!("{}  - ", space_padding)
            };
            pretty_print(elem, &padding);
        }
    } else {
        println!("{}Weird tokens: {:?}", padding, bencoded.collect::<Vec<Token<'a>>>());
    }
}

pub fn get_integer(&self) -> Option<i64>

Is the remaining data an integer? If so, parse and return it.

Examples found in repository

examples/print_torrent.rs (line 31)

fn pretty_print<'a>(bencoded: BEncoded<'a>, padding: &str) {
    if let Some(s) = bencoded.get_utf8_string() {
        println!("{}{}", padding, s);
    } else if let Some(bs) = bencoded.get_byte_string() {
        // Hexdump
        let mut line = String::new();
        for (i, b) in bs.iter().enumerate() {
            line.push_str(&format!("{:02X}", b));
            if i & 15 == 0 {
                println!("{}{}", padding, line);
                line.clear();
            } else if i & 7 == 0 {
                line.push_str("   ");
            } else if i & 3 == 0 {
                line.push_str("  ");
            } else {
                line.push_str(" ");
            }
        }
        if line.len() > 0 {
            println!("{}{}", padding, line);
        }
    } else if let Some(i) = bencoded.get_integer() {
        println!("{}{}", padding, i);
    } else if bencoded.is_dict() {
        for (key, value) in bencoded.dict() {
            if let Some(key) = key.get_utf8_string() {
                println!("{}{}:", padding, key);
            } else {
                pretty_print(key, padding);
            }
            pretty_print(value, &format!("{}    ", padding));
        }
    } else if bencoded.is_list() {
        for (i, elem) in bencoded.list().enumerate() {
            let padding = if i == 0 {
                format!("{}  - ", padding)
            } else {
                let space_padding: String = padding.chars()
                    .map(|c| ' ').collect();
                format!("{}  - ", space_padding)
            };
            pretty_print(elem, &padding);
        }
    } else {
        println!("{}Weird tokens: {:?}", padding, bencoded.collect::<Vec<Token<'a>>>());
    }
}

pub fn this_and_rest(self) -> Option<(BEncoded<'a>, &'a [u8])>

Used by dict() and list()

Restricts the BEncoded<'a> to a single item (string, integer, list, or dict). Also returns the trailing data.

pub fn list(&self) -> ListIterator<'_>

If the remaining data is a list, return value fulfills Iterator<Item=BEncoded<'a>>

Examples found in repository

examples/print_torrent.rs (line 43)

fn pretty_print<'a>(bencoded: BEncoded<'a>, padding: &str) {
    if let Some(s) = bencoded.get_utf8_string() {
        println!("{}{}", padding, s);
    } else if let Some(bs) = bencoded.get_byte_string() {
        // Hexdump
        let mut line = String::new();
        for (i, b) in bs.iter().enumerate() {
            line.push_str(&format!("{:02X}", b));
            if i & 15 == 0 {
                println!("{}{}", padding, line);
                line.clear();
            } else if i & 7 == 0 {
                line.push_str("   ");
            } else if i & 3 == 0 {
                line.push_str("  ");
            } else {
                line.push_str(" ");
            }
        }
        if line.len() > 0 {
            println!("{}{}", padding, line);
        }
    } else if let Some(i) = bencoded.get_integer() {
        println!("{}{}", padding, i);
    } else if bencoded.is_dict() {
        for (key, value) in bencoded.dict() {
            if let Some(key) = key.get_utf8_string() {
                println!("{}{}:", padding, key);
            } else {
                pretty_print(key, padding);
            }
            pretty_print(value, &format!("{}    ", padding));
        }
    } else if bencoded.is_list() {
        for (i, elem) in bencoded.list().enumerate() {
            let padding = if i == 0 {
                format!("{}  - ", padding)
            } else {
                let space_padding: String = padding.chars()
                    .map(|c| ' ').collect();
                format!("{}  - ", space_padding)
            };
            pretty_print(elem, &padding);
        }
    } else {
        println!("{}Weird tokens: {:?}", padding, bencoded.collect::<Vec<Token<'a>>>());
    }
}

pub fn dict(&self) -> DictIterator<'_>

If the remaining data is a dict, return value fulfills Iterator<Item=(BEncoded<'a>, BEncoded<'a>)>

