Trait nostr::prelude::core::cmp::Eq

1.0.0 · source ·

pub trait Eq: PartialEq<Self> { }

Expand description

Trait for equality comparisons which are equivalence relations.

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

reflexive: a == a;
symmetric: a == b implies b == a; and
transitive: a == b and b == c implies a == c.

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

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 {}

Trait nostr::prelude::core::cmp::Eq

Derivable

How can I implement Eq?

Implementors§

impl Eq for nostr::event::id::Error

impl Eq for nostr::event::kind::Kind

impl Eq for ExternalIdentity

impl Eq for HttpMethod

impl Eq for LiveEventMarker

impl Eq for LiveEventStatus

impl Eq for Marker

impl Eq for RelayMetadata

impl Eq for Report

impl Eq for Tag

impl Eq for TagKind

impl Eq for nostr::key::Error

impl Eq for ClientMessage

impl Eq for RelayMessage

impl Eq for nostr::message::subscription::Alphabet

impl Eq for nostr::nips::nip04::Error

impl Eq for nostr::nips::nip06::Error

impl Eq for nostr::nips::nip19::Error

impl Eq for nostr::nips::nip21::Error

impl Eq for Condition

impl Eq for nostr::nips::nip26::Error

impl Eq for ValidationError

impl Eq for nostr::nips::nip46::Message

impl Eq for nostr::nips::nip46::Request

impl Eq for nostr::nips::nip46::Response

impl Eq for BudgetType

impl Eq for nostr::nips::nip47::Method

impl Eq for RequestParams

impl Eq for ResponseResult

impl Eq for nostr::types::channel_id::Error

impl Eq for Entity

impl Eq for nostr::types::url::Error

impl Eq for nostr::prelude::bech32::Error

impl Eq for Variant

impl Eq for Bip34Error

impl Eq for nostr::prelude::blockdata::locktime::Error

impl Eq for OperationError

impl Eq for Class

impl Eq for ClassifyContext

impl Eq for nostr::prelude::blockdata::script::Error

impl Eq for ParseOutPointError

impl Eq for RelativeLockTimeError

impl Eq for AddressType

impl Eq for nostr::prelude::All

impl Eq for Denomination

impl Eq for EcdsaSigError

impl Eq for EcdsaSighashType

impl Eq for Language

impl Eq for LockTime

impl Eq for Network

impl Eq for Origin

impl Eq for Parity

impl Eq for ParseError

impl Eq for SchnorrSigError

impl Eq for SchnorrSighashType

impl Eq for SignOnly

impl Eq for SyntaxViolation

impl Eq for Value

impl Eq for VerifyOnly

impl Eq for nostr::prelude::hashes::Error

impl Eq for nostr::prelude::hashes::hex::Error

impl Eq for AddrV2

impl Eq for NetworkMessage

impl Eq for Inventory

impl Eq for BloomFlags

impl Eq for RejectReason

impl Eq for BernoulliError

impl Eq for WeightedError

impl Eq for nostr::prelude::util::address::Error

impl Eq for nostr::prelude::util::address::Payload

impl Eq for WitnessVersion

impl Eq for ParseAmountError

impl Eq for nostr::prelude::util::base58::Error

impl Eq for ChildNumber

impl Eq for nostr::prelude::util::bip32::Error

impl Eq for nostr::prelude::util::bip152::Error

How can I implement `Eq`?