Enum gclient::ext::sp_runtime::Either
source · pub enum Either<L, R> {
Left(L),
Right(R),
}
Expand description
The enum Either
with variants Left
and Right
is a general purpose
sum type with two cases.
The Either
type is symmetric and treats its variants the same way, without
preference.
(For representing success or error, use the regular Result
enum instead.)
Variants§
Implementations§
source§impl<L, R> Either<L, R>
impl<L, R> Either<L, R>
sourcepub fn is_left(&self) -> bool
pub fn is_left(&self) -> bool
Return true if the value is the Left
variant.
use either::*;
let values = [Left(1), Right("the right value")];
assert_eq!(values[0].is_left(), true);
assert_eq!(values[1].is_left(), false);
sourcepub fn is_right(&self) -> bool
pub fn is_right(&self) -> bool
Return true if the value is the Right
variant.
use either::*;
let values = [Left(1), Right("the right value")];
assert_eq!(values[0].is_right(), false);
assert_eq!(values[1].is_right(), true);
sourcepub fn left(self) -> Option<L>
pub fn left(self) -> Option<L>
Convert the left side of Either<L, R>
to an Option<L>
.
use either::*;
let left: Either<_, ()> = Left("some value");
assert_eq!(left.left(), Some("some value"));
let right: Either<(), _> = Right(321);
assert_eq!(right.left(), None);
sourcepub fn right(self) -> Option<R>
pub fn right(self) -> Option<R>
Convert the right side of Either<L, R>
to an Option<R>
.
use either::*;
let left: Either<_, ()> = Left("some value");
assert_eq!(left.right(), None);
let right: Either<(), _> = Right(321);
assert_eq!(right.right(), Some(321));
sourcepub fn as_ref(&self) -> Either<&L, &R> ⓘ
pub fn as_ref(&self) -> Either<&L, &R> ⓘ
Convert &Either<L, R>
to Either<&L, &R>
.
use either::*;
let left: Either<_, ()> = Left("some value");
assert_eq!(left.as_ref(), Left(&"some value"));
let right: Either<(), _> = Right("some value");
assert_eq!(right.as_ref(), Right(&"some value"));
sourcepub fn as_mut(&mut self) -> Either<&mut L, &mut R> ⓘ
pub fn as_mut(&mut self) -> Either<&mut L, &mut R> ⓘ
Convert &mut Either<L, R>
to Either<&mut L, &mut R>
.
use either::*;
fn mutate_left(value: &mut Either<u32, u32>) {
if let Some(l) = value.as_mut().left() {
*l = 999;
}
}
let mut left = Left(123);
let mut right = Right(123);
mutate_left(&mut left);
mutate_left(&mut right);
assert_eq!(left, Left(999));
assert_eq!(right, Right(123));
sourcepub fn as_pin_ref(self: Pin<&Either<L, R>>) -> Either<Pin<&L>, Pin<&R>> ⓘ
pub fn as_pin_ref(self: Pin<&Either<L, R>>) -> Either<Pin<&L>, Pin<&R>> ⓘ
Convert Pin<&Either<L, R>>
to Either<Pin<&L>, Pin<&R>>
,
pinned projections of the inner variants.
sourcepub fn as_pin_mut(
self: Pin<&mut Either<L, R>>,
) -> Either<Pin<&mut L>, Pin<&mut R>> ⓘ
pub fn as_pin_mut( self: Pin<&mut Either<L, R>>, ) -> Either<Pin<&mut L>, Pin<&mut R>> ⓘ
Convert Pin<&mut Either<L, R>>
to Either<Pin<&mut L>, Pin<&mut R>>
,
pinned projections of the inner variants.
sourcepub fn flip(self) -> Either<R, L> ⓘ
pub fn flip(self) -> Either<R, L> ⓘ
Convert Either<L, R>
to Either<R, L>
.
use either::*;
let left: Either<_, ()> = Left(123);
assert_eq!(left.flip(), Right(123));
let right: Either<(), _> = Right("some value");
assert_eq!(right.flip(), Left("some value"));
sourcepub fn map_left<F, M>(self, f: F) -> Either<M, R> ⓘwhere
F: FnOnce(L) -> M,
pub fn map_left<F, M>(self, f: F) -> Either<M, R> ⓘwhere
F: FnOnce(L) -> M,
Apply the function f
on the value in the Left
variant if it is present rewrapping the
result in Left
.
use either::*;
let left: Either<_, u32> = Left(123);
assert_eq!(left.map_left(|x| x * 2), Left(246));
let right: Either<u32, _> = Right(123);
assert_eq!(right.map_left(|x| x * 2), Right(123));
sourcepub fn map_right<F, S>(self, f: F) -> Either<L, S> ⓘwhere
F: FnOnce(R) -> S,
pub fn map_right<F, S>(self, f: F) -> Either<L, S> ⓘwhere
F: FnOnce(R) -> S,
Apply the function f
on the value in the Right
variant if it is present rewrapping the
result in Right
.
use either::*;
let left: Either<_, u32> = Left(123);
assert_eq!(left.map_right(|x| x * 2), Left(123));
let right: Either<u32, _> = Right(123);
assert_eq!(right.map_right(|x| x * 2), Right(246));
sourcepub fn map_either<F, G, M, S>(self, f: F, g: G) -> Either<M, S> ⓘ
pub fn map_either<F, G, M, S>(self, f: F, g: G) -> Either<M, S> ⓘ
Apply the functions f
and g
to the Left
and Right
variants
respectively. This is equivalent to
bimap
in functional programming.
use either::*;
let f = |s: String| s.len();
let g = |u: u8| u.to_string();
let left: Either<String, u8> = Left("loopy".into());
assert_eq!(left.map_either(f, g), Left(5));
let right: Either<String, u8> = Right(42);
assert_eq!(right.map_either(f, g), Right("42".into()));
sourcepub fn map_either_with<Ctx, F, G, M, S>(
self,
ctx: Ctx,
f: F,
g: G,
) -> Either<M, S> ⓘ
pub fn map_either_with<Ctx, F, G, M, S>( self, ctx: Ctx, f: F, g: G, ) -> Either<M, S> ⓘ
Similar to map_either
, with an added context ctx
accessible to
both functions.