Examples found in repository

examples/print_torrent.rs (line 34)

fn pretty_print<'a>(bencoded: BEncoded<'a>, padding: &str) {
    if let Some(s) = bencoded.get_utf8_string() {
        println!("{}{}", padding, s);
    } else if let Some(bs) = bencoded.get_byte_string() {
        // Hexdump
        let mut line = String::new();
        for (i, b) in bs.iter().enumerate() {
            line.push_str(&format!("{:02X}", b));
            if i & 15 == 0 {
                println!("{}{}", padding, line);
                line.clear();
            } else if i & 7 == 0 {
                line.push_str("   ");
            } else if i & 3 == 0 {
                line.push_str("  ");
            } else {
                line.push_str(" ");
            }
        }
        if line.len() > 0 {
            println!("{}{}", padding, line);
        }
    } else if let Some(i) = bencoded.get_integer() {
        println!("{}{}", padding, i);
    } else if bencoded.is_dict() {
        for (key, value) in bencoded.dict() {
            if let Some(key) = key.get_utf8_string() {
                println!("{}{}:", padding, key);
            } else {
                pretty_print(key, padding);
            }
            pretty_print(value, &format!("{}    ", padding));
        }
    } else if bencoded.is_list() {
        for (i, elem) in bencoded.list().enumerate() {
            let padding = if i == 0 {
                format!("{}  - ", padding)
            } else {
                let space_padding: String = padding.chars()
                    .map(|c| ' ').collect();
                format!("{}  - ", space_padding)
            };
            pretty_print(elem, &padding);
        }
    } else {
        println!("{}Weird tokens: {:?}", padding, bencoded.collect::<Vec<Token<'a>>>());
    }
}

pub fn get(&'a self, wanted_key: &'a [u8]) -> Self

From a dict(), get the value of key wanted_key.

In case the key is not present, we return an empty instance. This allows chaining these calls conveniently:

let bencoded = BEncoded::new(b"d1:ad1:ad1:a4:spame1:bd1:a4:eggseee");
assert_eq!(bencoded.get(b"a").get(b"b").get(b"a").get_utf8_string(),
           Some("eggs"));

Trait Implementations

impl<'a> Clone for BEncoded<'a>

fn clone(&self) -> BEncoded<'a>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'a> Iterator for BEncoded<'a>

The token stream. Advances self.data and updates self.depth.

type Item = Token<'a>

The type of the elements being iterated over.

fn next(&mut self) -> Option<Self::Item>

Advances the iterator and returns the next value.

fn next_chunk<const N: usize>( &mut self, ) -> Result<[Self::Item; N], IntoIter<Self::Item, N>>

where Self: Sized,

🔬This is a nightly-only experimental API. (iter_next_chunk)

Advances the iterator and returns an array containing the next N values.

fn size_hint(&self) -> (usize, Option<usize>)

Returns the bounds on the remaining length of the iterator.

fn count(self) -> usize

where Self: Sized,

Consumes the iterator, counting the number of iterations and returning it.

fn last(self) -> Option<Self::Item>

where Self: Sized,

Consumes the iterator, returning the last element.

fn advance_by(&mut self, n: usize) -> Result<(), NonZero<usize>>

🔬This is a nightly-only experimental API. (iter_advance_by)

Advances the iterator by n elements.

fn nth(&mut self, n: usize) -> Option<Self::Item>

Returns the nth element of the iterator.

fn step_by(self, step: usize) -> StepBy<Self>

where Self: Sized,

Creates an iterator starting at the same point, but stepping by the given amount at each iteration.

fn chain<U>(self, other: U) -> Chain<Self, <U as IntoIterator>::IntoIter>

where Self: Sized, U: IntoIterator<Item = Self::Item>,

Takes two iterators and creates a new iterator over both in sequence.

fn zip<U>(self, other: U) -> Zip<Self, <U as IntoIterator>::IntoIter>

where Self: Sized, U: IntoIterator,

‘Zips up’ two iterators into a single iterator of pairs.

fn intersperse_with<G>(self, separator: G) -> IntersperseWith<Self, G>

where Self: Sized, G: FnMut() -> Self::Item,

🔬This is a nightly-only experimental API. (iter_intersperse)

