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

Trait Eq

1.0.0 · Source

pub trait Eq: PartialEq { }

Expand description

Trait for comparisons corresponding to equivalence relations.

The primary difference to PartialEq is the additional requirement for reflexivity. A type that implements PartialEq guarantees that for all a, b and c:

symmetric: a == b implies b == a and a != b implies !(a == b)
transitive: a == b and b == c implies a == c

Eq, which builds on top of PartialEq also implies:

reflexive: a == a

This property cannot be checked by the compiler, and therefore Eq is a trait without 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.

Floating point types such as f32 and f64 implement only PartialEq but not Eq because NaN != NaN.

§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 extra 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 {}

Dyn Compatibility§

impl<T> Eq for *mut T
where T: ?Sized,

Pointer equality is an equivalence relation.

1.0.0 · Source§

impl<T> Eq for [T]
where T: Eq,

1.0.0 · Source§

impl<T> Eq for (T₁, T₂, …, Tₙ)
where T: Eq,

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

§

Trait EqCopy item path

§Derivable

§How can I implement Eq?

Dyn Compatibility§

Implementors§

impl Eq for ForwardKind

impl Eq for LookupIpStrategy

impl Eq for ResolveHosts

impl Eq for ServerOrderingStrategy

impl Eq for rama::futures::io::ErrorKind

impl Eq for SeekFrom

impl Eq for PollNext

impl Eq for EmptyLineHandling

impl Eq for rama::http::headers::encoding::Encoding

impl Eq for After

impl Eq for ClientHint

impl Eq for Extension

impl Eq for PerMessageDeflateIdentifier

impl Eq for rama::http::layer::compression::CompressionLevel

impl Eq for ContentEncoding

impl Eq for HttpVersion

impl Eq for WriterMode

impl Eq for PseudoHeader

impl Eq for EarlyFrame

impl Eq for rama::http::proto::h2::frame::Error

impl Eq for rama::http::proto::h2::frame::Kind

impl Eq for SettingId

impl Eq for DecoderError

impl Eq for NeedMore

impl Eq for DirectoryServeMode

impl Eq for ElementPatchMode

impl Eq for EventType

impl Eq for CrossOriginKind

impl Eq for rama::http::sse::datastar::execute_script::ReferrerPolicy

impl Eq for ScriptAttribute

impl Eq for ScriptType

impl Eq for rama::http::ws::Message

impl Eq for Role

impl Eq for CloseCode

impl Eq for rama::http::ws::protocol::frame::coding::OpCode

impl Eq for OpCodeControl

impl Eq for OpCodeData

impl Eq for rama::net::address::Host

impl Eq for ConnectIpMode

impl Eq for DnsResolveIpMode

impl Eq for rama::net::socket::opts::Domain

impl Eq for rama::net::socket::opts::Protocol

impl Eq for rama::net::socket::opts::Type

impl Eq for IpAddrRange

impl Eq for IpSubnets

impl Eq for IpNet

impl Eq for ServerVerifyMode

impl Eq for ApplicationProtocol

impl Eq for rama::net::tls::CertificateCompressionAlgorithm

impl Eq for rama::net::tls::CipherSuite

impl Eq for CompressionAlgorithm

impl Eq for DataEncoding

impl Eq for ECPointFormat

impl Eq for ExtensionId

impl Eq for rama::net::tls::ProtocolVersion

impl Eq for rama::net::tls::SignatureScheme

impl Eq for SupportedGroup

impl Eq for ClientVerifyMode

impl Eq for TransportProtocol

impl Eq for ProxyCredential

impl Eq for UserId

impl Eq for MemoryProxyDBInsertErrorKind

impl Eq for MemoryProxyDBQueryErrorKind

impl Eq for rama::proxy::haproxy::protocol::v1::Addresses

impl Eq for BinaryParseError

impl Eq for rama::proxy::haproxy::protocol::v1::ParseError

impl Eq for AddressFamily

impl Eq for rama::proxy::haproxy::protocol::v2::Addresses

impl Eq for rama::proxy::haproxy::protocol::v2::Command

impl Eq for rama::proxy::haproxy::protocol::v2::ParseError

impl Eq for rama::proxy::haproxy::protocol::v2::Protocol

impl Eq for rama::proxy::haproxy::protocol::v2::Type

impl Eq for rama::proxy::haproxy::protocol::v2::Version

impl Eq for AddressType

impl Eq for rama::proxy::socks5::proto::Command

Trait Eq

§How can I implement `Eq`?