Enum gclient::ext::sp_core::sp_std::result::Result

1.0.0 · source ·
pub enum Result<T, E> {
    Ok(T),
    Err(E),
}
Expand description

Result is a type that represents either success (Ok) or failure (Err).

See the module documentation for details.

Variants§

§1.0.0

Ok(T)

Contains the success value

§1.0.0

Err(E)

Contains the error value

Implementations§

source§

impl<T, E> Result<T, E>

1.0.0 (const: 1.48.0) · source

pub const fn is_ok(&self) -> bool

Returns true if the result is Ok.

§Examples
let x: Result<i32, &str> = Ok(-3);
assert_eq!(x.is_ok(), true);

let x: Result<i32, &str> = Err("Some error message");
assert_eq!(x.is_ok(), false);
1.70.0 · source

pub fn is_ok_and(self, f: impl FnOnce(T) -> bool) -> bool

Returns true if the result is Ok and the value inside of it matches a predicate.

§Examples
let x: Result<u32, &str> = Ok(2);
assert_eq!(x.is_ok_and(|x| x > 1), true);

let x: Result<u32, &str> = Ok(0);
assert_eq!(x.is_ok_and(|x| x > 1), false);

let x: Result<u32, &str> = Err("hey");
assert_eq!(x.is_ok_and(|x| x > 1), false);
1.0.0 (const: 1.48.0) · source

pub const fn is_err(&self) -> bool

Returns true if the result is Err.

§Examples
let x: Result<i32, &str> = Ok(-3);
assert_eq!(x.is_err(), false);

let x: Result<i32, &str> = Err("Some error message");
assert_eq!(x.is_err(), true);
1.70.0 · source

pub fn is_err_and(self, f: impl FnOnce(E) -> bool) -> bool

Returns true if the result is Err and the value inside of it matches a predicate.

§Examples
use std::io::{Error, ErrorKind};

let x: Result<u32, Error> = Err(Error::new(ErrorKind::NotFound, "!"));
assert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), true);

let x: Result<u32, Error> = Err(Error::new(ErrorKind::PermissionDenied, "!"));
assert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), false);

let x: Result<u32, Error> = Ok(123);
assert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), false);
1.0.0 · source

pub fn ok(self) -> Option<T>

Converts from Result<T, E> to Option<T>.

Converts self into an Option<T>, consuming self, and discarding the error, if any.

§Examples
let x: Result<u32, &str> = Ok(2);
assert_eq!(x.ok(), Some(2));

let x: Result<u32, &str> = Err("Nothing here");
assert_eq!(x.ok(), None);
1.0.0 · source

pub fn err(self) -> Option<E>

Converts from Result<T, E> to Option<E>.

Converts self into an Option<E>, consuming self, and discarding the success value, if any.

§Examples
let x: Result<u32, &str> = Ok(2);
assert_eq!(x.err(), None);

let x: Result<u32, &str> = Err("Nothing here");
assert_eq!(x.err(), Some("Nothing here"));
1.0.0 (const: 1.48.0) · source

pub const fn as_ref(&self) -> Result<&T, &E>

Converts from &Result<T, E> to Result<&T, &E>.

Produces a new Result, containing a reference into the original, leaving the original in place.

§Examples
let x: Result<u32, &str> = Ok(2);
assert_eq!(x.as_ref(), Ok(&2));

let x: Result<u32, &str> = Err("Error");
assert_eq!(x.as_ref(), Err(&"Error"));
1.0.0 (const: unstable) · source

pub fn as_mut(&mut self) -> Result<&mut T, &mut E>

Converts from &mut Result<T, E> to Result<&mut T, &mut E>.

§Examples
fn mutate(r: &mut Result<i32, i32>) {
    match r.as_mut() {
        Ok(v) => *v = 42,
        Err(e) => *e = 0,
    }
}

let mut x: Result<i32, i32> = Ok(2);
mutate(&mut x);
assert_eq!(x.unwrap(), 42);

let mut x: Result<i32, i32> = Err(13);
mutate(&mut x);
assert_eq!(x.unwrap_err(), 0);
1.0.0 · source

pub fn map<U, F>(self, op: F) -> Result<U, E>
where F: FnOnce(T) -> U,

Maps a Result<T, E> to Result<U, E> by applying a function to a contained Ok value, leaving an Err value untouched.

This function can be used to compose the results of two functions.

§Examples

Print the numbers on each line of a string multiplied by two.

let line = "1\n2\n3\n4\n";

for num in line.lines() {
    match num.parse::<i32>().map(|i| i * 2) {
        Ok(n) => println!("{n}"),
        Err(..) => {}
    }
}
1.41.0 · source

pub fn map_or<U, F>(self, default: U, f: F) -> U
where F: FnOnce(T) -> U,

Returns the provided default (if Err), or applies a function to the contained value (if Ok).

Arguments passed to map_or are eagerly evaluated; if you are passing the result of a function call, it is recommended to use map_or_else, which is lazily evaluated.

§Examples
let x: Result<_, &str> = Ok("foo");
assert_eq!(x.map_or(42, |v| v.len()), 3);

let x: Result<&str, _> = Err("bar");
assert_eq!(x.map_or(42, |v| v.len()), 42);
1.41.0 · source

pub fn map_or_else<U, D, F>(self, default: D, f: F) -> U
where D: FnOnce(E) -> U, F: FnOnce(T) -> U,

Maps a Result<T, E> to U by applying fallback function default to a contained Err value, or function f to a contained Ok value.

This function can be used to unpack a successful result while handling an error.

§Examples
let k = 21;

let x : Result<_, &str> = Ok("foo");
assert_eq!(x.map_or_else(|e| k * 2, |v| v.len()), 3);

let x : Result<&str, _> = Err("bar");
assert_eq!(x.map_or_else(|e| k * 2, |v| v.len()), 42);
1.0.0 · source

pub fn map_err<F, O>(self, op: O) -> Result<T, F>
where O: FnOnce(E) -> F,

Maps a Result<T, E> to Result<T, F> by applying a function to a contained Err value, leaving an Ok value untouched.

This function can be used to pass through a successful result while handling an error.

§Examples
fn stringify(x: u32) -> String { format!("error code: {x}") }

let x: Result<u32, u32> = Ok(2);
assert_eq!(x.map_err(stringify), Ok(2));

let x: Result<u32, u32> = Err(13);
assert_eq!(x.map_err(stringify), Err("error code: 13".to_string()));
1.76.0 · source

pub fn inspect<F>(self, f: F) -> Result<T, E>
where F: FnOnce(&T),

Calls a function with a reference to the contained value if Ok.

Returns the original result.

§Examples
let x: u8 = "4"
    .parse::<u8>()
    .inspect(|x| println!("original: {x}"))
    .map(|x| x.pow(3))
    .expect("failed to parse number");
1.76.0 · source

pub fn inspect_err<F>(self, f: F) -> Result<T, E>
where F: FnOnce(&E),

Calls a function with a reference to the contained value if Err.

Returns the original result.

§Examples
use std::{fs, io};

fn read() -> io::Result<String> {
    fs::read_to_string("address.txt")
        .inspect_err(|e| eprintln!("failed to read file: {e}"))
}
1.47.0 · source

pub fn as_deref(&self) -> Result<&<T as Deref>::Target, &E>
where T: Deref,

Converts from Result<T, E> (or &Result<T, E>) to Result<&<T as Deref>::Target, &E>.

