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.

Trait StructuralPartialEqCopy item path

Implementors§

impl StructuralPartialEq for AhoCorasickKind

impl StructuralPartialEq for aho_corasick::packed::api::MatchKind

impl StructuralPartialEq for aho_corasick::util::error::MatchErrorKind

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

impl StructuralPartialEq for aho_corasick::util::search::MatchKind

impl StructuralPartialEq for StartKind

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

impl StructuralPartialEq for anstyle_parse::state::definitions::State

impl StructuralPartialEq for TransferFunction

impl StructuralPartialEq for avif_serialize::constants::ColorPrimaries

impl StructuralPartialEq for avif_serialize::constants::MatrixCoefficients

impl StructuralPartialEq for avif_serialize::constants::TransferCharacteristics

impl StructuralPartialEq for TlsProtocolId

impl StructuralPartialEq for ParsedPublicKeyFormat

impl StructuralPartialEq for aws_lc_rs::cipher::AlgorithmId

impl StructuralPartialEq for OperatingMode

impl StructuralPartialEq for KbkdfCtrHmacAlgorithmId

impl StructuralPartialEq for SskdfDigestAlgorithmId

impl StructuralPartialEq for SskdfHmacAlgorithmId

impl StructuralPartialEq for aws_lc_rs::kem::AlgorithmId

impl StructuralPartialEq for BlockCipherId

impl StructuralPartialEq for EncryptionAlgorithmId

impl StructuralPartialEq for KeySize

impl StructuralPartialEq for point_conversion_form_t

impl StructuralPartialEq for HuffmanTreeError

impl StructuralPartialEq for CheckedCastError

impl StructuralPartialEq for PodCastError

impl StructuralPartialEq for byteorder_lite::BigEndian

impl StructuralPartialEq for byteorder_lite::LittleEndian

impl StructuralPartialEq for bzip2::mem::Action

impl StructuralPartialEq for bzip2::mem::Error

impl StructuralPartialEq for bzip2::mem::Status

impl StructuralPartialEq for EvalResult

impl StructuralPartialEq for CChar

impl StructuralPartialEq for Tz

impl StructuralPartialEq for clang_sys::Version

impl StructuralPartialEq for LabelStyle

impl StructuralPartialEq for Severity

impl StructuralPartialEq for colorchoice::ColorChoice

impl StructuralPartialEq for console::kb::Key

impl StructuralPartialEq for TermFamily

impl StructuralPartialEq for console::utils::Alignment

impl StructuralPartialEq for console::utils::Attribute

impl StructuralPartialEq for console::utils::Color

impl StructuralPartialEq for BitOrder

impl StructuralPartialEq for DecodeKind

impl StructuralPartialEq for CoderResult

impl StructuralPartialEq for DecoderResult

impl StructuralPartialEq for EncoderResult

impl StructuralPartialEq for Latin1Bidi

impl StructuralPartialEq for exr::compression::Compression

impl StructuralPartialEq for Blocks

impl StructuralPartialEq for FlatSamples

impl StructuralPartialEq for RoundingMode

impl StructuralPartialEq for AttributeValue

impl StructuralPartialEq for exr::meta::attribute::BlockType

impl StructuralPartialEq for EnvironmentMap

impl StructuralPartialEq for LevelMode

impl StructuralPartialEq for LineOrder

impl StructuralPartialEq for SampleType

impl StructuralPartialEq for BlockDescription

impl StructuralPartialEq for DecompressionError

impl StructuralPartialEq for find_msvc_tools::find_tools::VsVers

impl StructuralPartialEq for gif::common::Block

impl StructuralPartialEq for DisposalMethod

impl StructuralPartialEq for Extension

impl StructuralPartialEq for Repeat

impl StructuralPartialEq for ColorOutput

impl StructuralPartialEq for gif::reader::decoder::Version

impl StructuralPartialEq for globset::ErrorKind

impl StructuralPartialEq for hashbrown::TryReserveError

impl StructuralPartialEq for AdditionError

impl StructuralPartialEq for CreationError

impl StructuralPartialEq for RecordError

impl StructuralPartialEq for SubtractionError

impl StructuralPartialEq for httparse::Error

impl StructuralPartialEq for BaseUnit

impl StructuralPartialEq for Kilo

Trait StructuralPartialEq