use either::*;
let mut sum = 0;
// Both closures want to update the same value, so pass it as context.
let mut f = |sum: &mut usize, s: String| { *sum += s.len(); s.to_uppercase() };
let mut g = |sum: &mut usize, u: usize| { *sum += u; u.to_string() };
let left: Either<String, usize> = Left("loopy".into());
assert_eq!(left.map_either_with(&mut sum, &mut f, &mut g), Left("LOOPY".into()));
let right: Either<String, usize> = Right(42);
assert_eq!(right.map_either_with(&mut sum, &mut f, &mut g), Right("42".into()));
assert_eq!(sum, 47);
sourcepub fn either<F, G, T>(self, f: F, g: G) -> T
pub fn either<F, G, T>(self, f: F, g: G) -> T
Apply one of two functions depending on contents, unifying their result. If the value is
Left(L)
then the first function f
is applied; if it is Right(R)
then the second
function g
is applied.
use either::*;
fn square(n: u32) -> i32 { (n * n) as i32 }
fn negate(n: i32) -> i32 { -n }
let left: Either<u32, i32> = Left(4);
assert_eq!(left.either(square, negate), 16);
let right: Either<u32, i32> = Right(-4);
assert_eq!(right.either(square, negate), 4);
sourcepub fn either_with<Ctx, F, G, T>(self, ctx: Ctx, f: F, g: G) -> T
pub fn either_with<Ctx, F, G, T>(self, ctx: Ctx, f: F, g: G) -> T
Like either
, but provide some context to whichever of the
functions ends up being called.
// In this example, the context is a mutable reference
use either::*;
let mut result = Vec::new();
let values = vec![Left(2), Right(2.7)];
for value in values {
value.either_with(&mut result,
|ctx, integer| ctx.push(integer),
|ctx, real| ctx.push(f64::round(real) as i32));
}
assert_eq!(result, vec![2, 3]);
sourcepub fn left_and_then<F, S>(self, f: F) -> Either<S, R> ⓘ
pub fn left_and_then<F, S>(self, f: F) -> Either<S, R> ⓘ
Apply the function f
on the value in the Left
variant if it is present.
use either::*;
let left: Either<_, u32> = Left(123);
assert_eq!(left.left_and_then::<_,()>(|x| Right(x * 2)), Right(246));
let right: Either<u32, _> = Right(123);
assert_eq!(right.left_and_then(|x| Right::<(), _>(x * 2)), Right(123));
sourcepub fn right_and_then<F, S>(self, f: F) -> Either<L, S> ⓘ
pub fn right_and_then<F, S>(self, f: F) -> Either<L, S> ⓘ
Apply the function f
on the value in the Right
variant if it is present.
use either::*;
let left: Either<_, u32> = Left(123);
assert_eq!(left.right_and_then(|x| Right(x * 2)), Left(123));
let right: Either<u32, _> = Right(123);
assert_eq!(right.right_and_then(|x| Right(x * 2)), Right(246));
sourcepub fn into_iter(
self,
) -> Either<<L as IntoIterator>::IntoIter, <R as IntoIterator>::IntoIter> ⓘ
pub fn into_iter( self, ) -> Either<<L as IntoIterator>::IntoIter, <R as IntoIterator>::IntoIter> ⓘ
Convert the inner value to an iterator.
This requires the Left
and Right
iterators to have the same item type.
See factor_into_iter
to iterate different types.
use either::*;
let left: Either<_, Vec<u32>> = Left(vec![1, 2, 3, 4, 5]);
let mut right: Either<Vec<u32>, _> = Right(vec![]);
right.extend(left.into_iter());
assert_eq!(right, Right(vec![1, 2, 3, 4, 5]));
sourcepub fn iter(
&self,
) -> Either<<&L as IntoIterator>::IntoIter, <&R as IntoIterator>::IntoIter> ⓘwhere
&'a L: for<'a> IntoIterator,
&'a R: for<'a> IntoIterator<Item = <&'a L as IntoIterator>::Item>,
pub fn iter(
&self,
) -> Either<<&L as IntoIterator>::IntoIter, <&R as IntoIterator>::IntoIter> ⓘwhere
&'a L: for<'a> IntoIterator,
&'a R: for<'a> IntoIterator<Item = <&'a L as IntoIterator>::Item>,
Borrow the inner value as an iterator.
This requires the Left
and Right
iterators to have the same item type.
See factor_iter
to iterate different types.
use either::*;
let left: Either<_, &[u32]> = Left(vec![2, 3]);
let mut right: Either<Vec<u32>, _> = Right(&[4, 5][..]);
let mut all = vec![1];
all.extend(left.iter());
all.extend(right.iter());
assert_eq!(all, vec![1, 2, 3, 4, 5]);
sourcepub fn iter_mut(
&mut self,
) -> Either<<&mut L as IntoIterator>::IntoIter, <&mut R as IntoIterator>::IntoIter> ⓘwhere
&'a mut L: for<'a> IntoIterator,
&'a mut R: for<'a> IntoIterator<Item = <&'a mut L as IntoIterator>::Item>,
pub fn iter_mut(
&mut self,
) -> Either<<&mut L as IntoIterator>::IntoIter, <&mut R as IntoIterator>::IntoIter> ⓘwhere
&'a mut L: for<'a> IntoIterator,
&'a mut R: for<'a> IntoIterator<Item = <&'a mut L as IntoIterator>::Item>,
Mutably borrow the inner value as an iterator.
This requires the Left
and Right
iterators to have the same item type.
