rama::crypto::dep::x509_parser::prelude::asn1_rs::nom::lib::std::convert

Trait From

pub trait From<T>: Sized {
    // Required method
    fn from(value: T) -> Self;
}

Available on crate features crypto and std only.

Expand description

Used to do value-to-value conversions while consuming the input value. It is the reciprocal of Into.

One should always prefer implementing From over Into because implementing From automatically provides one with an implementation of Into thanks to the blanket implementation in the standard library.

Only implement Into when targeting a version prior to Rust 1.41 and converting to a type outside the current crate. From was not able to do these types of conversions in earlier versions because of Rust’s orphaning rules. See Into for more details.

Prefer using Into over From when specifying trait bounds on a generic function to ensure that types that only implement Into can be used as well.

The From trait is also very useful when performing error handling. When constructing a function that is capable of failing, the return type will generally be of the form Result<T, E>. From simplifies error handling by allowing a function to return a single error type that encapsulates multiple error types. See the “Examples” section and the book for more details.

Note: This trait must not fail. The From trait is intended for perfect conversions. If the conversion can fail or is not perfect, use TryFrom.

§Generic Implementations

From<T> for U implies Into<U> for T
From is reflexive, which means that From<T> for T is implemented

§When to implement `From`

While there’s no technical restrictions on which conversions can be done using a From implementation, the general expectation is that the conversions should typically be restricted as follows:

The conversion is infallible: if the conversion can fail, use TryFrom instead; don’t provide a From impl that panics.
The conversion is lossless: semantically, it should not lose or discard information. For example, i32: From<u16> exists, where the original value can be recovered using u16: TryFrom<i32>. And String: From<&str> exists, where you can get something equivalent to the original value via Deref. But From cannot be used to convert from u32 to u16, since that cannot succeed in a lossless way. (There’s some wiggle room here for information not considered semantically relevant. For example, Box<[T]>: From<Vec<T>> exists even though it might not preserve capacity, like how two vectors can be equal despite differing capacities.)
The conversion is value-preserving: the conceptual kind and meaning of the resulting value is the same, even though the Rust type and technical representation might be different. For example -1_i8 as u8 is lossless, since as casting back can recover the original value, but that conversion is not available via From because -1 and 255 are different conceptual values (despite being identical bit patterns technically). But f32: From<i16> is available because 1_i16 and 1.0_f32 are conceptually the same real number (despite having very different bit patterns technically). String: From<char> is available because they’re both text, but String: From<u32> is not available, since 1 (a number) and "1" (text) are too different. (Converting values to text is instead covered by the Display trait.)
The conversion is obvious: it’s the only reasonable conversion between the two types. Otherwise it’s better to have it be a named method or constructor, like how str::as_bytes is a method and how integers have methods like u32::from_ne_bytes, u32::from_le_bytes, and u32::from_be_bytes, none of which are From implementations. Whereas there’s only one reasonable way to wrap an Ipv6Addr into an IpAddr, thus IpAddr: From<Ipv6Addr> exists.

§Examples

String implements From<&str>:

An explicit conversion from a &str to a String is done as follows:

let string = "hello".to_string();
let other_string = String::from("hello");

assert_eq!(string, other_string);

While performing error handling it is often useful to implement From for your own error type. By converting underlying error types to our own custom error type that encapsulates the underlying error type, we can return a single error type without losing information on the underlying cause. The ‘?’ operator automatically converts the underlying error type to our custom error type with From::from.

use std::fs;
use std::io;
use std::num;

enum CliError {
    IoError(io::Error),
    ParseError(num::ParseIntError),
}

impl From<io::Error> for CliError {
    fn from(error: io::Error) -> Self {
        CliError::IoError(error)
    }
}

impl From<num::ParseIntError> for CliError {
    fn from(error: num::ParseIntError) -> Self {
        CliError::ParseError(error)
    }
}

fn open_and_parse_file(file_name: &str) -> Result<i32, CliError> {
    let mut contents = fs::read_to_string(&file_name)?;
    let num: i32 = contents.trim().parse()?;
    Ok(num)
}

Required Methods§

1.0.0 (const: unstable) · Source

fn from(value: T) -> Self

Converts to this type from the input type.

