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.

Any type that derives PartialEq automatically implements this trait, regardless of whether its type-parameters implement PartialEq.

If a const item contains some type that does not implement this trait, then that type either (1.) does not implement PartialEq (which means the constant will not provide that comparison method, which code generation assumes is available), or (2.) it implements its own version of PartialEq (which we assume does not conform to a structural-equality comparison).

In either of the two scenarios above, we reject usage of such a constant in a pattern match.

See also the structural match RFC, and issue 63438 which motivated migrating from an attribute-based design to this trait.

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 Action

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

impl StructuralPartialEq for EvalResult

impl StructuralPartialEq for CChar

impl StructuralPartialEq for cexpr::token::Kind

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 CoderResult

impl StructuralPartialEq for DecoderResult

impl StructuralPartialEq for EncoderResult

impl StructuralPartialEq for Latin1Bidi

impl StructuralPartialEq for DwarfFileType

impl StructuralPartialEq for Format

impl StructuralPartialEq for SectionId

impl StructuralPartialEq for Vendor

impl StructuralPartialEq for RunTimeEndian

impl StructuralPartialEq for AbbreviationsCacheStrategy

impl StructuralPartialEq for Pointer

impl StructuralPartialEq for gimli::read::Error

impl StructuralPartialEq for IndexSectionId

impl StructuralPartialEq for ColumnType

impl StructuralPartialEq for gimli::read::value::Value

impl StructuralPartialEq for ValueType

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

impl StructuralPartialEq for humantime::date::Error

impl StructuralPartialEq for humantime::duration::Error

impl StructuralPartialEq for TrieResult

impl StructuralPartialEq for TrieType

impl StructuralPartialEq for icu_collections::codepointtrie::error::Error

impl StructuralPartialEq for ExtensionType

impl StructuralPartialEq for ParserError

impl StructuralPartialEq for icu_locid_transform::directionality::Direction

impl StructuralPartialEq for TransformResult

impl StructuralPartialEq for LocaleTransformError

impl StructuralPartialEq for Decomposed

impl StructuralPartialEq for BidiPairingProperties

impl StructuralPartialEq for PropertiesError

impl StructuralPartialEq for GeneralCategory

impl StructuralPartialEq for CheckedBidiPairedBracketType

impl StructuralPartialEq for BufferFormat

impl StructuralPartialEq for DataErrorKind

impl StructuralPartialEq for LocaleFallbackPriority

impl StructuralPartialEq for LocaleFallbackSupplement

impl StructuralPartialEq for DnsLength

impl StructuralPartialEq for ErrorPolicy

impl StructuralPartialEq for Hyphens

impl StructuralPartialEq for ProcessingError

impl StructuralPartialEq for ProcessingSuccess

impl StructuralPartialEq for WalkState

impl StructuralPartialEq for IpAddrRange

impl StructuralPartialEq for IpNet

impl StructuralPartialEq for IpSubnets

impl StructuralPartialEq for itertools::with_position::Position

impl StructuralPartialEq for fsconfig_command

impl StructuralPartialEq for membarrier_cmd

impl StructuralPartialEq for membarrier_cmd_flag

impl StructuralPartialEq for InsertError

impl StructuralPartialEq for matchit::error::MatchError

impl StructuralPartialEq for DataFormat

impl StructuralPartialEq for MZError

impl StructuralPartialEq for MZFlush

Trait StructuralPartialEq