Trait rocket::mtls::oid::asn1_rs::nom::lib::std::cmp::Eq

1.0.0 · source ·

pub trait Eq: PartialEq { }

Available on crate feature mtls only.

Expand description

Trait for comparisons corresponding to equivalence relations.

This means, that in addition to a == b and a != b being strict inverses, the relation must be (for all a, b and c):

reflexive: a == a;
symmetric: a == b implies b == a (required by PartialEq as well); and
transitive: a == b and b == c implies a == c (required by PartialEq as well).

This property cannot be checked by the compiler, and therefore Eq implies PartialEq, and has no extra methods.

Violating this property is a logic error. The behavior resulting from a logic error is not specified, but users of the trait must ensure that such logic errors do not result in undefined behavior. This means that unsafe code must not rely on the correctness of these methods.

Implement Eq in addition to PartialEq if it’s guaranteed that PartialEq::eq(a, a) always returns true (reflexivity), in addition to the symmetric and transitive properties already required by PartialEq.

§Derivable

This trait can be used with #[derive]. When derived, because Eq has no extra methods, it is only informing the compiler that this is an equivalence relation rather than a partial equivalence relation. Note that the derive strategy requires all fields are Eq, which isn’t always desired.

§How can I implement `Eq`?

If you cannot use the derive strategy, specify that your type implements Eq, which has no methods:

enum BookFormat { Paperback, Hardback, Ebook }
struct Book {
    isbn: i32,
    format: BookFormat,
}
impl PartialEq for Book {
    fn eq(&self, other: &Self) -> bool {
        self.isbn == other.isbn
    }
}
impl Eq for Book {}

Object Safety§

This trait is not object safe.

Trait rocket::mtls::oid::asn1_rs::nom::lib::std::cmp::EqCopy item path

§Derivable

§How can I implement Eq?

Object Safety§

Implementors§

impl Eq for rocket::config::CipherSuite

impl Eq for LogLevel

impl Eq for Sig

impl Eq for Entity

impl Eq for rocket::http::Method

impl Eq for SameSite

impl Eq for StatusClass

impl Eq for PathError

impl Eq for Value

impl Eq for Feature

impl Eq for Sign

impl Eq for Class

impl Eq for Length

impl Eq for ASN1TimeZone

impl Eq for Explicit

impl Eq for Implicit

impl Eq for rocket::mtls::oid::asn1_rs::Needed

impl Eq for rocket::mtls::oid::asn1_rs::nom::error::ErrorKind

impl Eq for rocket::mtls::oid::asn1_rs::nom::number::Endianness

impl Eq for TryReserveErrorKind

impl Eq for Infallible

impl Eq for rocket::mtls::oid::asn1_rs::nom::lib::std::fmt::Alignment

impl Eq for rocket::mtls::oid::asn1_rs::nom::lib::std::str::pattern::SearchStep

impl Eq for rocket::mtls::oid::asn1_rs::nom::lib::std::cmp::Ordering

impl Eq for AsciiChar

impl Eq for core::net::ip_addr::IpAddr

impl Eq for Ipv6MulticastScope

impl Eq for SocketAddr

impl Eq for FpCategory

impl Eq for IntErrorKind

impl Eq for core::sync::atomic::Ordering

impl Eq for BacktraceStatus

impl Eq for VarError

impl Eq for std::io::SeekFrom

impl Eq for std::io::error::ErrorKind

impl Eq for Shutdown

impl Eq for BacktraceStyle

impl Eq for RecvTimeoutError

impl Eq for std::sync::mpsc::TryRecvError

impl Eq for base64::alphabet::ParseAlphabetError

impl Eq for base64::alphabet::ParseAlphabetError

impl Eq for base64::decode::DecodeError

impl Eq for base64::decode::DecodeError

impl Eq for base64::decode::DecodeError

impl Eq for base64::decode::DecodeSliceError

impl Eq for base64::decode::DecodeSliceError

impl Eq for base64::encode::EncodeSliceError

impl Eq for base64::encode::EncodeSliceError

impl Eq for base64::engine::DecodePaddingMode

impl Eq for base64::engine::DecodePaddingMode

impl Eq for BigEndian

impl Eq for LittleEndian

impl Eq for const_oid::error::Error

impl Eq for Expiration

impl Eq for cookie::parse::ParseError

impl Eq for BitOrder

impl Eq for DecodeKind

impl Eq for CoderResult

impl Eq for DecoderResult

impl Eq for EncoderResult

impl Eq for Latin1Bidi

impl Eq for PollNext

impl Eq for hashbrown::TryReserveError

impl Eq for httparse::Error

impl Eq for InlinableString

impl Eq for fsconfig_command

impl Eq for membarrier_cmd

impl Eq for membarrier_cmd_flag

impl Eq for log::Level

impl Eq for log::LevelFilter

impl Eq for multer::error::Error

impl Eq for OnceState

impl Eq for FilterOp

impl Eq for ParkResult

impl Eq for RequeueOp

Trait rocket::mtls::oid::asn1_rs::nom::lib::std::cmp::Eq

§How can I implement `Eq`?