Trait StructuralPartialEq

Source

pub trait StructuralPartialEq { }

🔬This is a nightly-only experimental API. (structural_match)

Expand description

Required trait for constants used in pattern matches.

Constants are only allowed as patterns if (a) their type implements PartialEq, and (b) interpreting the value of the constant as a pattern is equivalent to calling PartialEq. This ensures that constants used as patterns cannot expose implementation details in an unexpected way or cause semver hazards.

This trait ensures point (b). Any type that derives PartialEq automatically implements this trait.

Implementing this trait (which is unstable) is a way for type authors to explicitly allow comparing const values of this type; that operation will recursively compare all fields (including private fields), even if that behavior differs from PartialEq. This can make it semver-breaking to add further private fields to a type.

Dyn Compatibility§

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

StructuralPartialEq

Trait StructuralPartialEq Copy item path

Dyn Compatibility§

Implementors§

impl StructuralPartialEq for ()

impl StructuralPartialEq for ASN1_ITEM_st

impl StructuralPartialEq for ASN1_TEMPLATE_st

impl StructuralPartialEq for ATerm

impl StructuralPartialEq for AUTHORITY_KEYID_st

impl StructuralPartialEq for rustmax::core::mem::type_info::Abi

impl StructuralPartialEq for rustmax::bindgen::Abi

impl StructuralPartialEq for Aborted

impl StructuralPartialEq for Access

impl StructuralPartialEq for AccessError

impl StructuralPartialEq for AccessFlags

impl StructuralPartialEq for AccessKind

impl StructuralPartialEq for AccessMode

impl StructuralPartialEq for anstyle_parse::state::definitions::Action

impl StructuralPartialEq for bzip2::mem::Action

impl StructuralPartialEq for Adam7Info

impl StructuralPartialEq for Adam7Variant

impl StructuralPartialEq for AdditionError

impl StructuralPartialEq for rustmax::core::net::AddrParseError

impl StructuralPartialEq for ipnet::parser::AddrParseError

impl StructuralPartialEq for rustls_pki_types::server_name::AddrParseError

impl StructuralPartialEq for Advice

impl StructuralPartialEq for AesMode

impl StructuralPartialEq for AesSalt

impl StructuralPartialEq for AhoCorasickKind

impl StructuralPartialEq for AlertDescription

impl StructuralPartialEq for AlertType

impl StructuralPartialEq for aws_lc_rs::agreement::Algorithm

impl StructuralPartialEq for aws_lc_rs::cmac::Algorithm

impl StructuralPartialEq for aws_lc_rs::hkdf::Algorithm

impl StructuralPartialEq for aws_lc_rs::hmac::Algorithm

impl StructuralPartialEq for aws_lc_rs::pbkdf2::Algorithm

impl StructuralPartialEq for aws_lc_rs::cipher::Algorithm

impl StructuralPartialEq for aws_lc_rs::cipher::AlgorithmId

impl StructuralPartialEq for aws_lc_rs::kem::AlgorithmId

impl StructuralPartialEq for AlgorithmIdentifier

impl StructuralPartialEq for AliasVariation

impl StructuralPartialEq for rustmax::core::mem::Alignment

impl StructuralPartialEq for rustmax::core::fmt::Alignment

impl StructuralPartialEq for console::utils::Alignment

impl StructuralPartialEq for AllocErr

impl StructuralPartialEq for rustmax::core::alloc::AllocError

impl StructuralPartialEq for zerocopy::error::AllocError

impl StructuralPartialEq for AlphaColorMode

impl StructuralPartialEq for base64::alphabet::Alphabet

impl StructuralPartialEq for rustmax::base64::alphabet::Alphabet

impl StructuralPartialEq for Alternation

impl StructuralPartialEq for rustmax::jiff::tz::AmbiguousOffset

impl StructuralPartialEq for rustmax::jiff::__jcore::tz::AmbiguousOffset

impl StructuralPartialEq for rustmax::jiff::tz::AmbiguousTimestamp

impl StructuralPartialEq for rustmax::jiff::__jcore::tz::AmbiguousTimestamp

impl StructuralPartialEq for AmbiguousZoned

impl StructuralPartialEq for Anchor

impl StructuralPartialEq for regex_automata::util::search::Anchored

impl StructuralPartialEq for aho_corasick::util::search::Anchored

impl StructuralPartialEq for Ansi256Color

impl StructuralPartialEq for AnsiColor

impl StructuralPartialEq for AnyDelimiterCodec

impl StructuralPartialEq for AnyExtension

impl StructuralPartialEq for ArchiveOffset

impl StructuralPartialEq for ArgCursor

impl StructuralPartialEq for ArgGroup

impl StructuralPartialEq for ArgMatches

impl StructuralPartialEq for ArgPredicate

impl StructuralPartialEq for AsciiChar

impl StructuralPartialEq for AsciiDenyList

impl StructuralPartialEq for AsciiParser

impl StructuralPartialEq for AsciiProbeResult

impl StructuralPartialEq for AsciiSet

impl StructuralPartialEq for Assertion

impl StructuralPartialEq for AssertionKind

impl StructuralPartialEq for Assume

impl StructuralPartialEq for regex_syntax::ast::Ast

impl StructuralPartialEq for rustmax::comrak::nodes::Ast

impl StructuralPartialEq for At

impl StructuralPartialEq for nix::fcntl::AtFlags

Trait StructuralPartialEq