Creates a new iterator which places an item generated by separator between adjacent items of the original iterator.

fn map<B, F>(self, f: F) -> Map<Self, F>

where Self: Sized, F: FnMut(Self::Item) -> B,

Takes a closure and creates an iterator which calls that closure on each element.

fn for_each<F>(self, f: F)

where Self: Sized, F: FnMut(Self::Item),

Calls a closure on each element of an iterator.

fn filter<P>(self, predicate: P) -> Filter<Self, P>

where Self: Sized, P: FnMut(&Self::Item) -> bool,

Creates an iterator which uses a closure to determine if an element should be yielded.

fn filter_map<B, F>(self, f: F) -> FilterMap<Self, F>

where Self: Sized, F: FnMut(Self::Item) -> Option<B>,

Creates an iterator that both filters and maps.

fn enumerate(self) -> Enumerate<Self>

where Self: Sized,

Creates an iterator which gives the current iteration count as well as the next value.

fn peekable(self) -> Peekable<Self>

where Self: Sized,

Creates an iterator which can use the peek and peek_mut methods to look at the next element of the iterator without consuming it. See their documentation for more information.

fn skip_while<P>(self, predicate: P) -> SkipWhile<Self, P>

where Self: Sized, P: FnMut(&Self::Item) -> bool,

Creates an iterator that skips elements based on a predicate.

fn take_while<P>(self, predicate: P) -> TakeWhile<Self, P>

where Self: Sized, P: FnMut(&Self::Item) -> bool,

Creates an iterator that yields elements based on a predicate.

fn map_while<B, P>(self, predicate: P) -> MapWhile<Self, P>

where Self: Sized, P: FnMut(Self::Item) -> Option<B>,

Creates an iterator that both yields elements based on a predicate and maps.

fn skip(self, n: usize) -> Skip<Self>

where Self: Sized,

Creates an iterator that skips the first n elements.

fn take(self, n: usize) -> Take<Self>

where Self: Sized,

Creates an iterator that yields the first n elements, or fewer if the underlying iterator ends sooner.

fn scan<St, B, F>(self, initial_state: St, f: F) -> Scan<Self, St, F>

where Self: Sized, F: FnMut(&mut St, Self::Item) -> Option<B>,

An iterator adapter which, like fold, holds internal state, but unlike fold, produces a new iterator.

fn flat_map<U, F>(self, f: F) -> FlatMap<Self, U, F>

where Self: Sized, U: IntoIterator, F: FnMut(Self::Item) -> U,

Creates an iterator that works like map, but flattens nested structure.

fn map_windows<F, R, const N: usize>(self, f: F) -> MapWindows<Self, F, N>

where Self: Sized, F: FnMut(&[Self::Item; N]) -> R,

🔬This is a nightly-only experimental API. (iter_map_windows)

Calls the given function f for each contiguous window of size N over self and returns an iterator over the outputs of f. Like slice::windows(), the windows during mapping overlap as well.

fn fuse(self) -> Fuse<Self>

where Self: Sized,

Creates an iterator which ends after the first None.

fn inspect<F>(self, f: F) -> Inspect<Self, F>

where Self: Sized, F: FnMut(&Self::Item),

Does something with each element of an iterator, passing the value on.

fn by_ref(&mut self) -> &mut Self

where Self: Sized,

Creates a “by reference” adapter for this instance of Iterator.

fn collect<B>(self) -> B

where B: FromIterator<Self::Item>, Self: Sized,

Transforms an iterator into a collection.

fn collect_into<E>(self, collection: &mut E) -> &mut E

where E: Extend<Self::Item>, Self: Sized,

🔬This is a nightly-only experimental API. (iter_collect_into)

Collects all the items from an iterator into a collection.

fn partition<B, F>(self, f: F) -> (B, B)

where Self: Sized, B: Default + Extend<Self::Item>, F: FnMut(&Self::Item) -> bool,

Consumes an iterator, creating two collections from it.

fn is_partitioned<P>(self, predicate: P) -> bool

where Self: Sized, P: FnMut(Self::Item) -> bool,

🔬This is a nightly-only experimental API. (iter_is_partitioned)