Coerces the Ok variant of the original Result via Deref and returns the new Result.

§Examples
let x: Result<String, u32> = Ok("hello".to_string());
let y: Result<&str, &u32> = Ok("hello");
assert_eq!(x.as_deref(), y);

let x: Result<String, u32> = Err(42);
let y: Result<&str, &u32> = Err(&42);
assert_eq!(x.as_deref(), y);
1.47.0 · source

pub fn as_deref_mut(&mut self) -> Result<&mut <T as Deref>::Target, &mut E>
where T: DerefMut,

Converts from Result<T, E> (or &mut Result<T, E>) to Result<&mut <T as DerefMut>::Target, &mut E>.

Coerces the Ok variant of the original Result via DerefMut and returns the new Result.

§Examples
let mut s = "HELLO".to_string();
let mut x: Result<String, u32> = Ok("hello".to_string());
let y: Result<&mut str, &mut u32> = Ok(&mut s);
assert_eq!(x.as_deref_mut().map(|x| { x.make_ascii_uppercase(); x }), y);

let mut i = 42;
let mut x: Result<String, u32> = Err(42);
let y: Result<&mut str, &mut u32> = Err(&mut i);
assert_eq!(x.as_deref_mut().map(|x| { x.make_ascii_uppercase(); x }), y);
1.0.0 · source

pub fn iter(&self) -> Iter<'_, T>

Returns an iterator over the possibly contained value.

The iterator yields one value if the result is Result::Ok, otherwise none.

§Examples
let x: Result<u32, &str> = Ok(7);
assert_eq!(x.iter().next(), Some(&7));

let x: Result<u32, &str> = Err("nothing!");
assert_eq!(x.iter().next(), None);
1.0.0 · source

pub fn iter_mut(&mut self) -> IterMut<'_, T>

Returns a mutable iterator over the possibly contained value.

The iterator yields one value if the result is Result::Ok, otherwise none.

§Examples
let mut x: Result<u32, &str> = Ok(7);
match x.iter_mut().next() {
    Some(v) => *v = 40,
    None => {},
}
assert_eq!(x, Ok(40));

let mut x: Result<u32, &str> = Err("nothing!");
assert_eq!(x.iter_mut().next(), None);
1.4.0 · source

pub fn expect(self, msg: &str) -> T
where E: Debug,

Returns the contained Ok value, consuming the self value.

Because this function may panic, its use is generally discouraged. Instead, prefer to use pattern matching and handle the Err case explicitly, or call unwrap_or, unwrap_or_else, or unwrap_or_default.

§Panics

Panics if the value is an Err, with a panic message including the passed message, and the content of the Err.

§Examples
let x: Result<u32, &str> = Err("emergency failure");
x.expect("Testing expect"); // panics with `Testing expect: emergency failure`

We recommend that expect messages are used to describe the reason you expect the Result should be Ok.

let path = std::env::var("IMPORTANT_PATH")
    .expect("env variable `IMPORTANT_PATH` should be set by `wrapper_script.sh`");

Hint: If you’re having trouble remembering how to phrase expect error messages remember to focus on the word “should” as in “env variable should be set by blah” or “the given binary should be available and executable by the current user”.

For more detail on expect message styles and the reasoning behind our recommendation please refer to the section on “Common Message Styles” in the std::error module docs.

1.0.0 · source

pub fn unwrap(self) -> T
where E: Debug,

Returns the contained Ok value, consuming the self value.

Because this function may panic, its use is generally discouraged. Instead, prefer to use pattern matching and handle the Err case explicitly, or call unwrap_or, unwrap_or_else, or unwrap_or_default.

§Panics

Panics if the value is an Err, with a panic message provided by the Err’s value.

§Examples

Basic usage:

let x: Result<u32, &str> = Ok(2);
assert_eq!(x.unwrap(), 2);
let x: Result<u32, &str> = Err("emergency failure");
x.unwrap(); // panics with `emergency failure`
1.16.0 · source

pub fn unwrap_or_default(self) -> T
where T: Default,

Returns the contained Ok value or a default

Consumes the self argument then, if Ok, returns the contained value, otherwise if Err, returns the default value for that type.

§Examples

Converts a string to an integer, turning poorly-formed strings into 0 (the default value for integers). parse converts a string to any other type that implements FromStr, returning an Err on error.

let good_year_from_input = "1909";
let bad_year_from_input = "190blarg";
let good_year = good_year_from_input.parse().unwrap_or_default();
let bad_year = bad_year_from_input.parse().unwrap_or_default();

assert_eq!(1909, good_year);
assert_eq!(0, bad_year);
1.17.0 · source

pub fn expect_err(self, msg: &str) -> E
where T: Debug,

Returns the contained Err value, consuming the self value.

§Panics

Panics if the value is an Ok, with a panic message including the passed message, and the content of the Ok.

§Examples
let x: Result<u32, &str> = Ok(10);
x.expect_err("Testing expect_err"); // panics with `Testing expect_err: 10`
1.0.0 · source

pub fn unwrap_err(self) -> E
where T: Debug,

Returns the contained Err value, consuming the self value.

§Panics

Panics if the value is an Ok, with a custom panic message provided by the Ok’s value.

§Examples
let x: Result<u32, &str> = Ok(2);
x.unwrap_err(); // panics with `2`
let x: Result<u32, &str> = Err("emergency failure");
assert_eq!(x.unwrap_err(), "emergency failure");
source

pub fn into_ok(self) -> T
where E: Into<!>,

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

Returns the contained Ok value, but never panics.

Unlike unwrap, this method is known to never panic on the result types it is implemented for. Therefore, it can be used instead of unwrap as a maintainability safeguard that will fail to compile if the error type of the Result is later changed to an error that can actually occur.

§Examples

fn only_good_news() -> Result<String, !> {
    Ok("this is fine".into())
}

let s: String = only_good_news().into_ok();
println!("{s}");
source

pub fn into_err(self) -> E
where T: Into<!>,

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

Returns the contained Err value, but never panics.

Unlike unwrap_err, this method is known to never panic on the result types it is implemented for. Therefore, it can be used instead of unwrap_err as a maintainability safeguard that will fail to compile if the ok type of the Result is later changed to a type that can actually occur.

§Examples

fn only_bad_news() -> Result<!, String> {
    Err("Oops, it failed".into())
}

let error: String = only_bad_news().into_err();
println!("{error}");
1.0.0 · source

pub fn and<U>(self, res: Result<U, E>) -> Result<U, E>

Returns res if the result is Ok, otherwise returns the Err value of self.

Arguments passed to and are eagerly evaluated; if you are passing the result of a function call, it is recommended to use and_then, which is lazily evaluated.

§Examples
let x: Result<u32, &str> = Ok(2);
let y: Result<&str, &str> = Err("late error");
assert_eq!(x.and(y), Err("late error"));

let x: Result<u32, &str> = Err("early error");
let y: Result<&str, &str> = Ok("foo");
assert_eq!(x.and(y), Err("early error"));

let x: Result<u32, &str> = Err("not a 2");
let y: Result<&str, &str> = Err("late error");
assert_eq!(x.and(y), Err("not a 2"));

let x: Result<u32, &str> = Ok(2);
let y: Result<&str, &str> = Ok("different result type");
assert_eq!(x.and(y), Ok("different result type"));
1.0.0 · source

pub fn and_then<U, F>(self, op: F) -> Result<U, E>
where F: FnOnce(T) -> Result<U, E>,

Calls op if the result is Ok, otherwise returns the Err value of self.

