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Fst

ftui_runtime::lens

Struct Fst 

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pub struct Fst;
Expand description

Lens into the first element of a tuple.

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impl<A: Clone, B: Clone> Lens<(A, B), A> for Fst

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fn view(&self, whole: &(A, B)) -> A

View the focused part.
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fn set(&self, whole: &mut (A, B), part: A)

Set the focused part, mutating the whole in place.
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fn over(&self, whole: &mut S, f: impl FnOnce(A) -> A)
where A: Clone,

Modify the focused part with a function.
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fn then<B, L2: Lens<A, B>>(self, inner: L2) -> Composed<Self, L2, A>
where Self: Sized, A: Clone,

Compose this lens with an inner lens to focus deeper.

Auto Trait Implementations§

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impl Freeze for Fst

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impl RefUnwindSafe for Fst

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impl Send for Fst

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impl Sync for Fst

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impl Unpin for Fst

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impl UnsafeUnpin for Fst

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impl UnwindSafe for Fst

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