Checks if the elements of this iterator are partitioned according to the given predicate, such that all those that return true precede all those that return false.

fn try_fold<B, F, R>(&mut self, init: B, f: F) -> R

where Self: Sized, F: FnMut(B, Self::Item) -> R, R: Try<Output = B>,

An iterator method that applies a function as long as it returns successfully, producing a single, final value.

fn try_for_each<F, R>(&mut self, f: F) -> R

where Self: Sized, F: FnMut(Self::Item) -> R, R: Try<Output = ()>,

An iterator method that applies a fallible function to each item in the iterator, stopping at the first error and returning that error.

fn fold<B, F>(self, init: B, f: F) -> B

where Self: Sized, F: FnMut(B, Self::Item) -> B,

Folds every element into an accumulator by applying an operation, returning the final result.

fn reduce<F>(self, f: F) -> Option<Self::Item>

where Self: Sized, F: FnMut(Self::Item, Self::Item) -> Self::Item,

Reduces the elements to a single one, by repeatedly applying a reducing operation.

fn try_reduce<R>( &mut self, f: impl FnMut(Self::Item, Self::Item) -> R, ) -> <<R as Try>::Residual as Residual<Option<<R as Try>::Output>>>::TryType

where Self: Sized, R: Try<Output = Self::Item>, <R as Try>::Residual: Residual<Option<Self::Item>>,

🔬This is a nightly-only experimental API. (iterator_try_reduce)

Reduces the elements to a single one by repeatedly applying a reducing operation. If the closure returns a failure, the failure is propagated back to the caller immediately.

fn all<F>(&mut self, f: F) -> bool

where Self: Sized, F: FnMut(Self::Item) -> bool,

Tests if every element of the iterator matches a predicate.

fn any<F>(&mut self, f: F) -> bool

where Self: Sized, F: FnMut(Self::Item) -> bool,

Tests if any element of the iterator matches a predicate.

fn find<P>(&mut self, predicate: P) -> Option<Self::Item>

where Self: Sized, P: FnMut(&Self::Item) -> bool,

Searches for an element of an iterator that satisfies a predicate.

fn find_map<B, F>(&mut self, f: F) -> Option<B>

where Self: Sized, F: FnMut(Self::Item) -> Option<B>,

Applies function to the elements of iterator and returns the first non-none result.

fn try_find<R>( &mut self, f: impl FnMut(&Self::Item) -> R, ) -> <<R as Try>::Residual as Residual<Option<Self::Item>>>::TryType

where Self: Sized, R: Try<Output = bool>, <R as Try>::Residual: Residual<Option<Self::Item>>,

🔬This is a nightly-only experimental API. (try_find)

Applies function to the elements of iterator and returns the first true result or the first error.

fn position<P>(&mut self, predicate: P) -> Option<usize>

where Self: Sized, P: FnMut(Self::Item) -> bool,

Searches for an element in an iterator, returning its index.

fn max_by_key<B, F>(self, f: F) -> Option<Self::Item>

where B: Ord, Self: Sized, F: FnMut(&Self::Item) -> B,

Returns the element that gives the maximum value from the specified function.

fn max_by<F>(self, compare: F) -> Option<Self::Item>

where Self: Sized, F: FnMut(&Self::Item, &Self::Item) -> Ordering,

Returns the element that gives the maximum value with respect to the specified comparison function.

fn min_by_key<B, F>(self, f: F) -> Option<Self::Item>

where B: Ord, Self: Sized, F: FnMut(&Self::Item) -> B,

Returns the element that gives the minimum value from the specified function.

fn min_by<F>(self, compare: F) -> Option<Self::Item>

where Self: Sized, F: FnMut(&Self::Item, &Self::Item) -> Ordering,

Returns the element that gives the minimum value with respect to the specified comparison function.

fn unzip<A, B, FromA, FromB>(self) -> (FromA, FromB)

where FromA: Default + Extend<A>, FromB: Default + Extend<B>, Self: Sized + Iterator<Item = (A, B)>,

Converts an iterator of pairs into a pair of containers.

fn copied<'a, T>(self) -> Copied<Self>

where T: Copy + 'a, Self: Sized + Iterator<Item = &'a T>,

Creates an iterator which copies all of its elements.