This function can be used for control flow based on Result values.

§Examples
fn sq_then_to_string(x: u32) -> Result<String, &'static str> {
    x.checked_mul(x).map(|sq| sq.to_string()).ok_or("overflowed")
}

assert_eq!(Ok(2).and_then(sq_then_to_string), Ok(4.to_string()));
assert_eq!(Ok(1_000_000).and_then(sq_then_to_string), Err("overflowed"));
assert_eq!(Err("not a number").and_then(sq_then_to_string), Err("not a number"));

Often used to chain fallible operations that may return Err.

use std::{io::ErrorKind, path::Path};

// Note: on Windows "/" maps to "C:\"
let root_modified_time = Path::new("/").metadata().and_then(|md| md.modified());
assert!(root_modified_time.is_ok());

let should_fail = Path::new("/bad/path").metadata().and_then(|md| md.modified());
assert!(should_fail.is_err());
assert_eq!(should_fail.unwrap_err().kind(), ErrorKind::NotFound);
1.0.0 · source

pub fn or<F>(self, res: Result<T, F>) -> Result<T, F>

Returns res if the result is Err, otherwise returns the Ok value of self.

Arguments passed to or are eagerly evaluated; if you are passing the result of a function call, it is recommended to use or_else, which is lazily evaluated.

§Examples
let x: Result<u32, &str> = Ok(2);
let y: Result<u32, &str> = Err("late error");
assert_eq!(x.or(y), Ok(2));

let x: Result<u32, &str> = Err("early error");
let y: Result<u32, &str> = Ok(2);
assert_eq!(x.or(y), Ok(2));

let x: Result<u32, &str> = Err("not a 2");
let y: Result<u32, &str> = Err("late error");
assert_eq!(x.or(y), Err("late error"));

let x: Result<u32, &str> = Ok(2);
let y: Result<u32, &str> = Ok(100);
assert_eq!(x.or(y), Ok(2));
1.0.0 · source

pub fn or_else<F, O>(self, op: O) -> Result<T, F>
where O: FnOnce(E) -> Result<T, F>,

Calls op if the result is Err, otherwise returns the Ok value of self.

This function can be used for control flow based on result values.

§Examples
fn sq(x: u32) -> Result<u32, u32> { Ok(x * x) }
fn err(x: u32) -> Result<u32, u32> { Err(x) }

assert_eq!(Ok(2).or_else(sq).or_else(sq), Ok(2));
assert_eq!(Ok(2).or_else(err).or_else(sq), Ok(2));
assert_eq!(Err(3).or_else(sq).or_else(err), Ok(9));
assert_eq!(Err(3).or_else(err).or_else(err), Err(3));
1.0.0 · source

pub fn unwrap_or(self, default: T) -> T

Returns the contained Ok value or a provided default.

Arguments passed to unwrap_or are eagerly evaluated; if you are passing the result of a function call, it is recommended to use unwrap_or_else, which is lazily evaluated.

§Examples
let default = 2;
let x: Result<u32, &str> = Ok(9);
assert_eq!(x.unwrap_or(default), 9);

let x: Result<u32, &str> = Err("error");
assert_eq!(x.unwrap_or(default), default);
1.0.0 · source

pub fn unwrap_or_else<F>(self, op: F) -> T
where F: FnOnce(E) -> T,

Returns the contained Ok value or computes it from a closure.

§Examples
fn count(x: &str) -> usize { x.len() }

assert_eq!(Ok(2).unwrap_or_else(count), 2);
assert_eq!(Err("foo").unwrap_or_else(count), 3);
1.58.0 · source

pub unsafe fn unwrap_unchecked(self) -> T

Returns the contained Ok value, consuming the self value, without checking that the value is not an Err.

§Safety

Calling this method on an Err is undefined behavior.

§Examples
let x: Result<u32, &str> = Ok(2);
assert_eq!(unsafe { x.unwrap_unchecked() }, 2);
let x: Result<u32, &str> = Err("emergency failure");
unsafe { x.unwrap_unchecked(); } // Undefined behavior!
1.58.0 · source

pub unsafe fn unwrap_err_unchecked(self) -> E

Returns the contained Err value, consuming the self value, without checking that the value is not an Ok.

§Safety

Calling this method on an Ok is undefined behavior.

§Examples
let x: Result<u32, &str> = Ok(2);
unsafe { x.unwrap_err_unchecked() }; // Undefined behavior!
let x: Result<u32, &str> = Err("emergency failure");
assert_eq!(unsafe { x.unwrap_err_unchecked() }, "emergency failure");
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impl<T, E> Result<&T, E>

1.59.0 · source

pub fn copied(self) -> Result<T, E>
where T: Copy,

Maps a Result<&T, E> to a Result<T, E> by copying the contents of the Ok part.

§Examples
let val = 12;
let x: Result<&i32, i32> = Ok(&val);
assert_eq!(x, Ok(&12));
let copied = x.copied();
assert_eq!(copied, Ok(12));
1.59.0 · source

pub fn cloned(self) -> Result<T, E>
where T: Clone,

Maps a Result<&T, E> to a Result<T, E> by cloning the contents of the Ok part.

§Examples
let val = 12;
let x: Result<&i32, i32> = Ok(&val);
assert_eq!(x, Ok(&12));
let cloned = x.cloned();
assert_eq!(cloned, Ok(12));
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impl<T, E> Result<&mut T, E>

1.59.0 · source

pub fn copied(self) -> Result<T, E>
where T: Copy,

Maps a Result<&mut T, E> to a Result<T, E> by copying the contents of the Ok part.

§Examples
let mut val = 12;
let x: Result<&mut i32, i32> = Ok(&mut val);
assert_eq!(x, Ok(&mut 12));
let copied = x.copied();
assert_eq!(copied, Ok(12));
1.59.0 · source

pub fn cloned(self) -> Result<T, E>
where T: Clone,

Maps a Result<&mut T, E> to a Result<T, E> by cloning the contents of the Ok part.

§Examples
let mut val = 12;
let x: Result<&mut i32, i32> = Ok(&mut val);
assert_eq!(x, Ok(&mut 12));
let cloned = x.cloned();
assert_eq!(cloned, Ok(12));
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impl<T, E> Result<Option<T>, E>

1.33.0 (const: unstable) · source

pub fn transpose(self) -> Option<Result<T, E>>

Transposes a Result of an Option into an Option of a Result.

Ok(None) will be mapped to None. Ok(Some(_)) and Err(_) will be mapped to Some(Ok(_)) and Some(Err(_)).

