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 devela::_dep::_alloc::collections::TryReserveErrorKind

impl StructuralPartialEq for SeekFrom

impl StructuralPartialEq for BacktraceStyle

impl StructuralPartialEq for devela::_dep::allocator_api2::collections::TryReserveErrorKind

impl StructuralPartialEq for CollectionAllocErr

impl StructuralPartialEq for CheckedCastError

impl StructuralPartialEq for PodCastError

impl StructuralPartialEq for SetCursorStyle

impl StructuralPartialEq for devela::_dep::crossterm::event::Event

impl StructuralPartialEq for devela::_dep::crossterm::event::KeyCode

impl StructuralPartialEq for KeyEventKind

impl StructuralPartialEq for MediaKeyCode

impl StructuralPartialEq for ModifierKeyCode

impl StructuralPartialEq for devela::_dep::crossterm::event::MouseButton

impl StructuralPartialEq for MouseEventKind

impl StructuralPartialEq for Attribute

impl StructuralPartialEq for devela::_dep::crossterm::style::Color

impl StructuralPartialEq for Colored

impl StructuralPartialEq for ClearType

impl StructuralPartialEq for devela::_dep::ffmpeg_the_third::codec::encoder::Comparison

impl StructuralPartialEq for Decision

impl StructuralPartialEq for MotionEstimation

impl StructuralPartialEq for Compliance

impl StructuralPartialEq for devela::_dep::ffmpeg_the_third::codec::Id

impl StructuralPartialEq for Profile

impl StructuralPartialEq for devela::_dep::ffmpeg_the_third::codec::packet::side_data::Type

impl StructuralPartialEq for AAC

impl StructuralPartialEq for DTS

impl StructuralPartialEq for H264

impl StructuralPartialEq for HEVC

impl StructuralPartialEq for JPEG2000

impl StructuralPartialEq for MPEG2

impl StructuralPartialEq for MPEG4

impl StructuralPartialEq for VC1

impl StructuralPartialEq for VP9

impl StructuralPartialEq for devela::_dep::ffmpeg_the_third::codec::subtitle::Type

impl StructuralPartialEq for devela::_dep::ffmpeg_the_third::codec::threading::Type

impl StructuralPartialEq for AudioService

impl StructuralPartialEq for devela::_dep::ffmpeg_the_third::Channel

impl StructuralPartialEq for ChannelOrder

impl StructuralPartialEq for Discard

impl StructuralPartialEq for devela::_dep::ffmpeg_the_third::Error

impl StructuralPartialEq for FieldOrder

impl StructuralPartialEq for Rounding

impl StructuralPartialEq for Pixel

impl StructuralPartialEq for Sample

impl StructuralPartialEq for devela::_dep::ffmpeg_the_third::software::resampling::Dither

impl StructuralPartialEq for Engine

impl StructuralPartialEq for Filter

impl StructuralPartialEq for devela::_dep::ffmpeg_the_third::software::scaling::ColorSpace

impl StructuralPartialEq for AVActiveFormatDescription

impl StructuralPartialEq for AVAppToDevMessageType

impl StructuralPartialEq for AVAudioServiceType

impl StructuralPartialEq for AVCRCId

impl StructuralPartialEq for AVChannel

impl StructuralPartialEq for AVChannelOrder

impl StructuralPartialEq for AVChromaLocation

impl StructuralPartialEq for AVClassCategory

impl StructuralPartialEq for AVCodecID

impl StructuralPartialEq for AVColorPrimaries

impl StructuralPartialEq for AVColorRange

impl StructuralPartialEq for AVColorSpace

impl StructuralPartialEq for AVColorTransferCharacteristic

impl StructuralPartialEq for AVDevToAppMessageType

impl StructuralPartialEq for AVDiscard

impl StructuralPartialEq for AVDownmixType

impl StructuralPartialEq for AVDurationEstimationMethod

impl StructuralPartialEq for AVEscapeMode

impl StructuralPartialEq for AVFieldOrder

impl StructuralPartialEq for AVFilterLink__bindgen_ty_1

impl StructuralPartialEq for AVFrameSideDataType

impl StructuralPartialEq for AVHMACType

impl StructuralPartialEq for AVHWDeviceType

impl StructuralPartialEq for AVHWFrameTransferDirection

impl StructuralPartialEq for AVIODataMarkerType

impl StructuralPartialEq for AVIODirEntryType

impl StructuralPartialEq for AVMatrixEncoding

impl StructuralPartialEq for AVMediaType

Trait StructuralPartialEq