# Enum rustc_const_eval::interpret::validity::PathElem

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    pub enum PathElem {
        Field(Symbol),
        Variant(Symbol),
        CoroutineState(VariantIdx),
        CapturedVar(Symbol),
        ArrayElem(usize),
        TupleElem(usize),
        Deref,
        EnumTag,
        CoroutineTag,
        DynDowncast,
    }

Expand description

We want to show a nice path to the invalid field for diagnostics, but avoid string operations in the happy case where no error happens. So we track a `Vec<PathElem>` where `PathElem` contains all the data we need to later print something for the user.

## Variants§

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### Field(Symbol)

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### Variant(Symbol)

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### CoroutineState(VariantIdx)

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### CapturedVar(Symbol)

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### ArrayElem(usize)

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### TupleElem(usize)

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### Deref

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### EnumTag

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### CoroutineTag

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### DynDowncast

## Trait Implementations§

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### impl Clone for PathElem

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#### fn clone(&self) -> PathElem

Returns a copy 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 Debug for PathElem

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

Formats the value using the given formatter. Read more
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### impl Copy for PathElem

## Auto Trait Implementations§

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### impl RefUnwindSafe for PathElem

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### impl Send for PathElem

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### impl Sync for PathElem

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### impl Unpin for PathElem

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### impl UnwindSafe for PathElem

## 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, 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> ToOwned for T
where T: Clone,

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#### type Owned = T

The resulting type after obtaining ownership.
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#### fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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#### fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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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.

## Layout§

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain `repr(...)` attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 16 bytes

Size for each variant:

- `Field`: 4 bytes
- `Variant`: 4 bytes
- `CoroutineState`: 4 bytes
- `CapturedVar`: 4 bytes
- `ArrayElem`: 12 bytes
- `TupleElem`: 12 bytes
- `Deref`: 0 bytes
- `EnumTag`: 0 bytes
- `CoroutineTag`: 0 bytes
- `DynDowncast`: 0 bytes