§Examples
#[derive(Debug, Eq, PartialEq)]
struct SomeErr;

let x: Result<Option<i32>, SomeErr> = Ok(Some(5));
let y: Option<Result<i32, SomeErr>> = Some(Ok(5));
assert_eq!(x.transpose(), y);
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impl<T, E> Result<Result<T, E>, E>

source

pub fn flatten(self) -> Result<T, E>

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

Converts from Result<Result<T, E>, E> to Result<T, E>

§Examples
#![feature(result_flattening)]
let x: Result<Result<&'static str, u32>, u32> = Ok(Ok("hello"));
assert_eq!(Ok("hello"), x.flatten());

let x: Result<Result<&'static str, u32>, u32> = Ok(Err(6));
assert_eq!(Err(6), x.flatten());

let x: Result<Result<&'static str, u32>, u32> = Err(6);
assert_eq!(Err(6), x.flatten());

Flattening only removes one level of nesting at a time:

#![feature(result_flattening)]
let x: Result<Result<Result<&'static str, u32>, u32>, u32> = Ok(Ok(Ok("hello")));
assert_eq!(Ok(Ok("hello")), x.flatten());
assert_eq!(Ok("hello"), x.flatten().flatten());

Trait Implementations§

1.0.0 · source§

impl<T, E> Clone for Result<T, E>
where T: Clone, E: Clone,

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fn clone(&self) -> Result<T, E>

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Result<T, E>)

Performs copy-assignment from source. Read more
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impl<T, E> Context<T, E> for Result<T, E>
where E: StdError + Send + Sync + 'static,

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fn context<C>(self, context: C) -> Result<T, Error>
where C: Display + Send + Sync + 'static,

Wrap the error value with additional context.
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fn with_context<C, F>(self, context: F) -> Result<T, Error>
where C: Display + Send + Sync + 'static, F: FnOnce() -> C,

Wrap the error value with additional context that is evaluated lazily only once an error does occur.
1.0.0 · source§

impl<T, E> Debug for Result<T, E>
where T: Debug, E: Debug,

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fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter. Read more
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impl<T, E> Decode for Result<T, E>
where T: Decode, E: Decode,

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fn decode<I>(input: &mut I) -> Result<Result<T, E>, Error>
where I: Input,

Attempt to deserialise the value from input.
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fn decode_into<I>( input: &mut I, dst: &mut MaybeUninit<Self>, ) -> Result<DecodeFinished, Error>
where I: Input,

Attempt to deserialize the value from input into a pre-allocated piece of memory. Read more
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fn skip<I>(input: &mut I) -> Result<(), Error>
where I: Input,

Attempt to skip the encoded value from input. Read more
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fn encoded_fixed_size() -> Option<usize>

Returns the fixed encoded size of the type. Read more
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impl<'de, T, E> Deserialize<'de> for Result<T, E>
where T: Deserialize<'de>, E: Deserialize<'de>,

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fn deserialize<D>( deserializer: D, ) -> Result<Result<T, E>, <D as Deserializer<'de>>::Error>
where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more
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impl<T, E> Encode for Result<T, E>
where T: Encode, E: Encode,

§

fn size_hint(&self) -> usize

If possible give a hint of expected size of the encoding. Read more
§

fn encode_to<W>(&self, dest: &mut W)
where W: Output + ?Sized,

Convert self to a slice and append it to the destination.
§

fn encode(&self) -> Vec<u8>

Convert self to an owned vector.
§

fn using_encoded<R, F>(&self, f: F) -> R
where F: FnOnce(&[u8]) -> R,

Convert self to a slice and then invoke the given closure with it.
§

fn encoded_size(&self) -> usize

Calculates the encoded size. Read more
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impl<T, E> EncodeAsType for Result<T, E>
where T: EncodeAsType, E: EncodeAsType,

§

fn encode_as_type_to<R>( &self, type_id: <R as TypeResolver>::TypeId, types: &R, out: &mut Vec<u8>, ) -> Result<(), Error>
where R: TypeResolver,

Given some type_id, types, a context and some output target for the SCALE encoded bytes, attempt to SCALE encode the current value into the type given by type_id.
§

fn encode_as_type<R>( &self, type_id: <R as TypeResolver>::TypeId, types: &R, ) -> Result<Vec<u8>, Error>
where R: TypeResolver,

This is a helper function which internally calls [EncodeAsType::encode_as_type_to]. Prefer to implement that instead.
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impl From<&StreamResult> for Result<MZStatus, MZError>

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fn from(res: &StreamResult) -> Result<MZStatus, MZError>

Converts to this type from the input type.
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impl From<&StreamResult> for Result<MZStatus, MZError>

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fn from(res: &StreamResult) -> Result<MZStatus, MZError>

Converts to this type from the input type.
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impl From<DispatchError> for Result<(), DispatchError>

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fn from(err: DispatchError) -> Result<(), DispatchError>

Converts to this type from the input type.
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impl From<Errors> for Result<(), Errors>

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fn from(e: Errors) -> Result<(), Errors>

Converts to this type from the input type.
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impl From<InvalidTransaction> for Result<ValidTransaction, TransactionValidityError>

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fn from( invalid_transaction: InvalidTransaction, ) -> Result<ValidTransaction, TransactionValidityError>

Converts to this type from the input type.
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impl From<Result<[u8; 4], u32>> for ErrorWithReplyCode

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fn from(result: Result<[u8; 4], u32>) -> ErrorWithReplyCode

Converts to this type from the input type.
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impl From<Result<(), u32>> for ErrorBytes

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fn from(value: Result<(), u32>) -> ErrorBytes

Converts to this type from the input type.
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impl<T1, T2> From<Result<(T1, T2), u32>> for ErrorWithTwoHashes
where T1: Into<[u8; 32]>, T2: Into<[u8; 32]>,

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fn from(result: Result<(T1, T2), u32>) -> ErrorWithTwoHashes

Converts to this type from the input type.
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impl<L, R> From<Result<R, L>> for Either<L, R>

Convert from Result to Either with Ok => Right and Err => Left.

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fn from(r: Result<R, L>) -> Either<L, R>

Converts to this type from the input type.
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impl<T> From<Result<T, u32>> for ErrorWithHash
where T: Into<[u8; 32]>,

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fn from(result: Result<T, u32>) -> ErrorWithHash

Converts to this type from the input type.
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impl From<Result<u32, u32>> for ErrorWithHandle

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fn from(result: Result<u32, u32>) -> ErrorWithHandle

Converts to this type from the input type.
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impl From<Result<u32, u32>> for ErrorWithSignalCode

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fn from(result: Result<u32, u32>) -> ErrorWithSignalCode

Converts to this type from the input type.
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impl From<Result<u64, u32>> for ErrorWithGas

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fn from(result: Result<u64, u32>) -> ErrorWithGas

Converts to this type from the input type.
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impl From<Result> for Result<(), Unspecified>

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fn from(ret: Result) -> Result<(), Unspecified>

Converts to this type from the input type.
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impl From<Result> for Result<(), Unspecified>

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fn from(ret: Result) -> Result<(), Unspecified>

Converts to this type from the input type.
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impl From<StreamResult> for Result<MZStatus, MZError>

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fn from(res: StreamResult) -> Result<MZStatus, MZError>

Converts to this type from the input type.
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impl From<StreamResult> for Result<MZStatus, MZError>

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fn from(res: StreamResult) -> Result<MZStatus, MZError>

Converts to this type from the input type.
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impl From<UnknownTransaction> for Result<ValidTransaction, TransactionValidityError>

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fn from( unknown_transaction: UnknownTransaction, ) -> Result<ValidTransaction, TransactionValidityError>

Converts to this type from the input type.
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impl From<ValidTransactionBuilder> for Result<ValidTransaction, TransactionValidityError>

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fn from( builder: ValidTransactionBuilder, ) -> Result<ValidTransaction, TransactionValidityError>

Converts to this type from the input type.
1.0.0 · source§

impl<A, E, V> FromIterator<Result<A, E>> for Result<V, E>
where V: FromIterator<A>,

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fn from_iter<I>(iter: I) -> Result<V, E>
where I: IntoIterator<Item = Result<A, E>>,

Takes each element in the Iterator: if it is an Err, no further elements are taken, and the Err is returned. Should no Err occur, a container with the values of each Result is returned.