Dyn Compatibility§

This trait is not dyn compatible.

impl From<&Handle> for NonNull<Entry>

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impl From<&LanguageIdentifier> for (Language, Option<Script>, Option<Region>)

Convert from a [LanguageIdentifier] to an LSR tuple.

§Examples

use icu::locale::{
    langid,
    subtags::{language, region, script},
};

let lid = langid!("en-Latn-US");
let (lang, script, region) = (&lid).into();

assert_eq!(lang, language!("en"));
assert_eq!(script, Some(script!("Latn")));
assert_eq!(region, Some(region!("US")));

impl From<&PerMessageDeflateConfig> for rama::http::headers::sec_websocket_extensions::PerMessageDeflateConfig

Available on crate feature compression only.

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impl From<&PublicKey> for rama::crypto::dep::aws_lc_rs::signature::RsaPublicKeyComponents<Vec<u8>>

Available on crate feature ring-io only.

impl From<&SpanContext> for TraceContext

Available on crate feature trace only.

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impl From<&String> for ArcStr

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impl From<&String> for RawString

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impl From<&String> for SmolStr

1.35.0 · Source§

impl From<&String> for String

Available on non-no_global_oom_handling only.

Available on crate feature alloc only.

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impl From<&UriTemplateStr> for rama::utils::collections::smallvec::alloc::boxed::Box<UriTemplateStr>

Available on crate feature alloc only.

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impl From<&UriTemplateStr> for Rc<UriTemplateStr>

Available on crate feature alloc only.

Available on target_has_atomic=ptr only.

Available on non-no_global_oom_handling only.

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impl From<&mut str> for ArcStr

1.84.0 · Source§

impl From<&mut str> for rama::utils::collections::smallvec::alloc::boxed::Box<str>

Available on non-no_global_oom_handling only.

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impl From<&str> for AtomText

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impl From<&str> for BaggageMetadata

1.17.0 · Source§

impl From<&str> for rama::utils::collections::smallvec::alloc::boxed::Box<str>

Available on non-no_global_oom_handling only.

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impl From<&str> for HeapReader

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impl From<&str> for Vec<u8>

Available on non-no_global_oom_handling only.

use icu::locale::{
    langid,
    subtags::{language, region, script},
    LanguageIdentifier,
};

let lang = language!("en");
let script = script!("Latn");
let region = region!("US");
assert_eq!(
    LanguageIdentifier::from((lang, Some(script), Some(region))),
    langid!("en-Latn-US")
);

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impl From<(Language, Option<Script>, Option<Region>)> for Locale

§Examples

use icu::locale::Locale;
use icu::locale::{
    locale,
    subtags::{language, region, script},
};

assert_eq!(
    Locale::from((
        language!("en"),
        Some(script!("Latn")),
        Some(region!("US"))
    )),
    locale!("en-Latn-US")
);

impl From<Authority> for Uri

Convert an Authority into a Uri.

Available on non-no_global_oom_handling only.

Converts a [Date] to a [DateTime] with the time set to midnight.

impl From<Error<&[u8]>> for Error<Vec<u8>>

Available on crate feature alloc only.

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impl From<Error<&str>> for Error<String>

impl From<File> for OwnedFd

impl From<Language> for LanguageIdentifier

§Examples

use icu::locale::{langid, subtags::language, LanguageIdentifier};

assert_eq!(LanguageIdentifier::from(language!("en")), langid!("en"));

§

impl From<Language> for Locale

§Examples

use icu::locale::Locale;
use icu::locale::{locale, subtags::language};

assert_eq!(Locale::from(language!("en")), locale!("en"));

§Examples

use icu::locale::{langid, subtags::region, LanguageIdentifier};

assert_eq!(
    LanguageIdentifier::from(Some(region!("US"))),
    langid!("und-US")
);