See factor_iter_mut
to iterate different types.
use either::*;
let mut left: Either<_, &mut [u32]> = Left(vec![2, 3]);
for l in left.iter_mut() {
*l *= *l
}
assert_eq!(left, Left(vec![4, 9]));
let mut inner = [4, 5];
let mut right: Either<Vec<u32>, _> = Right(&mut inner[..]);
for r in right.iter_mut() {
*r *= *r
}
assert_eq!(inner, [16, 25]);
sourcepub fn factor_into_iter(
self,
) -> IterEither<<L as IntoIterator>::IntoIter, <R as IntoIterator>::IntoIter> ⓘwhere
L: IntoIterator,
R: IntoIterator,
pub fn factor_into_iter(
self,
) -> IterEither<<L as IntoIterator>::IntoIter, <R as IntoIterator>::IntoIter> ⓘwhere
L: IntoIterator,
R: IntoIterator,
Converts an Either
of Iterator
s to be an Iterator
of Either
s
Unlike into_iter
, this does not require the
Left
and Right
iterators to have the same item type.
use either::*;
let left: Either<_, Vec<u8>> = Left(&["hello"]);
assert_eq!(left.factor_into_iter().next(), Some(Left(&"hello")));
let right: Either<&[&str], _> = Right(vec![0, 1]);
assert_eq!(right.factor_into_iter().collect::<Vec<_>>(), vec![Right(0), Right(1)]);
sourcepub fn factor_iter(
&self,
) -> IterEither<<&L as IntoIterator>::IntoIter, <&R as IntoIterator>::IntoIter> ⓘ
pub fn factor_iter( &self, ) -> IterEither<<&L as IntoIterator>::IntoIter, <&R as IntoIterator>::IntoIter> ⓘ
Borrows an Either
of Iterator
s to be an Iterator
of Either
s
Unlike iter
, this does not require the
Left
and Right
iterators to have the same item type.
use either::*;
let left: Either<_, Vec<u8>> = Left(["hello"]);
assert_eq!(left.factor_iter().next(), Some(Left(&"hello")));
let right: Either<[&str; 2], _> = Right(vec![0, 1]);
assert_eq!(right.factor_iter().collect::<Vec<_>>(), vec![Right(&0), Right(&1)]);
sourcepub fn factor_iter_mut(
&mut self,
) -> IterEither<<&mut L as IntoIterator>::IntoIter, <&mut R as IntoIterator>::IntoIter> ⓘ
pub fn factor_iter_mut( &mut self, ) -> IterEither<<&mut L as IntoIterator>::IntoIter, <&mut R as IntoIterator>::IntoIter> ⓘ
Mutably borrows an Either
of Iterator
s to be an Iterator
of Either
s
Unlike iter_mut
, this does not require the
Left
and Right
iterators to have the same item type.
use either::*;
let mut left: Either<_, Vec<u8>> = Left(["hello"]);
left.factor_iter_mut().for_each(|x| *x.unwrap_left() = "goodbye");
assert_eq!(left, Left(["goodbye"]));
let mut right: Either<[&str; 2], _> = Right(vec![0, 1, 2]);
right.factor_iter_mut().for_each(|x| if let Right(r) = x { *r = -*r; });
assert_eq!(right, Right(vec![0, -1, -2]));
sourcepub fn left_or(self, other: L) -> L
pub fn left_or(self, other: L) -> L
Return left value or given value
Arguments passed to left_or
are eagerly evaluated; if you are passing
the result of a function call, it is recommended to use
left_or_else
, which is lazily evaluated.
§Examples
let left: Either<&str, &str> = Left("left");
assert_eq!(left.left_or("foo"), "left");
let right: Either<&str, &str> = Right("right");
assert_eq!(right.left_or("left"), "left");
sourcepub fn left_or_default(self) -> Lwhere
L: Default,
pub fn left_or_default(self) -> Lwhere
L: Default,
Return left or a default
§Examples
let left: Either<String, u32> = Left("left".to_string());
assert_eq!(left.left_or_default(), "left");
let right: Either<String, u32> = Right(42);
assert_eq!(right.left_or_default(), String::default());
sourcepub fn left_or_else<F>(self, f: F) -> Lwhere
F: FnOnce(R) -> L,
pub fn left_or_else<F>(self, f: F) -> Lwhere
F: FnOnce(R) -> L,
Returns left value or computes it from a closure
§Examples
let left: Either<String, u32> = Left("3".to_string());
assert_eq!(left.left_or_else(|_| unreachable!()), "3");
let right: Either<String, u32> = Right(3);
assert_eq!(right.left_or_else(|x| x.to_string()), "3");
sourcepub fn right_or(self, other: R) -> R
pub fn right_or(self, other: R) -> R
Return right value or given value
Arguments passed to right_or
are eagerly evaluated; if you are passing
the result of a function call, it is recommended to use
right_or_else
, which is lazily evaluated.
§Examples
let right: Either<&str, &str> = Right("right");
assert_eq!(right.right_or("foo"), "right");
let left: Either<&str, &str> = Left("left");
assert_eq!(left.right_or("right"), "right");
sourcepub fn right_or_default(self) -> Rwhere
R: Default,
pub fn right_or_default(self) -> Rwhere
R: Default,
Return right or a default
§Examples
let left: Either<String, u32> = Left("left".to_string());
assert_eq!(left.right_or_default(), u32::default());
let right: Either<String, u32> = Right(42);
assert_eq!(right.right_or_default(), 42);
sourcepub fn right_or_else<F>(self, f: F) -> Rwhere
F: FnOnce(L) -> R,
pub fn right_or_else<F>(self, f: F) -> Rwhere
F: FnOnce(L) -> R,
Returns right value or computes it from a closure
§Examples
let left: Either<String, u32> = Left("3".to_string());
assert_eq!(left.right_or_else(|x| x.parse().unwrap()), 3);
let right: Either<String, u32> = Right(3);
assert_eq!(right.right_or_else(|_| unreachable!()), 3);
sourcepub fn unwrap_left(self) -> Lwhere
R: Debug,
pub fn unwrap_left(self) -> Lwhere
R: Debug,
sourcepub fn unwrap_right(self) -> Rwhere
L: Debug,
pub fn unwrap_right(self) -> Rwhere
L: Debug,
sourcepub fn expect_left(self, msg: &str) -> Lwhere
R: Debug,
pub fn expect_left(self, msg: &str) -> Lwhere
R: Debug,
sourcepub fn expect_right(self, msg: &str) -> Rwhere
L: Debug,
pub fn expect_right(self, msg: &str) -> Rwhere
L: Debug,
sourcepub fn either_into<T>(self) -> T
pub fn either_into<T>(self) -> T
Convert the contained value into T
§Examples
// Both u16 and u32 can be converted to u64.