Here is an example which increments every integer in a vector, checking for overflow:

let v = vec![1, 2];
let res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32|
    x.checked_add(1).ok_or("Overflow!")
).collect();
assert_eq!(res, Ok(vec![2, 3]));

Here is another example that tries to subtract one from another list of integers, this time checking for underflow:

let v = vec![1, 2, 0];
let res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32|
    x.checked_sub(1).ok_or("Underflow!")
).collect();
assert_eq!(res, Err("Underflow!"));

Here is a variation on the previous example, showing that no further elements are taken from iter after the first Err.

let v = vec![3, 2, 1, 10];
let mut shared = 0;
let res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32| {
    shared += x;
    x.checked_sub(2).ok_or("Underflow!")
}).collect();
assert_eq!(res, Err("Underflow!"));
assert_eq!(shared, 6);

Since the third element caused an underflow, no further elements were taken, so the final value of shared is 6 (= 3 + 2 + 1), not 16.

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impl<T, E, F> FromResidual<Result<Infallible, E>> for Poll<Option<Result<T, F>>>
where F: From<E>,

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fn from_residual(x: Result<Infallible, E>) -> Poll<Option<Result<T, F>>>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from a compatible Residual type. Read more
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impl<T, E, F> FromResidual<Result<Infallible, E>> for Poll<Result<T, F>>
where F: From<E>,

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fn from_residual(x: Result<Infallible, E>) -> Poll<Result<T, F>>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from a compatible Residual type. Read more
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impl<T, E, F> FromResidual<Result<Infallible, E>> for Result<T, F>
where F: From<E>,

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fn from_residual(residual: Result<Infallible, E>) -> Result<T, F>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from a compatible Residual type. Read more
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impl<T, E, F> FromResidual<Yeet<E>> for Result<T, F>
where F: From<E>,

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fn from_residual(_: Yeet<E>) -> Result<T, F>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from a compatible Residual type. Read more
1.0.0 · source§

impl<T, E> Hash for Result<T, E>
where T: Hash, E: Hash,

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fn hash<__H>(&self, state: &mut __H)
where __H: Hasher,

Feeds this value into the given Hasher. Read more
1.3.0 · source§

fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl<L, R> Into<Result<R, L>> for Either<L, R>

Convert from Either to Result with Right => Ok and Left => Err.

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fn into(self) -> Result<R, L>

Converts this type into the (usually inferred) input type.
1.4.0 · source§

impl<'a, T, E> IntoIterator for &'a Result<T, E>

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type Item = &'a T

The type of the elements being iterated over.
§

type IntoIter = Iter<'a, T>

Which kind of iterator are we turning this into?
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fn into_iter(self) -> Iter<'a, T>

Creates an iterator from a value. Read more
1.4.0 · source§

impl<'a, T, E> IntoIterator for &'a mut Result<T, E>

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type Item = &'a mut T

The type of the elements being iterated over.
§

type IntoIter = IterMut<'a, T>

Which kind of iterator are we turning this into?
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fn into_iter(self) -> IterMut<'a, T>

Creates an iterator from a value. Read more
1.0.0 · source§

impl<T, E> IntoIterator for Result<T, E>

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fn into_iter(self) -> IntoIter<T>

Returns a consuming iterator over the possibly contained value.

The iterator yields one value if the result is Result::Ok, otherwise none.

§Examples
let x: Result<u32, &str> = Ok(5);
let v: Vec<u32> = x.into_iter().collect();
assert_eq!(v, [5]);

let x: Result<u32, &str> = Err("nothing!");
let v: Vec<u32> = x.into_iter().collect();
assert_eq!(v, []);
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type Item = T

The type of the elements being iterated over.
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type IntoIter = IntoIter<T>

Which kind of iterator are we turning this into?
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impl<T, E> IntoVisitor for Result<T, E>
where T: IntoVisitor, E: IntoVisitor,

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type AnyVisitor<R: TypeResolver> = BasicVisitor<Result<T, E>, R>

The visitor type used to decode SCALE encoded bytes to Self.
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fn into_visitor<R>() -> <Result<T, E> as IntoVisitor>::AnyVisitor<R>
where R: TypeResolver,

A means of obtaining this visitor.
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impl<T, E> MaxEncodedLen for Result<T, E>

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fn max_encoded_len() -> usize

Upper bound, in bytes, of the maximum encoded size of this item.
1.0.0 · source§

impl<T, E> Ord for Result<T, E>
where T: Ord, E: Ord,

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fn cmp(&self, other: &Result<T, E>) -> Ordering

This method returns an Ordering between self and other. Read more
1.21.0 · source§

fn max(self, other: Self) -> Self
where Self: Sized,

Compares and returns the maximum of two values. Read more
1.21.0 · source§

fn min(self, other: Self) -> Self
where Self: Sized,

Compares and returns the minimum of two values. Read more
1.50.0 · source§

fn clamp(self, min: Self, max: Self) -> Self
where Self: Sized + PartialOrd,

Restrict a value to a certain interval. Read more
1.0.0 · source§

impl<T, E> PartialEq for Result<T, E>
where T: PartialEq, E: PartialEq,

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fn eq(&self, other: &Result<T, E>) -> bool

Tests for self and other values to be equal, and is used by ==.
1.0.0 · source§

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
1.0.0 · source§

impl<T, E> PartialOrd for Result<T, E>
where T: PartialOrd, E: PartialOrd,

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fn partial_cmp(&self, other: &Result<T, E>) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more
1.0.0 · source§

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator. Read more
1.0.0 · source§

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator. Read more
1.0.0 · source§

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator. Read more
1.0.0 · source§

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator. Read more
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impl<T, E> PassBy for Result<T, E>
where T: Codec, E: Codec,

§

type PassBy = Codec<Result<T, E>>

The strategy that should be used to pass the type.
1.16.0 · source§

impl<T, U, E> Product<Result<U, E>> for Result<T, E>
where T: Product<U>,

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fn product<I>(iter: I) -> Result<T, E>
where I: Iterator<Item = Result<U, E>>,

Takes each element in the Iterator: if it is an Err, no further elements are taken, and the Err is returned. Should no Err occur, the product of all elements is returned.

§Examples

This multiplies each number in a vector of strings, if a string could not be parsed the operation returns Err:

let nums = vec!["5", "10", "1", "2"];
let total: Result<usize, _> = nums.iter().map(|w| w.parse::<usize>()).product();
assert_eq!(total, Ok(100));
let nums = vec!["5", "10", "one", "2"];
let total: Result<usize, _> = nums.iter().map(|w| w.parse::<usize>()).product();
assert!(total.is_err());
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impl<T, E> Residual<T> for Result<Infallible, E>

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type TryType = Result<T, E>

🔬This is a nightly-only experimental API. (try_trait_v2_residual)
The “return” type of this meta-function.
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impl<T, E> Serialize for Result<T, E>
where T: Serialize, E: Serialize,

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fn serialize<S>( &self, serializer: S, ) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error>
where S: Serializer,

Serialize this value into the given Serde serializer. Read more
1.16.0 · source§

impl<T, U, E> Sum<Result<U, E>> for Result<T, E>
where T: Sum<U>,

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fn sum<I>(iter: I) -> Result<T, E>
where I: Iterator<Item = Result<U, E>>,

Takes each element in the Iterator: if it is an Err, no further elements are taken, and the Err is returned. Should no Err occur, the sum of all elements is returned.

