Trait kvarn::prelude::utils::prelude::compact_str::core::prelude::rust_2024::Eq

1.0.0 · source ·

pub trait Eq: PartialEq { }

Available on non-crate feature miri-test-libstd 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 kvarn::prelude::utils::prelude::compact_str::core::prelude::rust_2024::Eq

§Derivable

§How can I implement Eq?

Object Safety§

Implementors§

impl Eq for CachePreferenceError

impl Eq for ClientCachePreference

impl Eq for CompressPreference

impl Eq for PreferredCompression

impl Eq for ServerCachePreference

impl Eq for UriKey

impl Eq for Value

impl Eq for BindIpVersion

impl Eq for CacheAction

impl Eq for Action

impl Eq for kvarn::prelude::IpAddr

impl Eq for SocketAddr

impl Eq for CacheControlError

impl Eq for RequestParseStage

impl Eq for SanitizeError

impl Eq for kvarn::prelude::utils::prelude::fmt::Alignment

impl Eq for kvarn::prelude::utils::prelude::io::ErrorKind

impl Eq for SeekFrom

impl Eq for Ipv6MulticastScope

impl Eq for Shutdown

impl Eq for AsciiChar

impl Eq for kvarn::prelude::utils::prelude::compact_str::core::cmp::Ordering

impl Eq for Infallible

impl Eq for FpCategory

impl Eq for IntErrorKind

impl Eq for SearchStep

impl Eq for kvarn::prelude::utils::prelude::compact_str::core::sync::atomic::Ordering

impl Eq for TryReserveErrorKind

impl Eq for BacktraceStatus

impl Eq for VarError

impl Eq for BacktraceStyle

impl Eq for std::sync::mpsc::RecvTimeoutError

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

impl Eq for ParseAlphabetError

impl Eq for base64::decode::DecodeError

impl Eq for DecodeSliceError

impl Eq for EncodeSliceError

impl Eq for DecodePaddingMode

impl Eq for BrotliEncoderMode

impl Eq for CodeBlockState

impl Eq for BrotliEncoderOperation

impl Eq for BrotliEncoderStreamState

impl Eq for BrotliEncoderParameter

impl Eq for FlushCompress

impl Eq for FlushDecompress

impl Eq for Status

impl Eq for PollNext

impl Eq for ErrorLevel

impl Eq for kvarn_quinn::connection::SendDatagramError

impl Eq for kvarn_quinn::recv_stream::ReadError

impl Eq for ReadExactError

impl Eq for ReadToEndError

impl Eq for StoppedError

impl Eq for kvarn_quinn::send_stream::WriteError

impl Eq for log::Level

impl Eq for log::LevelFilter

impl Eq for RemovalCause

impl Eq for Sign

impl Eq for petgraph::dot::Config

impl Eq for Direction

impl Eq for BernoulliError

impl Eq for WeightedError

impl Eq for rustls::client::client_conn::ServerName

impl Eq for rustls::enums::AlertDescription

impl Eq for rustls::enums::AlertDescription

impl Eq for rustls::enums::CipherSuite

impl Eq for rustls::enums::CipherSuite

impl Eq for rustls::enums::ContentType

impl Eq for rustls::enums::ContentType

impl Eq for rustls::enums::HandshakeType

impl Eq for rustls::enums::HandshakeType

impl Eq for rustls::enums::ProtocolVersion

impl Eq for rustls::enums::ProtocolVersion

impl Eq for rustls::enums::SignatureAlgorithm

impl Eq for rustls::enums::SignatureAlgorithm

§How can I implement `Eq`?