let left: Either<u16, u32> = Left(3u16);
assert_eq!(left.either_into::<u64>(), 3u64);
let right: Either<u16, u32> = Right(7u32);
assert_eq!(right.either_into::<u64>(), 7u64);
source§impl<L, R> Either<Option<L>, Option<R>>
impl<L, R> Either<Option<L>, Option<R>>
sourcepub fn factor_none(self) -> Option<Either<L, R>>
pub fn factor_none(self) -> Option<Either<L, R>>
Factors out None
from an Either
of Option
.
use either::*;
let left: Either<_, Option<String>> = Left(Some(vec![0]));
assert_eq!(left.factor_none(), Some(Left(vec![0])));
let right: Either<Option<Vec<u8>>, _> = Right(Some(String::new()));
assert_eq!(right.factor_none(), Some(Right(String::new())));
source§impl<L, R, E> Either<Result<L, E>, Result<R, E>>
impl<L, R, E> Either<Result<L, E>, Result<R, E>>
sourcepub fn factor_err(self) -> Result<Either<L, R>, E>
pub fn factor_err(self) -> Result<Either<L, R>, E>
Factors out a homogenous type from an Either
of Result
.
Here, the homogeneous type is the Err
type of the Result
.
use either::*;
let left: Either<_, Result<String, u32>> = Left(Ok(vec![0]));
assert_eq!(left.factor_err(), Ok(Left(vec![0])));
let right: Either<Result<Vec<u8>, u32>, _> = Right(Ok(String::new()));
assert_eq!(right.factor_err(), Ok(Right(String::new())));
source§impl<T, L, R> Either<Result<T, L>, Result<T, R>>
impl<T, L, R> Either<Result<T, L>, Result<T, R>>
sourcepub fn factor_ok(self) -> Result<T, Either<L, R>>
pub fn factor_ok(self) -> Result<T, Either<L, R>>
Factors out a homogenous type from an Either
of Result
.
Here, the homogeneous type is the Ok
type of the Result
.
use either::*;
let left: Either<_, Result<u32, String>> = Left(Err(vec![0]));
assert_eq!(left.factor_ok(), Err(Left(vec![0])));
let right: Either<Result<u32, Vec<u8>>, _> = Right(Err(String::new()));
assert_eq!(right.factor_ok(), Err(Right(String::new())));
source§impl<T, L, R> Either<(T, L), (T, R)>
impl<T, L, R> Either<(T, L), (T, R)>
sourcepub fn factor_first(self) -> (T, Either<L, R>)
pub fn factor_first(self) -> (T, Either<L, R>)
Factor out a homogeneous type from an either of pairs.
Here, the homogeneous type is the first element of the pairs.
use either::*;
let left: Either<_, (u32, String)> = Left((123, vec![0]));
assert_eq!(left.factor_first().0, 123);
let right: Either<(u32, Vec<u8>), _> = Right((123, String::new()));
assert_eq!(right.factor_first().0, 123);
source§impl<T, L, R> Either<(L, T), (R, T)>
impl<T, L, R> Either<(L, T), (R, T)>
sourcepub fn factor_second(self) -> (Either<L, R>, T)
pub fn factor_second(self) -> (Either<L, R>, T)
Factor out a homogeneous type from an either of pairs.
Here, the homogeneous type is the second element of the pairs.
use either::*;
let left: Either<_, (String, u32)> = Left((vec![0], 123));
assert_eq!(left.factor_second().1, 123);
let right: Either<(Vec<u8>, u32), _> = Right((String::new(), 123));
assert_eq!(right.factor_second().1, 123);
source§impl<T> Either<T, T>
impl<T> Either<T, T>
sourcepub fn into_inner(self) -> T
pub fn into_inner(self) -> T
Extract the value of an either over two equivalent types.
use either::*;
let left: Either<_, u32> = Left(123);
assert_eq!(left.into_inner(), 123);
let right: Either<u32, _> = Right(123);
assert_eq!(right.into_inner(), 123);
source§impl<L, R> Either<&L, &R>
impl<L, R> Either<&L, &R>
Trait Implementations§
source§impl<L, R, Target> AsMut<Target> for Either<L, R>
impl<L, R, Target> AsMut<Target> for Either<L, R>
source§fn as_mut(&mut self) -> &mut Target
fn as_mut(&mut self) -> &mut Target
source§impl<L, R> BufRead for Either<L, R>
impl<L, R> BufRead for Either<L, R>
Requires crate feature "use_std"
source§fn fill_buf(&mut self) -> Result<&[u8], Error>
fn fill_buf(&mut self) -> Result<&[u8], Error>
source§fn consume(&mut self, amt: usize)
fn consume(&mut self, amt: usize)
amt
bytes have been consumed from the buffer,
so they should no longer be returned in calls to read
. Read moresource§fn read_line(&mut self, buf: &mut String) -> Result<usize, Error>
fn read_line(&mut self, buf: &mut String) -> Result<usize, Error>
0xA
byte) is reached, and append
them to the provided String
buffer. Read moresource§fn has_data_left(&mut self) -> Result<bool, Error>
fn has_data_left(&mut self) -> Result<bool, Error>
buf_read_has_data_left
)Read
has any data left to be read. Read moresource§fn skip_until(&mut self, byte: u8) -> Result<usize, Error>
fn skip_until(&mut self, byte: u8) -> Result<usize, Error>
bufread_skip_until
)byte
or EOF is reached. Read moresource§impl<L, R> DoubleEndedIterator for Either<L, R>
impl<L, R> DoubleEndedIterator for Either<L, R>
source§fn next_back(&mut self) -> Option<<Either<L, R> as Iterator>::Item>
fn next_back(&mut self) -> Option<<Either<L, R> as Iterator>::Item>
source§fn nth_back(&mut self, n: usize) -> Option<<Either<L, R> as Iterator>::Item>
fn nth_back(&mut self, n: usize) -> Option<<Either<L, R> as Iterator>::Item>
n
th element from the end of the iterator. Read moresource§fn rfold<Acc, G>(self, init: Acc, f: G) -> Acc
fn rfold<Acc, G>(self, init: Acc, f: G) -> Acc
source§fn rfind<P>(&mut self, predicate: P) -> Option<<Either<L, R> as Iterator>::Item>
fn rfind<P>(&mut self, predicate: P) -> Option<<Either<L, R> as Iterator>::Item>
source§impl<L, R> Error for Either<L, R>
impl<L, R> Error for Either<L, R>
Either
implements Error
if both L
and R
implement it.