§Examples

This sums up every integer in a vector, rejecting the sum if a negative element is encountered:

let f = |&x: &i32| if x < 0 { Err("Negative element found") } else { Ok(x) };
let v = vec![1, 2];
let res: Result<i32, _> = v.iter().map(f).sum();
assert_eq!(res, Ok(3));
let v = vec![1, -2];
let res: Result<i32, _> = v.iter().map(f).sum();
assert_eq!(res, Err("Negative element found"));
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impl<T, E> TapFallible for Result<T, E>

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type Ok = T

The interior type used to indicate a successful construction.
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type Err = E

The interior type used to indicate a failed construction.
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fn tap_ok(self, func: impl FnOnce(&T)) -> Result<T, E>

Immutably accesses an interior success value. Read more
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fn tap_ok_mut(self, func: impl FnOnce(&mut T)) -> Result<T, E>

Mutably accesses an interior success value. Read more
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fn tap_err(self, func: impl FnOnce(&E)) -> Result<T, E>

Immutably accesses an interior failure value. Read more
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fn tap_err_mut(self, func: impl FnOnce(&mut E)) -> Result<T, E>

Mutably accesses an interior failure value. Read more
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fn tap_ok_dbg(self, func: impl FnOnce(&Self::Ok)) -> Self

Calls .tap_ok() only in debug builds, and is erased in release builds.
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fn tap_ok_mut_dbg(self, func: impl FnOnce(&mut Self::Ok)) -> Self

Calls .tap_ok_mut() only in debug builds, and is erased in release builds.
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fn tap_err_dbg(self, func: impl FnOnce(&Self::Err)) -> Self

Calls .tap_err() only in debug builds, and is erased in release builds.
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fn tap_err_mut_dbg(self, func: impl FnOnce(&mut Self::Err)) -> Self

Calls .tap_err_mut() only in debug builds, and is erased in release builds.
1.61.0 · source§

impl<T, E> Termination for Result<T, E>
where T: Termination, E: Debug,

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fn report(self) -> ExitCode

Is called to get the representation of the value as status code. This status code is returned to the operating system.
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impl<T, E> Try for Result<T, E>

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type Output = T

🔬This is a nightly-only experimental API. (try_trait_v2)
The type of the value produced by ? when not short-circuiting.
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type Residual = Result<Infallible, E>

🔬This is a nightly-only experimental API. (try_trait_v2)
The type of the value passed to FromResidual::from_residual as part of ? when short-circuiting. Read more
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fn from_output(output: <Result<T, E> as Try>::Output) -> Result<T, E>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from its Output type. Read more
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fn branch( self, ) -> ControlFlow<<Result<T, E> as Try>::Residual, <Result<T, E> as Try>::Output>

🔬This is a nightly-only experimental API. (try_trait_v2)
Used in ? to decide whether the operator should produce a value (because this returned ControlFlow::Continue) or propagate a value back to the caller (because this returned ControlFlow::Break). Read more
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impl<T, E> TypeInfo for Result<T, E>
where T: TypeInfo + 'static, E: TypeInfo + 'static,

§

type Identity = Result<T, E>

The type identifying for which type info is provided. Read more
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fn type_info() -> Type

Returns the static type identifier for Self.
1.0.0 · source§

impl<T, E> Copy for Result<T, E>
where T: Copy, E: Copy,

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impl<T, LikeT, E, LikeE> EncodeLike<Result<LikeT, LikeE>> for Result<T, E>
where T: EncodeLike<LikeT>, LikeT: Encode, E: EncodeLike<LikeE>, LikeE: Encode,

1.0.0 · source§

impl<T, E> Eq for Result<T, E>
where T: Eq, E: Eq,

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impl<T, U, E> FromStream<Result<T, E>> for Result<U, E>
where U: FromStream<T>,

1.0.0 · source§

impl<T, E> StructuralPartialEq for Result<T, E>

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impl<T> WasmRet for Result<T, Error>
where T: WasmRet,

Auto Trait Implementations§

§

impl<T, E> Freeze for Result<T, E>
where T: Freeze, E: Freeze,

§

impl<T, E> RefUnwindSafe for Result<T, E>

§

impl<T, E> Send for Result<T, E>
where T: Send, E: Send,

§

impl<T, E> Sync for Result<T, E>
where T: Sync, E: Sync,

§

impl<T, E> Unpin for Result<T, E>
where T: Unpin, E: Unpin,

§

impl<T, E> UnwindSafe for Result<T, E>
where T: UnwindSafe, E: UnwindSafe,

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CallHasher for T
where T: Hash + ?Sized,

§

default fn get_hash<H, B>(value: &H, build_hasher: &B) -> u64
where H: Hash + ?Sized, B: BuildHasher,

§

impl<T> CheckedConversion for T

§

fn checked_from<T>(t: T) -> Option<Self>
where Self: TryFrom<T>,

Convert from a value of T into an equivalent instance of Option<Self>. Read more
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fn checked_into<T>(self) -> Option<T>
where Self: TryInto<T>,

Consume self to return Some equivalent value of Option<T>. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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default unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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impl<T> CloneToUninit for T
where T: Copy,

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unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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impl<Q, K> Comparable<K> for Q
where Q: Ord + ?Sized, K: Borrow<Q> + ?Sized,

§

fn compare(&self, key: &K) -> Ordering

Compare self to key and return their ordering.
§

impl<T> Conv for T

§

fn conv<T>(self) -> T
where Self: Into<T>,

Converts self into T using Into<T>. Read more
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impl<T> DecodeAll for T
where T: Decode,

§

fn decode_all(input: &mut &[u8]) -> Result<T, Error>

Decode Self and consume all of the given input data. Read more
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impl<T> DecodeAsType for T
where T: IntoVisitor,

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fn decode_as_type_maybe_compact<R>( input: &mut &[u8], type_id: <R as TypeResolver>::TypeId, types: &R, is_compact: bool, ) -> Result<T, Error>
where R: TypeResolver,

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fn decode_as_type<R>( input: &mut &[u8], type_id: <R as TypeResolver>::TypeId, types: &R, ) -> Result<Self, Error>
where R: TypeResolver,

Given some input bytes, a type_id, and type registry, attempt to decode said bytes into Self. Implementations should modify the &mut reference to the bytes such that any bytes not used in the course of decoding are still pointed to after decoding is complete.
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impl<T> DecodeLimit for T
where T: Decode,

§

fn decode_all_with_depth_limit( limit: u32, input: &mut &[u8], ) -> Result<T, Error>

Decode Self and consume all of the given input data. Read more
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fn decode_with_depth_limit<I>(limit: u32, input: &mut I) -> Result<T, Error>
where I: Input,

Decode Self with the given maximum recursion depth and advance input by the number of bytes consumed. Read more
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impl<T> DecodeWithMetadata for T
where T: DecodeAsType,

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fn decode_with_metadata( bytes: &mut &[u8], type_id: u32, metadata: &Metadata, ) -> Result<T, Error>

Given some metadata and a type ID, attempt to SCALE decode the provided bytes into Self.
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impl<T> Downcast for T
where T: Any,

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fn into_any(self: Box<T>) -> Box<dyn Any>

Convert Box<dyn Trait> (where Trait: Downcast) to Box<dyn Any>. Box<dyn Any> can then be further downcast into Box<ConcreteType> where ConcreteType implements Trait.
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fn into_any_rc(self: Rc<T>) -> Rc<dyn Any>

