Struct AnyView 

pub struct AnyView(/* private fields */);

A type-erased wrapper for a View.

This allows storing and passing around different view types uniformly.

Implementations

impl AnyView

pub fn new<V>(view: V) -> AnyView

where V: View,

Creates a new AnyView from any type that implements View.

If the provided view is already an AnyView, it will be unwrapped to avoid unnecessary nesting.

pub fn is<T>(&self) -> bool

where T: 'static,

Checks if the contained view is of type T.

pub fn type_id(&self) -> TypeId

Returns the TypeId of the contained view.

pub fn name(&self) -> &'static str

Returns the type name of the contained view.

pub fn stretch_axis(&self) -> StretchAxis

Returns the stretch axis of the contained view.

This delegates to the View::stretch_axis() method of the wrapped view, which for native views returns their layout stretch behavior.

pub unsafe fn downcast_unchecked<T>(self) -> Box<T>

where T: 'static,

Downcasts AnyView to a concrete view type without any runtime checks.

Safety

Calling this method with the incorrect type is undefined behavior.

pub const unsafe fn downcast_ref_unchecked<T>(&self) -> &T

where T: 'static,

Returns a reference to the contained view without any runtime checks.

Safety

Calling this method with the incorrect type is undefined behavior.

pub const unsafe fn downcast_mut_unchecked<T>(&mut self) -> &mut T

where T: 'static,

Returns a mutable reference to the contained view without any runtime checks.

Safety

Calling this method with the incorrect type is undefined behavior.

pub fn downcast<T>(self) -> Result<Box<T>, AnyView>

where T: 'static,

Attempts to downcast AnyView to a concrete view type.

Returns Ok with the boxed value if the types match, or Err with the original AnyView if the types don’t match.

Errors

Returns Err(Self) if the contained type does not match T.

pub fn downcast_ref<T>(&self) -> Option<&T>

where T: 'static,

Attempts to get a reference to the contained view of a specific type.

Returns Some if the types match, or None if they don’t.

pub fn downcast_mut<T>(&mut self) -> Option<&mut T>

where T: 'static,

Attempts to get a mutable reference to the contained view of a specific type.

Returns Some if the types match, or None if they don’t.

Trait Implementations

impl Debug for AnyView

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Default for AnyView

fn default() -> AnyView

Returns the “default value” for a type.

impl View for AnyView

fn body(self, env: &Environment) -> impl View

Build this view and return the content.