Requires crate feature "use_std"
source§fn source(&self) -> Option<&(dyn Error + 'static)>
fn source(&self) -> Option<&(dyn Error + 'static)>
source§fn description(&self) -> &str
fn description(&self) -> &str
source§impl<L, R> ExactSizeIterator for Either<L, R>
impl<L, R> ExactSizeIterator for Either<L, R>
source§impl<L, R, A> Extend<A> for Either<L, R>
impl<L, R, A> Extend<A> for Either<L, R>
source§fn extend<T>(&mut self, iter: T)where
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iter_map_windows
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,
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)1.6.0 · source§fn max_by_key<B, F>(self, f: F) -> Option<Self::Item>
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1.0.0 · source§fn unzip<A, B, FromA, FromB>(self) -> (FromA, FromB)
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)N
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fn product<P>(self) -> P
source§fn cmp_by<I, F>(self, other: I, cmp: F) -> Ordering
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PartialOrd
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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>,
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)1.5.0 · source§fn lt<I>(self, other: I) -> bool
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impl<L, R> Ord for Either<L, R>
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fn max(self, other: Self) -> Selfwhere
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Read
. Read moresource§impl<L, R> Seek for Either<L, R>
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fn tree_fold1<F>(self, f: F) -> Option<Self::Item>
source§fn fold_while<B, F>(&mut self, init: B, f: F) -> FoldWhile<B>
fn fold_while<B, F>(&mut self, init: B, f: F) -> FoldWhile<B>
source§fn sum1<S>(self) -> Option<S>
fn sum1<S>(self) -> Option<S>
source§fn product1<P>(self) -> Option<P>
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source§fn sorted_unstable(self) -> IntoIter<Self::Item> ⓘ
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source§fn sorted_unstable_by<F>(self, cmp: F) -> IntoIter<Self::Item> ⓘ
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source§fn sorted_unstable_by_key<K, F>(self, f: F) -> IntoIter<Self::Item> ⓘ
fn sorted_unstable_by_key<K, F>(self, f: F) -> IntoIter<Self::Item> ⓘ
source§fn sorted(self) -> IntoIter<Self::Item> ⓘ
fn sorted(self) -> IntoIter<Self::Item> ⓘ
source§fn sorted_by<F>(self, cmp: F) -> IntoIter<Self::Item> ⓘ
fn sorted_by<F>(self, cmp: F) -> IntoIter<Self::Item> ⓘ
source§fn sorted_by_key<K, F>(self, f: F) -> IntoIter<Self::Item> ⓘ
fn sorted_by_key<K, F>(self, f: F) -> IntoIter<Self::Item> ⓘ
source§fn sorted_by_cached_key<K, F>(self, f: F) -> IntoIter<Self::Item> ⓘ
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source§fn k_smallest(self, k: usize) -> IntoIter<Self::Item> ⓘ
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source§fn partition_map<A, B, F, L, R>(self, predicate: F) -> (A, B)
fn partition_map<A, B, F, L, R>(self, predicate: F) -> (A, B)
Iterator::partition
, each partition may
have a distinct type. Read moresource§fn partition_result<A, B, T, E>(self) -> (A, B)
fn partition_result<A, B, T, E>(self) -> (A, B)
Result
s into one list of all the Ok
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fn into_group_map<K, V>(self) -> HashMap<K, Vec<V>>
HashMap
of keys mapped to Vec
s of values. Keys and values
are taken from (Key, Value)
tuple pairs yielded by the input iterator. Read moresource§fn into_group_map_by<K, V, F>(self, f: F) -> HashMap<K, Vec<V>>
fn into_group_map_by<K, V, F>(self, f: F) -> HashMap<K, Vec<V>>
Iterator
on a HashMap
. Keys mapped to Vec
s of values. The key is specified
in the closure. Read moresource§fn into_grouping_map<K, V>(self) -> GroupingMap<Self>
fn into_grouping_map<K, V>(self) -> GroupingMap<Self>
GroupingMap
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group-and-fold operations it allows to perform. Read moresource§fn into_grouping_map_by<K, V, F>(
self,
key_mapper: F,
) -> GroupingMap<MapForGrouping<Self, F>>
fn into_grouping_map_by<K, V, F>( self, key_mapper: F, ) -> GroupingMap<MapForGrouping<Self, F>>
GroupingMap
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fn min_set_by<F>(self, compare: F) -> Vec<Self::Item>
source§fn min_set_by_key<K, F>(self, key: F) -> Vec<Self::Item>
fn min_set_by_key<K, F>(self, key: F) -> Vec<Self::Item>
source§fn max_set_by<F>(self, compare: F) -> Vec<Self::Item>
fn max_set_by<F>(self, compare: F) -> Vec<Self::Item>
source§fn max_set_by_key<K, F>(self, key: F) -> Vec<Self::Item>
fn max_set_by_key<K, F>(self, key: F) -> Vec<Self::Item>
source§fn minmax(self) -> MinMaxResult<Self::Item>
fn minmax(self) -> MinMaxResult<Self::Item>
