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Message

Struct Message 

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pub struct Message(/* private fields */);
Expand description

A type-erased message container.

Messages can be any type that is Send + 'static. Use Message::new to create a message and Message::downcast to retrieve the original type.

§Example

use bubbletea::Message;

struct MyMsg(i32);

let msg = Message::new(MyMsg(42));
if let Some(my_msg) = msg.downcast::<MyMsg>() {
    assert_eq!(my_msg.0, 42);
}

Implementations§

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impl Message

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pub fn new<M: Any + Send + 'static>(msg: M) -> Self

Create a new message from any sendable type.

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pub fn downcast<M: Any + Send + 'static>(self) -> Option<M>

Try to downcast to a specific message type.

Returns Some(T) if the message is of type T, otherwise None.

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pub fn downcast_ref<M: Any + Send + 'static>(&self) -> Option<&M>

Try to get a reference to the message as a specific type.

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pub fn is<M: Any + Send + 'static>(&self) -> bool

Check if the message is of a specific type.

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impl Debug for Message

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more