Convert Rc<Trait> (where Trait: Downcast) to Rc<Any>. Rc<Any> can then be further downcast into Rc<ConcreteType> where ConcreteType implements Trait.
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fn as_any(&self) -> &(dyn Any + 'static)

Convert &Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &Any’s vtable from &Trait’s.
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fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)

Convert &mut Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &mut Any’s vtable from &mut Trait’s.
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impl<T> DowncastSync for T
where T: Any + Send + Sync,

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fn into_any_arc(self: Arc<T>) -> Arc<dyn Any + Send + Sync>

Convert Arc<Trait> (where Trait: Downcast) to Arc<Any>. Arc<Any> can then be further downcast into Arc<ConcreteType> where ConcreteType implements Trait.
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impl<T> DynClone for T
where T: Clone,

source§

fn __clone_box(&self, _: Private) -> *mut ()

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impl<T> EncodeWithMetadata for T
where T: EncodeAsType,

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fn encode_with_metadata( &self, type_id: u32, metadata: &Metadata, bytes: &mut Vec<u8>, ) -> Result<(), Error>

SCALE encode this type to bytes, possibly with the help of metadata.

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impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

§

fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more
source§

impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

source§

fn equivalent(&self, key: &K) -> bool

Compare self to key and return true if they are equal.
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impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

§

fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more
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impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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fn equivalent(&self, key: &K) -> bool

Compare self to key and return true if they are equal.
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impl<I> EventProcessor for I
where I: IntoIterator<Item = RuntimeEvent> + Clone,

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fn not_waited() -> Error

This function is called if a received event has an unexpected type. Read more
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fn proc<'life0, 'async_trait, T>( &'life0 mut self, predicate: impl Fn(RuntimeEvent) -> Option<T> + 'async_trait, ) -> Pin<Box<dyn Future<Output = Result<T, Error>> + 'async_trait>>
where 'life0: 'async_trait, T: 'async_trait, I: 'async_trait,

Event processing function. Read more
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fn proc_many<'life0, 'async_trait, T>( &'life0 mut self, predicate: impl Fn(RuntimeEvent) -> Option<T> + 'async_trait, validate: impl Fn(Vec<T>) -> (Vec<T>, bool) + 'async_trait, ) -> Pin<Box<dyn Future<Output = Result<Vec<T>, Error>> + 'async_trait>>
where 'life0: 'async_trait, T: 'async_trait, I: 'async_trait,

Multiple events processing function. Read more
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fn message_processed<'life0, 'async_trait>( &'life0 mut self, message_id: MessageId, ) -> Pin<Box<dyn Future<Output = Result<DispatchStatus>> + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait,

Check whether the message identified by message_id has been processed.
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fn message_processed_batch<'life0, 'async_trait>( &'life0 mut self, message_ids: impl 'async_trait + IntoIterator<Item = MessageId>, ) -> Pin<Box<dyn Future<Output = Result<Vec<(MessageId, DispatchStatus)>>> + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait,

Check whether the batch of messages identified by corresponding message_ids has been processed.
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fn reply_bytes_on<'life0, 'async_trait>( &'life0 mut self, message_id: MessageId, ) -> Pin<Box<dyn Future<Output = Result<(MessageId, Result<Vec<u8>, String>, u128)>> + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait,

Get details of a reply to the message identified by message_id. Read more
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fn err_or_succeed<'life0, 'async_trait>( &'life0 mut self, message_id: MessageId, ) -> Pin<Box<dyn Future<Output = Result<Option<String>>> + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait,

Check whether the processing of a message identified by message_id resulted in an error or has been successful. Read more
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fn err_or_succeed_batch<'life0, 'async_trait>( &'life0 mut self, message_ids: impl 'async_trait + IntoIterator<Item = MessageId>, ) -> Pin<Box<dyn Future<Output = Result<Vec<(MessageId, Option<String>)>>> + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait,

Check whether processing batch of messages identified by corresponding message_ids resulted in errors or has been successful. Read more
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impl<T> FmtForward for T

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fn fmt_binary(self) -> FmtBinary<Self>
where Self: Binary,

Causes self to use its Binary implementation when Debug-formatted.
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fn fmt_display(self) -> FmtDisplay<Self>
where Self: Display,

Causes self to use its Display implementation when Debug-formatted.
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fn fmt_lower_exp(self) -> FmtLowerExp<Self>
where Self: LowerExp,

Causes self to use its LowerExp implementation when Debug-formatted.
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fn fmt_lower_hex(self) -> FmtLowerHex<Self>
where Self: LowerHex,

Causes self to use its LowerHex implementation when Debug-formatted.
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fn fmt_octal(self) -> FmtOctal<Self>
where Self: Octal,

Causes self to use its Octal implementation when Debug-formatted.
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fn fmt_pointer(self) -> FmtPointer<Self>
where Self: Pointer,

Causes self to use its Pointer implementation when Debug-formatted.
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fn fmt_upper_exp(self) -> FmtUpperExp<Self>
where Self: UpperExp,

Causes self to use its UpperExp implementation when Debug-formatted.
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fn fmt_upper_hex(self) -> FmtUpperHex<Self>
where Self: UpperHex,

Causes self to use its UpperHex implementation when Debug-formatted.
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fn fmt_list(self) -> FmtList<Self>
where &'a Self: for<'a> IntoIterator,

Formats each item in a sequence. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> FromBits<T> for T

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fn from_bits(other: T) -> T

Convert other to Self, preserving bitwise representation
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impl<T> FromFFIValue for T
where T: PassBy,

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type SelfInstance = T

As Self can be an unsized type, it needs to be represented by a sized type at the host. This SelfInstance is the sized type.
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fn from_ffi_value( context: &mut dyn FunctionContext, arg: <<T as PassBy>::PassBy as RIType>::FFIType, ) -> Result<T, String>

Create SelfInstance from the given
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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided [Span], returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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impl<T> IntoFFIValue for T
where T: PassBy,

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fn into_ffi_value( self, context: &mut dyn FunctionContext, ) -> Result<<<T as PassBy>::PassBy as RIType>::FFIType, String>

Convert self into a ffi value.
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impl<T, Outer> IsWrappedBy<Outer> for T
where Outer: AsRef<T> + AsMut<T> + From<T>, T: From<Outer>,

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fn from_ref(outer: &Outer) -> &T

Get a reference to the inner from the outer.

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fn from_mut(outer: &mut Outer) -> &mut T

Get a mutable reference to the inner from the outer.