source§fn minmax_by_key<K, F>(self, key: F) -> MinMaxResult<Self::Item>
fn minmax_by_key<K, F>(self, key: F) -> MinMaxResult<Self::Item>
source§fn minmax_by<F>(self, compare: F) -> MinMaxResult<Self::Item>
fn minmax_by<F>(self, compare: F) -> MinMaxResult<Self::Item>
source§fn position_max(self) -> Option<usize>
fn position_max(self) -> Option<usize>
source§fn position_max_by_key<K, F>(self, key: F) -> Option<usize>
fn position_max_by_key<K, F>(self, key: F) -> Option<usize>
source§fn position_max_by<F>(self, compare: F) -> Option<usize>
fn position_max_by<F>(self, compare: F) -> Option<usize>
source§fn position_min(self) -> Option<usize>
fn position_min(self) -> Option<usize>
source§fn position_min_by_key<K, F>(self, key: F) -> Option<usize>
fn position_min_by_key<K, F>(self, key: F) -> Option<usize>
source§fn position_min_by<F>(self, compare: F) -> Option<usize>
fn position_min_by<F>(self, compare: F) -> Option<usize>
source§fn position_minmax(self) -> MinMaxResult<usize>
fn position_minmax(self) -> MinMaxResult<usize>
source§fn position_minmax_by_key<K, F>(self, key: F) -> MinMaxResult<usize>
fn position_minmax_by_key<K, F>(self, key: F) -> MinMaxResult<usize>
source§fn position_minmax_by<F>(self, compare: F) -> MinMaxResult<usize>
fn position_minmax_by<F>(self, compare: F) -> MinMaxResult<usize>
source§fn exactly_one(self) -> Result<Self::Item, ExactlyOneError<Self>>where
Self: Sized,
fn exactly_one(self) -> Result<Self::Item, ExactlyOneError<Self>>where
Self: Sized,
source§fn at_most_one(self) -> Result<Option<Self::Item>, ExactlyOneError<Self>>where
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Self: Sized,
source§fn multipeek(self) -> MultiPeek<Self> ⓘwhere
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.next()
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fn counts(self) -> HashMap<Self::Item, usize>
HashMap
which
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fn counts_by<K, F>(self, f: F) -> HashMap<K, usize>
HashMap
which
contains each item that appears in the iterator and the number
of times it appears,
determining identity using a keying function. Read moresource§fn multiunzip<FromI>(self) -> FromIwhere
Self: Sized + MultiUnzip<FromI>,
fn multiunzip<FromI>(self) -> FromIwhere
Self: Sized + MultiUnzip<FromI>,
source§impl<IT> MultiUnzip<()> for IT
impl<IT> MultiUnzip<()> for IT
source§fn multiunzip(self)
fn multiunzip(self)
source§impl<IT, A, FromA> MultiUnzip<(FromA,)> for IT
impl<IT, A, FromA> MultiUnzip<(FromA,)> for IT
source§fn multiunzip(self) -> (FromA,)
fn multiunzip(self) -> (FromA,)
source§impl<IT, A, FromA, B, FromB> MultiUnzip<(FromA, FromB)> for IT
impl<IT, A, FromA, B, FromB> MultiUnzip<(FromA, FromB)> for IT
source§fn multiunzip(self) -> (FromA, FromB)
fn multiunzip(self) -> (FromA, FromB)
source§impl<IT, A, FromA, B, FromB, C, FromC> MultiUnzip<(FromA, FromB, FromC)> for IT
impl<IT, A, FromA, B, FromB, C, FromC> MultiUnzip<(FromA, FromB, FromC)> for IT
source§fn multiunzip(self) -> (FromA, FromB, FromC)
fn multiunzip(self) -> (FromA, FromB, FromC)
source§impl<IT, A, FromA, B, FromB, C, FromC, D, FromD> MultiUnzip<(FromA, FromB, FromC, FromD)> for IT
impl<IT, A, FromA, B, FromB, C, FromC, D, FromD> MultiUnzip<(FromA, FromB, FromC, FromD)> for IT
source§fn multiunzip(self) -> (FromA, FromB, FromC, FromD)
fn multiunzip(self) -> (FromA, FromB, FromC, FromD)
source§impl<IT, A, FromA, B, FromB, C, FromC, D, FromD, E, FromE> MultiUnzip<(FromA, FromB, FromC, FromD, FromE)> for IT
impl<IT, A, FromA, B, FromB, C, FromC, D, FromD, E, FromE> MultiUnzip<(FromA, FromB, FromC, FromD, FromE)> for IT
source§fn multiunzip(self) -> (FromA, FromB, FromC, FromD, FromE)
fn multiunzip(self) -> (FromA, FromB, FromC, FromD, FromE)
source§impl<IT, A, FromA, B, FromB, C, FromC, D, FromD, E, FromE, F, FromF> MultiUnzip<(FromA, FromB, FromC, FromD, FromE, FromF)> for IT
impl<IT, A, FromA, B, FromB, C, FromC, D, FromD, E, FromE, F, FromF> MultiUnzip<(FromA, FromB, FromC, FromD, FromE, FromF)> for IT
source§fn multiunzip(self) -> (FromA, FromB, FromC, FromD, FromE, FromF)
fn multiunzip(self) -> (FromA, FromB, FromC, FromD, FromE, FromF)
source§impl<IT, A, FromA, B, FromB, C, FromC, D, FromD, E, FromE, F, FromF, G, FromG> MultiUnzip<(FromA, FromB, FromC, FromD, FromE, FromF, FromG)> for IT
impl<IT, A, FromA, B, FromB, C, FromC, D, FromD, E, FromE, F, FromF, G, FromG> MultiUnzip<(FromA, FromB, FromC, FromD, FromE, FromF, FromG)> for IT
source§fn multiunzip(self) -> (FromA, FromB, FromC, FromD, FromE, FromF, FromG)
fn multiunzip(self) -> (FromA, FromB, FromC, FromD, FromE, FromF, FromG)
source§impl<IT, A, FromA, B, FromB, C, FromC, D, FromD, E, FromE, F, FromF, G, FromG, H, FromH> MultiUnzip<(FromA, FromB, FromC, FromD, FromE, FromF, FromG, FromH)> for IT