§

impl From<Option<Region>> for Locale

§Examples

use icu::locale::Locale;
use icu::locale::{locale, subtags::region};

assert_eq!(Locale::from(Some(region!("US"))), locale!("und-US"));

§

impl From<Option<Script>> for LanguageIdentifier

§Examples

use icu::locale::{langid, subtags::script, LanguageIdentifier};

assert_eq!(
    LanguageIdentifier::from(Some(script!("latn"))),
    langid!("und-Latn")
);

§

impl From<Option<Script>> for Locale

§Examples

use icu::locale::Locale;
use icu::locale::{locale, subtags::script};

assert_eq!(Locale::from(Some(script!("latn"))), locale!("und-Latn"));

Available on crate feature alloc only.

1.74.0 · Source§

impl From<OwnedFd> for ChildStderr

Creates a ChildStderr from the provided OwnedFd.

The provided file descriptor must point to a pipe with the CLOEXEC flag set.

1.74.0 · Source§

impl From<OwnedFd> for ChildStdin

Creates a ChildStdin from the provided OwnedFd.

The provided file descriptor must point to a pipe with the CLOEXEC flag set.

1.74.0 · Source§

impl From<OwnedFd> for ChildStdout

Creates a ChildStdout from the provided OwnedFd.

The provided file descriptor must point to a pipe with the CLOEXEC flag set.

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impl From<OwnedFd> for Dir

1.63.0 · Source§

impl From<OwnedFd> for std::fs::File

Available on non-Trusty only.

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impl From<OwnedFd> for PidFd

1.87.0 · Source§

impl From<OwnedFd> for PipeReader

Available on non-Trusty only.

1.87.0 · Source§

impl From<OwnedFd> for PipeWriter

Available on non-Trusty only.

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impl From<OwnedFd> for Receiver

Available on crate feature os-ext only.

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impl From<OwnedFd> for Sender

Available on crate feature os-ext only.

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impl From<OwnedFd> for Socket

1.63.0 · Source§

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impl From<PerMessageDeflateConfig> for rama::http::ws::protocol::PerMessageDeflateConfig

Available on crate feature compression only.

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impl From<PerMessageDeflateConfig> for rama::http::headers::sec_websocket_extensions::PerMessageDeflateConfig

Available on crate feature compression only.

Available on non-Trusty only.

1.87.0 · Source§

impl From<PipeReader> for Stdio

1.87.0 · Source§

impl From<PipeWriter> for OwnedFd

Available on non-Trusty only.

impl From<Rc<[u8]>> for Rc<ByteStr>

Available on non-no_rc only.

Available on crate feature os-ext only.

Available on non-no_global_oom_handling only.

Available on non-no_global_oom_handling only.

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impl From<TcpListener> for OwnedFd

Available on Hermit or Unix or WASI only.

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impl From<TcpListener> for Socket

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impl From<TcpListener> for std::net::tcp::TcpListener

1.63.0 · Source§

impl From<TcpStream> for OwnedFd

Available on non-Trusty only.

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impl From<TcpStream> for OwnedFd

Available on Hermit or Unix or WASI only.

Available on crate feature proc-macro only.

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impl From<TokenStream> for proc_macro::TokenStream

Source §

impl From<TokenStream> for proc_macro2::TokenStream

Available on crate feature proc-macro only.

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impl From<TokenStream> for proc_macro::TokenStream

Available on crate feature proc-macro only.

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impl From<TokenTree> for proc_macro2::TokenStream

1.29.0 · Source§

impl From<TokenTree> for proc_macro::TokenStream

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impl From<UdpSocket> for OwnedFd

Available on Hermit or Unix or WASI only.

impl From<UriParamsDeserializeError> for PathRejection

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impl From<UriTemplateString> for rama::utils::collections::smallvec::alloc::boxed::Box<UriTemplateStr>

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impl From<UriTemplateString> for String

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impl From<Url> for String

impl From<Vec<u8>> for CertificateDer<'_>

Available on crate feature alloc only.

