Trait IsEmpty 

pub trait IsEmpty {
    // Required method
    fn is_empty(&self) -> bool;
}

表示应用此细化不会产生任何效果的特征

Required Methods

fn is_empty(&self) -> bool

如果应用此细化不会产生任何效果，则返回 true

Dyn Compatibility

This trait is dyn compatible.

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

Implementors

impl IsEmpty for GridTemplateRefinement

where Option<u16>: Clone, Option<TemplateColumnMinSize>: Clone,

impl IsEmpty for StrikethroughStyleRefinement

where Option<Pixels>: Clone, Option<Hsla>: Clone,

impl IsEmpty for StyleRefinement

where Option<Display>: Clone, Option<Visibility>: Clone, PointRefinement<Overflow>: Clone, Option<AbsoluteLength>: Clone, Option<bool>: Clone, Option<Position>: Clone, EdgesRefinement<Length>: Clone, SizeRefinement<Length>: Clone, Option<f32>: Clone, EdgesRefinement<DefiniteLength>: Clone, EdgesRefinement<AbsoluteLength>: Clone, Option<AlignItems>: Clone, Option<AlignSelf>: Clone, Option<AlignContent>: Clone, Option<JustifyContent>: Clone, SizeRefinement<DefiniteLength>: Clone, Option<FlexDirection>: Clone, Option<FlexWrap>: Clone, Option<Length>: Clone, Option<Fill>: Clone, Option<Hsla>: Clone, Option<BorderStyle>: Clone, CornersRefinement<AbsoluteLength>: Clone, Option<Vec<BoxShadow>>: Clone, TextStyleRefinement: Clone, Option<CursorStyle>: Clone, Option<BlendMode>: Clone, Option<Point<f32>>: Clone, Option<GridTemplate>: Clone, Option<GridLocation>: Clone,

impl IsEmpty for TextStyleRefinement

where Option<Hsla>: Clone, Option<SharedString>: Clone, Option<FontFeatures>: Clone, Option<FontFallbacks>: Clone, Option<AbsoluteLength>: Clone, Option<DefiniteLength>: Clone, Option<FontWeight>: Clone, Option<FontStyle>: Clone, Option<UnderlineStyle>: Clone, Option<StrikethroughStyle>: Clone, Option<WhiteSpace>: Clone, Option<TextOverflow>: Clone, Option<TextAlign>: Clone, Option<usize>: Clone,

impl IsEmpty for UnderlineStyleRefinement

where Option<Pixels>: Clone, Option<Hsla>: Clone, Option<bool>: Clone,

impl<T: Clone + Debug + Default + PartialEq> IsEmpty for BoundsRefinement<T>

where Option<Point<T>>: Clone, Option<Size<T>>: Clone,

impl<T: Clone + Debug + Default + PartialEq> IsEmpty for CornersRefinement<T>

where Option<T>: Clone,

impl<T: Clone + Debug + Default + PartialEq> IsEmpty for EdgesRefinement<T>

where Option<T>: Clone,

impl<T: Clone + Debug + Default + PartialEq> IsEmpty for PointRefinement<T>

where Option<T>: Clone,

impl<T: Clone + Debug + Default + PartialEq> IsEmpty for SizeRefinement<T>

where Option<T>: Clone,