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impl<T> KeyedVec for T
where T: Codec,

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fn to_keyed_vec(&self, prepend_key: &[u8]) -> Vec<u8>

Return an encoding of Self prepended by given slice.
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impl<T> Pipe for T
where T: ?Sized,

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fn pipe<R>(self, func: impl FnOnce(Self) -> R) -> R
where Self: Sized,

Pipes by value. This is generally the method you want to use. Read more
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fn pipe_ref<'a, R>(&'a self, func: impl FnOnce(&'a Self) -> R) -> R
where R: 'a,

Borrows self and passes that borrow into the pipe function. Read more
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fn pipe_ref_mut<'a, R>(&'a mut self, func: impl FnOnce(&'a mut Self) -> R) -> R
where R: 'a,

Mutably borrows self and passes that borrow into the pipe function. Read more
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fn pipe_borrow<'a, B, R>(&'a self, func: impl FnOnce(&'a B) -> R) -> R
where Self: Borrow<B>, B: 'a + ?Sized, R: 'a,

Borrows self, then passes self.borrow() into the pipe function. Read more
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fn pipe_borrow_mut<'a, B, R>( &'a mut self, func: impl FnOnce(&'a mut B) -> R, ) -> R
where Self: BorrowMut<B>, B: 'a + ?Sized, R: 'a,

Mutably borrows self, then passes self.borrow_mut() into the pipe function. Read more
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fn pipe_as_ref<'a, U, R>(&'a self, func: impl FnOnce(&'a U) -> R) -> R
where Self: AsRef<U>, U: 'a + ?Sized, R: 'a,

Borrows self, then passes self.as_ref() into the pipe function.
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fn pipe_as_mut<'a, U, R>(&'a mut self, func: impl FnOnce(&'a mut U) -> R) -> R
where Self: AsMut<U>, U: 'a + ?Sized, R: 'a,

Mutably borrows self, then passes self.as_mut() into the pipe function.
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fn pipe_deref<'a, T, R>(&'a self, func: impl FnOnce(&'a T) -> R) -> R
where Self: Deref<Target = T>, T: 'a + ?Sized, R: 'a,

Borrows self, then passes self.deref() into the pipe function.
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fn pipe_deref_mut<'a, T, R>( &'a mut self, func: impl FnOnce(&'a mut T) -> R, ) -> R
where Self: DerefMut<Target = T> + Deref, T: 'a + ?Sized, R: 'a,

Mutably borrows self, then passes self.deref_mut() into the pipe function.
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impl<T> RIType for T
where T: PassBy,

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type FFIType = <<T as PassBy>::PassBy as RIType>::FFIType

The ffi type that is used to represent Self.
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impl<T> Same for T

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type Output = T

Should always be Self
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impl<T> SaturatedConversion for T

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fn saturated_from<T>(t: T) -> Self
where Self: UniqueSaturatedFrom<T>,

Convert from a value of T into an equivalent instance of Self. Read more
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fn saturated_into<T>(self) -> T
where Self: UniqueSaturatedInto<T>,

Consume self to return an equivalent value of T. Read more
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impl<T> Tap for T

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fn tap(self, func: impl FnOnce(&Self)) -> Self

Immutable access to a value. Read more
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fn tap_mut(self, func: impl FnOnce(&mut Self)) -> Self

Mutable access to a value. Read more
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fn tap_borrow<B>(self, func: impl FnOnce(&B)) -> Self
where Self: Borrow<B>, B: ?Sized,

Immutable access to the Borrow<B> of a value. Read more
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fn tap_borrow_mut<B>(self, func: impl FnOnce(&mut B)) -> Self
where Self: BorrowMut<B>, B: ?Sized,

Mutable access to the BorrowMut<B> of a value. Read more
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fn tap_ref<R>(self, func: impl FnOnce(&R)) -> Self
where Self: AsRef<R>, R: ?Sized,

Immutable access to the AsRef<R> view of a value. Read more
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fn tap_ref_mut<R>(self, func: impl FnOnce(&mut R)) -> Self
where Self: AsMut<R>, R: ?Sized,

Mutable access to the AsMut<R> view of a value. Read more
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fn tap_deref<T>(self, func: impl FnOnce(&T)) -> Self
where Self: Deref<Target = T>, T: ?Sized,

Immutable access to the Deref::Target of a value. Read more
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fn tap_deref_mut<T>(self, func: impl FnOnce(&mut T)) -> Self
where Self: DerefMut<Target = T> + Deref, T: ?Sized,

Mutable access to the Deref::Target of a value. Read more
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fn tap_dbg(self, func: impl FnOnce(&Self)) -> Self

Calls .tap() only in debug builds, and is erased in release builds.
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fn tap_mut_dbg(self, func: impl FnOnce(&mut Self)) -> Self

Calls .tap_mut() only in debug builds, and is erased in release builds.
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fn tap_borrow_dbg<B>(self, func: impl FnOnce(&B)) -> Self
where Self: Borrow<B>, B: ?Sized,

Calls .tap_borrow() only in debug builds, and is erased in release builds.
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fn tap_borrow_mut_dbg<B>(self, func: impl FnOnce(&mut B)) -> Self
where Self: BorrowMut<B>, B: ?Sized,

Calls .tap_borrow_mut() only in debug builds, and is erased in release builds.
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fn tap_ref_dbg<R>(self, func: impl FnOnce(&R)) -> Self
where Self: AsRef<R>, R: ?Sized,

Calls .tap_ref() only in debug builds, and is erased in release builds.
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fn tap_ref_mut_dbg<R>(self, func: impl FnOnce(&mut R)) -> Self
where Self: AsMut<R>, R: ?Sized,

Calls .tap_ref_mut() only in debug builds, and is erased in release builds.
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fn tap_deref_dbg<T>(self, func: impl FnOnce(&T)) -> Self
where Self: Deref<Target = T>, T: ?Sized,

Calls .tap_deref() only in debug builds, and is erased in release builds.
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fn tap_deref_mut_dbg<T>(self, func: impl FnOnce(&mut T)) -> Self
where Self: DerefMut<Target = T> + Deref, T: ?Sized,

Calls .tap_deref_mut() only in debug builds, and is erased in release builds.
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T> TryConv for T

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fn try_conv<T>(self) -> Result<T, Self::Error>
where Self: TryInto<T>,

Attempts to convert self into T using TryInto<T>. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<S, T> UncheckedInto<T> for S
where T: UncheckedFrom<S>,

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fn unchecked_into(self) -> T

The counterpart to unchecked_from.
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impl<T, S> UniqueSaturatedInto<T> for S
where T: Bounded, S: TryInto<T>,

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fn unique_saturated_into(self) -> T

Consume self to return an equivalent value of T.
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impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V

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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a [WithDispatch] wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a [WithDispatch] wrapper. Read more
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impl<S> Codec for S
where S: Decode + Encode,

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impl<T> DeserializeOwned for T
where T: for<'de> Deserialize<'de>,

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impl<T> EncodeLike<&&T> for T
where T: Encode,

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impl<T> EncodeLike<&T> for T
where T: Encode,

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impl<T> EncodeLike<&mut T> for T
where T: Encode,

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impl<T> EncodeLike<Arc<T>> for T
where T: Encode,

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impl<T> EncodeLike<Box<T>> for T
where T: Encode,

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impl<'a, T> EncodeLike<Cow<'a, T>> for T
where T: ToOwned + Encode,

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impl<T> EncodeLike<Rc<T>> for T
where T: Encode,

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impl<S> FullCodec for S
where S: Decode + FullEncode,

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impl<S> FullEncode for S
where S: Encode + EncodeLike,

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impl<T> JsonSchemaMaybe for T

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impl<T> MaybeDebug for T
where T: Debug,

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impl<T> MaybeHash for T
where T: Hash,

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impl<T> MaybeHash for T
where T: Hash,

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impl<T> MaybeRefUnwindSafe for T
where T: RefUnwindSafe,

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impl<T> MaybeSend for T
where T: Send,

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impl<T> MaybeSend for T
where T: Send,

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impl<T> MaybeSerialize for T
where T: Serialize,

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impl<T> MaybeSerializeDeserialize for T

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impl<T> Member for T
where T: Send + Sync + Debug + Eq + PartialEq + Clone + 'static,

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impl<T> StaticTypeInfo for T
where T: TypeInfo + 'static,