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impl From<Vec<u8>> for CertificateRevocationListDer<'_>

Available on crate feature alloc only.

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impl From<Vec<u8>> for CertificateSigningRequestDer<'_>

Available on crate feature alloc only.

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impl From<Vec<u8>> for Der<'static>

Available on crate feature alloc only.

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impl From<Vec<u8>> for DistinguishedName

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impl From<Vec<u8>> for EchConfigListBytes<'_>

Available on crate feature alloc only.

Available on crate feature alloc only.

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impl From<Vec<u8>> for PrivatePkcs8KeyDer<'_>

Available on crate feature alloc only.

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impl From<Vec<u8>> for PrivateSec1KeyDer<'_>

Available on crate feature alloc only.

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impl From<Vec<u8>> for rama::crypto::dep::rcgen::SerialNumber

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impl From<Vec<u8>> for SharedSecret

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impl From<Vec<u8>> for SubjectPublicKeyInfoDer<'_>

Available on crate feature alloc only.

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impl From<Vec<u8>> for Writer

Source §

impl From<Vec<u32>> for rand::seq::index_::IndexVec

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impl From<Vec<u32>> for IndexVec

Source §

impl From<Vec<u64>> for rand::seq::index_::IndexVec

Available on 64-bit only.

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impl From<Vec<u64>> for IndexVec

Available on 64-bit only.

impl From<char> for Literal

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impl From<char> for PotentialCodePoint

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impl From<char> for StrContextValue

1.46.0 · Source§

impl From<char> for String

impl From<u8> for char

Maps a byte in 0x00..=0xFF to a char whose code point has the same value from U+0000 to U+00FF (inclusive).

Unicode is designed such that this effectively decodes bytes with the character encoding that IANA calls ISO-8859-1. This encoding is compatible with ASCII.

Note that this is different from ISO/IEC 8859-1 a.k.a. ISO 8859-1 (with one less hyphen), which leaves some “blanks”, byte values that are not assigned to any character. ISO-8859-1 (the IANA one) assigns them to the C0 and C1 control codes.

Note that this is also different from Windows-1252 a.k.a. code page 1252, which is a superset ISO/IEC 8859-1 that assigns some (not all!) blanks to punctuation and various Latin characters.

To confuse things further, on the Web ascii, iso-8859-1, and windows-1252 are all aliases for a superset of Windows-1252 that fills the remaining blanks with corresponding C0 and C1 control codes.

impl<'a, 'b> From<Cow<'b, str>> for rama::utils::collections::smallvec::alloc::boxed::Box<dyn Error + 'a>

Available on non-no_global_oom_handling only.

1.22.0 · Source§

impl<'a, 'b> From<Cow<'b, str>> for rama::utils::collections::smallvec::alloc::boxed::Box<dyn Error + Sync + Send + 'a>

Available on non-no_global_oom_handling only.

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impl<'a, A> From<&'a [<A as Array>::Item]> for SmallVec<A>
where A: Array, <A as Array>::Item: Clone,

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impl<'a, A> From<&'a [u8]> for NibbleVec<A>
where A: Array<Item = u8>,

1.45.0 · Source§

impl<'a, B> From<Cow<'a, B>> for Arc<B>
where B: ToOwned + ?Sized, Arc<B>: From<&'a B> + From<<B as ToOwned>::Owned>,

1.45.0 · Source§

impl<'a, B> From<Cow<'a, B>> for Rc<B>
where B: ToOwned + ?Sized, Rc<B>: From<&'a B> + From<<B as ToOwned>::Owned>,

1.0.0 · Source§

impl<'a, E> From<E> for rama::utils::collections::smallvec::alloc::boxed::Box<dyn Error + 'a>
where E: Error + 'a,

Available on non-no_global_oom_handling only.

1.0.0 · Source§

impl<'a, E> From<E> for rama::utils::collections::smallvec::alloc::boxed::Box<dyn Error + Sync + Send + 'a>
where E: Error + Send + Sync + 'a,

Available on non-no_global_oom_handling only.

