const_panic::fmt

Struct IsPanicFmt

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pub struct IsPanicFmt<S: ?Sized, T: ?Sized, K> { /* private fields */ }
Expand description

A marker type that proves that S implements PanicFmt<This = T, Kind = K>.

Used by const_panic macros to coerce both standard library and user-defined types into some type that has a to_panicvals method.

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impl<T: PanicFmt + ?Sized> IsPanicFmt<T, T::This, T::Kind>

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pub const NEW: Self

Constucts an IsPanicFmt

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impl<S: ?Sized, T: ?Sized, K> IsPanicFmt<S, T, K>

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pub const fn infer(self, _: &S) -> Self

Infers the S type parameter with the argument.

Because the only ways to construct IsPanicFmt use IsPanicFmt<S, S::This, S::Kind>, the other type parameters are inferred along with S.

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pub const fn coerce<'a>(self, x: &'a T) -> CoerceReturnOutput<&'a T, K>
where <K as Identity>::Type: CoerceReturn<&'a T>,

For coercing &T to StdWrapper<&T>.

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impl<S: ?Sized, T: ?Sized, K> Clone for IsPanicFmt<S, T, K>

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fn clone(&self) -> Self

Returns a duplicate of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<S: ?Sized, T: ?Sized, K> Copy for IsPanicFmt<S, T, K>

Auto Trait Implementations§

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impl<S, T, K> Freeze for IsPanicFmt<S, T, K>
where S: ?Sized, T: ?Sized,

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impl<S, T, K> RefUnwindSafe for IsPanicFmt<S, T, K>
where S: ?Sized, T: ?Sized,

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impl<S, T, K> Send for IsPanicFmt<S, T, K>
where S: ?Sized, T: ?Sized,

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impl<S, T, K> Sync for IsPanicFmt<S, T, K>
where S: ?Sized, T: ?Sized,

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impl<S, T, K> Unpin for IsPanicFmt<S, T, K>
where S: ?Sized, T: ?Sized,

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impl<S, T, K> UnwindSafe for IsPanicFmt<S, T, K>
where S: ?Sized, T: ?Sized,

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> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. 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, W> HasTypeWitness<W> for T
where W: MakeTypeWitness<Arg = T>, T: ?Sized,

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const WITNESS: W = W::MAKE

A constant of the type witness
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impl<T> Identity for T
where T: ?Sized,

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const TYPE_EQ: TypeEq<T, <T as Identity>::Type> = TypeEq::NEW

Proof that Self is the same type as Self::Type, provides methods for casting between Self and Self::Type.
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type Type = T

The same type as Self, used to emulate type equality bounds (T == U) with associated type equality constraints (T: Identity<Type = U>).
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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.