fn cloned<'a, T>(self) -> Cloned<Self>

where T: Clone + 'a, Self: Sized + Iterator<Item = &'a T>,

Creates an iterator which clones all of its elements.

fn cycle(self) -> Cycle<Self>

where Self: Sized + Clone,

Repeats an iterator endlessly.

fn array_chunks<const N: usize>(self) -> ArrayChunks<Self, N>

where Self: Sized,

🔬This is a nightly-only experimental API. (iter_array_chunks)

Returns an iterator over N elements of the iterator at a time.

fn sum<S>(self) -> S

where Self: Sized, S: Sum<Self::Item>,

Sums the elements of an iterator.

fn product<P>(self) -> P

where Self: Sized, P: Product<Self::Item>,

Iterates over the entire iterator, multiplying all the elements

fn cmp_by<I, F>(self, other: I, cmp: F) -> Ordering

where Self: Sized, I: IntoIterator, F: FnMut(Self::Item, <I as IntoIterator>::Item) -> Ordering,

🔬This is a nightly-only experimental API. (iter_order_by)

Lexicographically compares the elements of this Iterator with those of another with respect to the specified comparison function.

fn partial_cmp<I>(self, other: I) -> Option<Ordering>

where I: IntoIterator, Self::Item: PartialOrd<<I as IntoIterator>::Item>, Self: Sized,

Lexicographically compares the PartialOrd elements of this Iterator with those of another. The comparison works like short-circuit evaluation, returning a result without comparing the remaining elements. As soon as an order can be determined, the evaluation stops and a result is returned.

fn partial_cmp_by<I, F>(self, other: I, partial_cmp: F) -> Option<Ordering>

where Self: Sized, I: IntoIterator, F: FnMut(Self::Item, <I as IntoIterator>::Item) -> Option<Ordering>,

🔬This is a nightly-only experimental API. (iter_order_by)

Lexicographically compares the elements of this Iterator with those of another with respect to the specified comparison function.

fn eq<I>(self, other: I) -> bool

where I: IntoIterator, Self::Item: PartialEq<<I as IntoIterator>::Item>, Self: Sized,

Determines if the elements of this Iterator are equal to those of another.

fn eq_by<I, F>(self, other: I, eq: F) -> bool

where Self: Sized, I: IntoIterator, F: FnMut(Self::Item, <I as IntoIterator>::Item) -> bool,

🔬This is a nightly-only experimental API. (iter_order_by)

Determines if the elements of this Iterator are equal to those of another with respect to the specified equality function.

fn ne<I>(self, other: I) -> bool

where I: IntoIterator, Self::Item: PartialEq<<I as IntoIterator>::Item>, Self: Sized,

Determines if the elements of this Iterator are not equal to those of another.

fn lt<I>(self, other: I) -> bool

where I: IntoIterator, Self::Item: PartialOrd<<I as IntoIterator>::Item>, Self: Sized,

Determines if the elements of this Iterator are lexicographically less than those of another.

fn le<I>(self, other: I) -> bool

where I: IntoIterator, Self::Item: PartialOrd<<I as IntoIterator>::Item>, Self: Sized,

Determines if the elements of this Iterator are lexicographically less or equal to those of another.

fn gt<I>(self, other: I) -> bool

where I: IntoIterator, Self::Item: PartialOrd<<I as IntoIterator>::Item>, Self: Sized,

Determines if the elements of this Iterator are lexicographically greater than those of another.

fn ge<I>(self, other: I) -> bool

where I: IntoIterator, Self::Item: PartialOrd<<I as IntoIterator>::Item>, Self: Sized,

Determines if the elements of this Iterator are lexicographically greater than or equal to those of another.

fn is_sorted_by<F>(self, compare: F) -> bool

where Self: Sized, F: FnMut(&Self::Item, &Self::Item) -> bool,

Checks if the elements of this iterator are sorted using the given comparator function.

fn is_sorted_by_key<F, K>(self, f: F) -> bool

where Self: Sized, F: FnMut(Self::Item) -> K, K: PartialOrd,

Checks if the elements of this iterator are sorted using the given key extraction function.