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impl<'a, S> From<&'a RiReferenceStr<S>> for Cow<'a, RiReferenceStr<S>>
where S: Spec,

Available on crate feature alloc only.

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impl<'a, S> From<&'a RiReferenceStr<S>> for MappedToUri<'a, RiReferenceStr<S>>
where S: Spec,

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impl<'a, S> From<&'a RiReferenceString<S>> for MappedToUri<'a, RiReferenceStr<S>>
where S: Spec,

Available on crate feature alloc only.

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impl<'a, S> From<&'a RiRelativeStr<S>> for &'a RiReferenceStr<S>
where S: Spec,

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impl<'a, S> From<&'a RiStr<S>> for Builder<'a>
where S: Spec,

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impl<'a, S> From<&'a RiStr<S>> for Cow<'a, RiStr<S>>
where S: Spec,

Available on crate feature alloc only.

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impl<'a, S> From<&'a RiStr<S>> for MappedToUri<'a, RiStr<S>>
where S: Spec,

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impl<'a, S> From<&'a RiString<S>> for MappedToUri<'a, RiStr<S>>
where S: Spec,

Available on crate feature alloc only.

impl<'a> From<&'a String> for PortBuilder<'a>

Available on crate feature alloc only.

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impl<'a> From<&'a String> for UniCase<&'a str>

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impl<'a> From<&'a String> for UserinfoBuilder<'a>

Available on crate feature alloc only.

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impl<'a> From<&'a Substr> for Cow<'a, str>

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impl<'a> From<&'a UninterpretedHost> for UninterpretedHostRef<'a>

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impl<'a> From<&'a UriTemplateStr> for &'a str

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impl<'a> From<&'a UriTemplateStr> for Cow<'a, UriTemplateStr>

Available on crate feature alloc only.

impl<'a> From<&'a str> for Cow<'a, str>

Available on non-no_global_oom_handling only.

Available on non-no_global_oom_handling only.

1.0.0 · Source§

impl<'a> From<&str> for rama::utils::collections::smallvec::alloc::boxed::Box<dyn Error + Sync + Send + 'a>

Available on non-no_global_oom_handling only.

impl<'a> From<Cow<'a, str>> for String

Available on non-no_global_oom_handling only.

impl<'a> From<OsString> for Cow<'a, OsStr>

1.6.0 · Source§

impl<'a> From<PathBuf> for Cow<'a, Path>

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impl<'a> From<PercentDecode<'a>> for Cow<'a, [u8]>

Available on crate feature alloc only.

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impl<'a> From<PercentEncode<'a>> for Cow<'a, str>

Available on crate feature alloc only.

Available on non-no_global_oom_handling only.

1.0.0 · Source§

impl<'a> From<String> for rama::utils::collections::smallvec::alloc::boxed::Box<dyn Error + Sync + Send + 'a>

Available on non-no_global_oom_handling only.

1.0.0 · Source§

impl<'a> From<String> for Cow<'a, str>

Available on non-no_global_oom_handling only.

Creates a new BorrowedBuf from an uninitialized buffer.

Source §

impl<'data> From<&'data mut [u8]> for BorrowedBuf<'data>

Creates a new BorrowedBuf from a fully initialized slice.

Source §

impl<'data> From<BorrowedCursor<'data>> for BorrowedBuf<'data>

Creates a new BorrowedBuf from a cursor.

Use BorrowedCursor::with_unfilled_buf instead for a safer alternative.

Available on non-no_global_oom_handling only.

Available on crate feature default-hasher only.

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impl<K, V, A, const N: usize> From<[(K, V); N]> for HashMap<K, V, RandomState, A>
where K: Eq + Hash, A: Default + Allocator,

Available on crate feature default-hasher only.

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

Source §

impl<L, R> From<Result<R, L>> for Either<L, R>

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

impl<S> From<&RiStr<S>> for RiString<S>
where S: Spec,

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impl<S> From<Ascii<S>> for UniCase<S>

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impl<S> From<Built<'_, RiAbsoluteStr<S>>> for RiAbsoluteString<S>
where S: Spec,

Available on crate feature alloc only.