impl<IT, A, FromA, B, FromB, C, FromC, D, FromD, E, FromE, F, FromF, G, FromG, H, FromH> MultiUnzip<(FromA, FromB, FromC, FromD, FromE, FromF, FromG, FromH)> for IT
source§fn multiunzip(self) -> (FromA, FromB, FromC, FromD, FromE, FromF, FromG, FromH)
fn multiunzip(self) -> (FromA, FromB, FromC, FromD, FromE, FromF, FromG, FromH)
source§impl<IT, A, FromA, B, FromB, C, FromC, D, FromD, E, FromE, F, FromF, G, FromG, H, FromH, I, FromI> MultiUnzip<(FromA, FromB, FromC, FromD, FromE, FromF, FromG, FromH, FromI)> for ITwhere
IT: Iterator<Item = (A, B, C, D, E, F, G, H, I)>,
FromA: Default + Extend<A>,
FromB: Default + Extend<B>,
FromC: Default + Extend<C>,
FromD: Default + Extend<D>,
FromE: Default + Extend<E>,
FromF: Default + Extend<F>,
FromG: Default + Extend<G>,
FromH: Default + Extend<H>,
FromI: Default + Extend<I>,
impl<IT, A, FromA, B, FromB, C, FromC, D, FromD, E, FromE, F, FromF, G, FromG, H, FromH, I, FromI> MultiUnzip<(FromA, FromB, FromC, FromD, FromE, FromF, FromG, FromH, FromI)> for ITwhere
IT: Iterator<Item = (A, B, C, D, E, F, G, H, I)>,
FromA: Default + Extend<A>,
FromB: Default + Extend<B>,
FromC: Default + Extend<C>,
FromD: Default + Extend<D>,
FromE: Default + Extend<E>,
FromF: Default + Extend<F>,
FromG: Default + Extend<G>,
FromH: Default + Extend<H>,
FromI: Default + Extend<I>,
source§fn multiunzip(
self,
) -> (FromA, FromB, FromC, FromD, FromE, FromF, FromG, FromH, FromI)
fn multiunzip( self, ) -> (FromA, FromB, FromC, FromD, FromE, FromF, FromG, FromH, FromI)
source§impl<IT, A, FromA, B, FromB, C, FromC, D, FromD, E, FromE, F, FromF, G, FromG, H, FromH, I, FromI, J, FromJ> MultiUnzip<(FromA, FromB, FromC, FromD, FromE, FromF, FromG, FromH, FromI, FromJ)> for ITwhere
IT: Iterator<Item = (A, B, C, D, E, F, G, H, I, J)>,
FromA: Default + Extend<A>,
FromB: Default + Extend<B>,
FromC: Default + Extend<C>,
FromD: Default + Extend<D>,
FromE: Default + Extend<E>,
FromF: Default + Extend<F>,
FromG: Default + Extend<G>,
FromH: Default + Extend<H>,
FromI: Default + Extend<I>,
FromJ: Default + Extend<J>,
impl<IT, A, FromA, B, FromB, C, FromC, D, FromD, E, FromE, F, FromF, G, FromG, H, FromH, I, FromI, J, FromJ> MultiUnzip<(FromA, FromB, FromC, FromD, FromE, FromF, FromG, FromH, FromI, FromJ)> for ITwhere
IT: Iterator<Item = (A, B, C, D, E, F, G, H, I, J)>,
FromA: Default + Extend<A>,
FromB: Default + Extend<B>,
FromC: Default + Extend<C>,
FromD: Default + Extend<D>,
FromE: Default + Extend<E>,
FromF: Default + Extend<F>,
FromG: Default + Extend<G>,
FromH: Default + Extend<H>,
FromI: Default + Extend<I>,
FromJ: Default + Extend<J>,
source§fn multiunzip(
self,
) -> (FromA, FromB, FromC, FromD, FromE, FromF, FromG, FromH, FromI, FromJ)
fn multiunzip( self, ) -> (FromA, FromB, FromC, FromD, FromE, FromF, FromG, FromH, FromI, FromJ)
source§impl<IT, A, FromA, B, FromB, C, FromC, D, FromD, E, FromE, F, FromF, G, FromG, H, FromH, I, FromI, J, FromJ, K, FromK> MultiUnzip<(FromA, FromB, FromC, FromD, FromE, FromF, FromG, FromH, FromI, FromJ, FromK)> for ITwhere
IT: Iterator<Item = (A, B, C, D, E, F, G, H, I, J, K)>,
FromA: Default + Extend<A>,
FromB: Default + Extend<B>,
FromC: Default + Extend<C>,
FromD: Default + Extend<D>,
FromE: Default + Extend<E>,
FromF: Default + Extend<F>,
FromG: Default + Extend<G>,
FromH: Default + Extend<H>,
FromI: Default + Extend<I>,
FromJ: Default + Extend<J>,
FromK: Default + Extend<K>,
impl<IT, A, FromA, B, FromB, C, FromC, D, FromD, E, FromE, F, FromF, G, FromG, H, FromH, I, FromI, J, FromJ, K, FromK> MultiUnzip<(FromA, FromB, FromC, FromD, FromE, FromF, FromG, FromH, FromI, FromJ, FromK)> for ITwhere
IT: Iterator<Item = (A, B, C, D, E, F, G, H, I, J, K)>,
FromA: Default + Extend<A>,
FromB: Default + Extend<B>,
FromC: Default + Extend<C>,
FromD: Default + Extend<D>,
FromE: Default + Extend<E>,
FromF: Default + Extend<F>,
FromG: Default + Extend<G>,
FromH: Default + Extend<H>,
FromI: Default + Extend<I>,
FromJ: Default + Extend<J>,
FromK: Default + Extend<K>,
source§fn multiunzip(
self,
) -> (FromA, FromB, FromC, FromD, FromE, FromF, FromG, FromH, FromI, FromJ, FromK)
fn multiunzip( self, ) -> (FromA, FromB, FromC, FromD, FromE, FromF, FromG, FromH, FromI, FromJ, FromK)
source§impl<IT, A, FromA, B, FromB, C, FromC, D, FromD, E, FromE, F, FromF, G, FromG, H, FromH, I, FromI, J, FromJ, K, FromK, L, FromL> MultiUnzip<(FromA, FromB, FromC, FromD, FromE, FromF, FromG, FromH, FromI, FromJ, FromK, FromL)> for ITwhere
IT: Iterator<Item = (A, B, C, D, E, F, G, H, I, J, K, L)>,
FromA: Default + Extend<A>,
FromB: Default + Extend<B>,
FromC: Default + Extend<C>,
FromD: Default + Extend<D>,
FromE: Default + Extend<E>,
FromF: Default + Extend<F>,
FromG: Default + Extend<G>,
FromH: Default + Extend<H>,
FromI: Default + Extend<I>,
FromJ: Default + Extend<J>,
FromK: Default + Extend<K>,