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impl<S> From<Built<'_, RiReferenceStr<S>>> for RiReferenceString<S>
where S: Spec,

impl<S> From<RiRelativeString<S>> for String
where S: Spec,

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impl<S> From<RiString<S>> for rama::utils::collections::smallvec::alloc::boxed::Box<RiStr<S>>
where S: Spec,

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impl<S> From<RiString<S>> for RiReferenceString<S>
where S: Spec,

Available on crate feature alloc only.

Available on crate feature default-hasher only.

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impl<T, A, const N: usize> From<[T; N]> for HashSet<T, RandomState, A>
where T: Eq + Hash, A: Default + Allocator,

Available on crate feature default-hasher only.

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impl<T, A> From<&[T]> for Box<[T], A>
where T: Copy, A: Allocator + Default,

Available on non-no_global_oom_handling only.

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Available on non-no_global_oom_handling only.

1.5.0 · Source§

impl<T, A> From<Vec<T, A>> for BinaryHeap<T, A>
where T: Ord, A: Allocator,

1.20.0 · Source§

impl<T, A> From<Vec<T, A>> for rama::utils::collections::smallvec::alloc::boxed::Box<[T], A>
where A: Allocator,

Available on non-no_global_oom_handling only.

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impl<T, A> From<Vec<T, A>> for Box<[T], A>
where A: Allocator,

Available on non-no_global_oom_handling only.

1.21.0 · Source§

impl<T, A> From<Vec<T, A>> for Rc<[T], A>
where A: Allocator,

Available on non-no_global_oom_handling only.

impl<T, const N: usize> From<&mut T> for TagNonNull<T, N>

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impl<T, const N: usize> From<&mut T> for TagPtr<T, N>

1.74.0 · Source§

impl<T, const N: usize> From<&mut [T; N]> for rama::http::grpc::protobuf::prost::alloc::vec::Vec<T>
where T: Clone,

Available on non-no_global_oom_handling only.

Available on non-no_global_oom_handling only.

1.56.0 · Source§

impl<T, const N: usize> From<[T; N]> for BTreeSet<T>
where T: Ord,

1.56.0 · Source§

impl<T, const N: usize> From<[T; N]> for BinaryHeap<T>
where T: Ord,

1.45.0 · Source§

impl<T, const N: usize> From<[T; N]> for rama::utils::collections::smallvec::alloc::boxed::Box<[T]>

Available on non-no_global_oom_handling only.

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impl<T, const N: usize> From<[T; N]> for Box<[T]>

Available on non-no_global_oom_handling only.

1.56.0 · Source§

impl<T, const N: usize> From<[T; N]> for rama::crypto::dep::x509_parser::prelude::asn1_rs::nom::lib::std::collections::HashSet<T>
where T: Eq + Hash,

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impl<T, const N: usize> From<[T; N]> for IndexSet<T>
where T: Eq + Hash,

1.56.0 · Source§

impl<T, const N: usize> From<[T; N]> for LinkedList<T>

1.74.0 · Source§

impl<T, const N: usize> From<[T; N]> for Rc<[T]>

Available on non-no_global_oom_handling only.

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impl<T, const N: usize> From<[T; N]> for Simd<T, N>
where T: SimdElement,

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impl<T, const N: usize> From<[T; N]> for serde_json::value::Value
where T: Into<Value>,

1.44.0 · Source§

impl<T, const N: usize> From<[T; N]> for rama::http::grpc::protobuf::prost::alloc::vec::Vec<T>

Available on non-no_global_oom_handling only.

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impl<T, const N: usize> From<[T; N]> for Vec<T>

Available on non-no_global_oom_handling only.

1.56.0 · Source§

impl<T, const N: usize> From<[T; N]> for VecDeque<T>

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impl<T, const N: usize> From<[bool; N]> for Mask<T, N>
where T: MaskElement,

1.34.0 (const: unstable) · Source§

impl<T> From<!> for T

Stability note: This impl does not yet exist, but we are “reserving space” to add it in the future. See rust-lang/rust#64715 for details.

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impl<T> From<&Slice<T>> for rama::utils::collections::smallvec::alloc::boxed::Box<Slice<T>>
where T: Copy,

1.25.0 (const: unstable) · Source§

impl<T> From<&T> for NonNull<T>
where T: ?Sized,

1.0.0 · Source§

impl<T> From<&T> for OsString
where T: AsRef<OsStr> + ?Sized,

1.0.0 · Source§

impl<T> From<&T> for PathBuf
where T: AsRef<OsStr> + ?Sized,

1.21.0 · Source§

impl<T> From<&[T]> for Arc<[T]>
where T: Clone,

Available on non-no_global_oom_handling only.

1.17.0 · Source§

impl<T> From<&[T]> for rama::utils::collections::smallvec::alloc::boxed::Box<[T]>
where T: Clone,

Available on non-no_global_oom_handling only.

1.21.0 · Source§

impl<T> From<&[T]> for Rc<[T]>
where T: Clone,

Available on non-no_global_oom_handling only.

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impl<T> From<&[T]> for serde_json::value::Value
where T: Clone + Into<Value>,

1.0.0 · Source§

impl<T> From<&[T]> for rama::http::grpc::protobuf::prost::alloc::vec::Vec<T>
where T: Clone,

Available on non-no_global_oom_handling only.

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impl<T> From<&[T]> for Vec<T>
where T: Clone,

Available on non-no_global_oom_handling only.

1.25.0 (const: unstable) · Source§

1.71.0 · Source§

impl<T> From<(T₁, T₂, …, Tₙ)> for [T; N]

This trait is implemented for tuples up to twelve items long.

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impl<T> From<*const T> for Atomic<T>

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impl<T> From<*const T> for Shared<'_, T>

1.23.0 (const: unstable) · Source§

impl<T> From<mut T> for core::sync::atomic::Atomic<mut T>

Available on target_has_atomic_load_store=ptr only.

Unpacks attribute key and value into tuple of this two elements. None value element is returned only for [Attr::Empty] variant.

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impl<T> From<Box<T>> for Atomic<T>

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impl<T> From<Box<T>> for Owned<T>

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impl<T> From<Continuable> for Frame<T>

1.45.0 · Source§

impl<T> From<Cow<'_, [T]>> for rama::utils::collections::smallvec::alloc::boxed::Box<[T]>
where T: Clone,

Available on non-no_global_oom_handling only.

impl<T> From<T> for AssertUnwindSafe<T>
where T: UnwindSafe,

If a value’s type is already UnwindSafe, wrapping it in AssertUnwindSafe is never incorrect.

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impl<T> From<T> for Atomic<T>

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impl<T> From<T> for AtomicCell<T>

1.6.0 · Source§

impl<T> From<T> for rama::utils::collections::smallvec::alloc::boxed::Box<T>

Available on non-no_global_oom_handling only.

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impl<T> From<T> for Box<T>

Available on non-no_global_oom_handling only.

Available on non-no_global_oom_handling only.

Source §

impl<T> From<T> for ThinBox<T>

Available on non-no_global_oom_handling only.

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impl<T> From<T> for TraceError
where T: ExportError,

Source §

impl<T> From<T> for UniqueArc<T>

Available on non-no_global_oom_handling only.

Source §

impl<T> From<T> for UniqueRc<T>

Available on non-no_global_oom_handling only.

This trait is implemented for tuples up to twelve items long.

impl<W> From<Arc<W>> for Waker
where W: Wake + Send + Sync + 'static,

Available on target_has_atomic=ptr only.