FromL: Default + Extend<L>,
impl<IT, A, FromA, B, FromB, C, FromC, D, FromD, E, FromE, F, FromF, G, FromG, H, FromH, I, FromI, J, FromJ, K, FromK, L, FromL> MultiUnzip<(FromA, FromB, FromC, FromD, FromE, FromF, FromG, FromH, FromI, FromJ, FromK, FromL)> for ITwhere
IT: Iterator<Item = (A, B, C, D, E, F, G, H, I, J, K, L)>,
FromA: Default + Extend<A>,
FromB: Default + Extend<B>,
FromC: Default + Extend<C>,
FromD: Default + Extend<D>,
FromE: Default + Extend<E>,
FromF: Default + Extend<F>,
FromG: Default + Extend<G>,
FromH: Default + Extend<H>,
FromI: Default + Extend<I>,
FromJ: Default + Extend<J>,
FromK: Default + Extend<K>,
FromL: Default + Extend<L>,
source§fn multiunzip(
self,
) -> (FromA, FromB, FromC, FromD, FromE, FromF, FromG, FromH, FromI, FromJ, FromK, FromL)
fn multiunzip( self, ) -> (FromA, FromB, FromC, FromD, FromE, FromF, FromG, FromH, FromI, FromJ, FromK, FromL)
source§impl<S> ParseFormatted for S
impl<S> ParseFormatted for S
source§fn parse_formatted<F, N>(&self, format: &F) -> Result<N, Error>where
F: Format,
N: FromFormattedStr,
fn parse_formatted<F, N>(&self, format: &F) -> Result<N, Error>where
F: Format,
N: FromFormattedStr,
self
(typically a formatted string) into a number (see Examples above).§impl<T> Pipe for Twhere
T: ?Sized,
impl<T> Pipe for Twhere
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§fn pipe<R>(self, func: impl FnOnce(Self) -> R) -> Rwhere
Self: Sized,
fn pipe<R>(self, func: impl FnOnce(Self) -> R) -> Rwhere
Self: Sized,
§fn pipe_ref<'a, R>(&'a self, func: impl FnOnce(&'a Self) -> R) -> Rwhere
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§fn pipe_borrow_mut<'a, B, R>(
&'a mut self,
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) -> R
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§fn pipe_as_ref<'a, U, R>(&'a self, func: impl FnOnce(&'a U) -> R) -> R
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self
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self
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self
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§fn read_u8(&mut self) -> Result<u8, Error>
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§fn read_i8(&mut self) -> Result<i8, Error>
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§fn read_u16<T>(&mut self) -> Result<u16, Error>where
T: ByteOrder,
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T: ByteOrder,
§fn read_i16<T>(&mut self) -> Result<i16, Error>where
T: ByteOrder,
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T: ByteOrder,
§fn read_u24<T>(&mut self) -> Result<u32, Error>where
T: ByteOrder,
fn read_u24<T>(&mut self) -> Result<u32, Error>where
T: ByteOrder,
§fn read_i24<T>(&mut self) -> Result<i32, Error>where
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T: ByteOrder,
§fn read_u32<T>(&mut self) -> Result<u32, Error>where
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§fn read_i32<T>(&mut self) -> Result<i32, Error>where
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fn read_i32<T>(&mut self) -> Result<i32, Error>where
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§fn read_u48<T>(&mut self) -> Result<u64, Error>where
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T: ByteOrder,
§fn read_i48<T>(&mut self) -> Result<i64, Error>where
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§fn read_u64<T>(&mut self) -> Result<u64, Error>where
T: ByteOrder,
fn read_u64<T>(&mut self) -> Result<u64, Error>where
T: ByteOrder,
§fn read_i64<T>(&mut self) -> Result<i64, Error>where
T: ByteOrder,
fn read_i64<T>(&mut self) -> Result<i64, Error>where
T: ByteOrder,
§fn read_u128<T>(&mut self) -> Result<u128, Error>where
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fn read_u128<T>(&mut self) -> Result<u128, Error>where
T: ByteOrder,
§fn read_i128<T>(&mut self) -> Result<i128, Error>where
T: ByteOrder,
fn read_i128<T>(&mut self) -> Result<i128, Error>where
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§fn read_uint<T>(&mut self, nbytes: usize) -> Result<u64, Error>where
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T: ByteOrder,
§fn read_int<T>(&mut self, nbytes: usize) -> Result<i64, Error>where
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§fn read_uint128<T>(&mut self, nbytes: usize) -> Result<u128, Error>where
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T: ByteOrder,
§fn read_int128<T>(&mut self, nbytes: usize) -> Result<i128, Error>where
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T: ByteOrder,
§fn read_f32<T>(&mut self) -> Result<f32, Error>where
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fn read_f32<T>(&mut self) -> Result<f32, Error>where
T: ByteOrder,
§fn read_f64<T>(&mut self) -> Result<f64, Error>where
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