From

Trait From Copy item path

§Generic Implementations

§When to implement From

§Examples

Required Methods§

fn from(value: T) -> Self

Dyn Compatibility§

Implementors§

impl From<!> for Infallible

impl From<!> for TryFromIntError

impl From<&'static Tls12CipherSuite> for SupportedCipherSuite

impl From<&'static Tls13CipherSuite> for SupportedCipherSuite

impl From<&'static [u8]> for Body

impl From<&'static [u8]> for rama::bytes::Bytes

impl From<&'static [u8]> for FastCgiBody

impl From<&'static [u8]> for Payload

impl From<&'static str> for AnyValue

impl From<&'static str> for Body

impl From<&'static str> for rama::bytes::Bytes

impl From<&'static str> for rama::telemetry::opentelemetry::Key

impl From<&'static str> for NetError

impl From<&'static str> for rama::dns::client::hickory::resolver::net::proto::serialize::txt::ParseError

impl From<&'static str> for ProtoError

impl From<&'static str> for StrContextValue

impl From<&'static str> for StringValue

impl From<&'static str> for TraceError

impl From<&'static str> for rama::telemetry::opentelemetry::Value

impl From<&ApplicationProtocol> for rama::http::grpc::protobuf::prost::alloc::vec::Vec<u8>

impl From<&ArcStr> for ArcStr

impl From<&ArcStr> for Body

impl From<&ArcStr> for Substr

impl From<&BorrowedFormatItem<'_>> for OwnedFormatItem

impl From<&Box<dyn Error + Sync + Send>> for ReplyKind

impl From<&CStr> for Arc<CStr>

impl From<&CStr> for rama::utils::collections::smallvec::alloc::boxed::Box<CStr>

impl From<&CStr> for CString

impl From<&CStr> for Rc<CStr>

impl From<&ChaCha8Rng> for ChaCha8Rng

impl From<&ChaCha12Rng> for ChaCha12Rng

impl From<&ChaCha20Rng> for ChaCha20Rng

impl From<&CurrencyType> for Value

impl From<&Formatter<'_>> for FormatterOptions

impl From<&Handle> for NonNull<Entry>

impl From<&LanguageIdentifier> for (Language, Option<Script>, Option<Region>)

§Examples

impl From<&LanguageIdentifier> for DataLocale

impl From<&LanguageIdentifier> for LocalePreferences

impl From<&Locale> for DataLocale

impl From<&Locale> for LocalePreferences

impl From<&NumberingSystem> for Value

impl From<&Operation> for &'static str

impl From<&OsStr> for Arc<OsStr>

impl From<&OsStr> for rama::utils::collections::smallvec::alloc::boxed::Box<OsStr>

impl From<&OsStr> for Rc<OsStr>

impl From<&Path> for Arc<Path>

impl From<&Path> for rama::utils::collections::smallvec::alloc::boxed::Box<Path>

impl From<&Path> for Rc<Path>

impl From<&PerMessageDeflateConfig> for rama::http::ws::protocol::PerMessageDeflateConfig

impl From<&PerMessageDeflateConfig> for rama::http::headers::sec_websocket_extensions::PerMessageDeflateConfig

impl From<&PublicKey> for rama::crypto::dep::aws_lc_rs::signature::RsaPublicKeyComponents<Vec<u8>>

impl From<&RegionOverride> for Value

impl From<&RegionalSubdivision> for Value

impl From<&Request> for TransportContext

impl From<&RequestContext> for TransportContext

impl From<&Scheme> for rama::net::Protocol

impl From<&ScopedIp> for core::net::ip_addr::IpAddr

impl From<&SmolStr> for ArcStr

impl From<&SocketAddr> for Authority

impl From<&SocketAddr> for HostWithOptPort

impl From<&SocketAddr> for HostWithPort

impl From<&SocketAddr> for NodeId

impl From<&SocketAddr> for SocketAddress

impl From<&SocketAddress> for Authority

impl From<&SocketAddress> for HostWithOptPort

impl From<&SocketAddress> for HostWithPort

impl From<&SocketAddress> for NodeId

impl From<&SocketAddress> for SockAddr

impl From<&SpanContext> for TraceContext

impl From<&String> for ArcStr

Trait From

§When to implement `From`