Struct Layout

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pub struct Layout {
    pub size: Option<u64>,
    pub align: Option<u64>,
    pub discriminant_offset: Option<u64>,
    pub uninhabited: bool,
    pub variant_layouts: Vector<VariantId, VariantLayout>,
}
Expand description

Simplified type layout information.

Does not include information about niches. If the type does not have fully known layout (e.g. it is ?Sized) some of the layout parts are not available.

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§size: Option<u64>

The size of the type in bytes.

§align: Option<u64>

The alignment, in bytes.

§discriminant_offset: Option<u64>

The discriminant’s offset, if any. Only relevant for types with multiple variants.

§uninhabited: bool

Whether the type is uninhabited, i.e. has any valid value at all. Note that uninhabited types can have arbitrary layouts: (u32, !) has space for the u32 and enum E2 { A, B(!), C(i32, !) } may have space for a discriminant.

§variant_layouts: Vector<VariantId, VariantLayout>

Map from VariantId to the corresponding field layouts. Structs are modeled as having exactly one variant, unions as having no variant.

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impl AstVisitable for Layout

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fn drive<V: VisitAst>(&self, v: &mut V) -> ControlFlow<V::Break>

Recursively visit this type with the provided visitor. This calls the visitor’s visit_$any method if it exists, otherwise visit_inner.
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fn drive_mut<V: VisitAstMut>(&mut self, v: &mut V) -> ControlFlow<V::Break>

Recursively visit this type with the provided visitor. This calls the visitor’s visit_$any method if it exists, otherwise visit_inner.
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fn name(&self) -> &'static str

The name of the type, used for debug logging.
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fn dyn_visit<T: AstVisitable>(&self, f: impl FnMut(&T))

Visit all occurrences of that type inside self, in pre-order traversal.
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fn dyn_visit_mut<T: AstVisitable>(&mut self, f: impl FnMut(&mut T))

Visit all occurrences of that type inside self, in pre-order traversal.
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impl Clone for Layout

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fn clone(&self) -> Layout

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 Layout

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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 Default for Layout

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fn default() -> Layout

Returns the “default value” for a type. Read more
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impl<'de> Deserialize<'de> for Layout

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fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>
where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more
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impl<'s, V> Drive<'s, V> for Layout
where V: Visitor + Visit<'s, Vector<VariantId, VariantLayout>>,

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fn drive_inner(&'s self, visitor: &mut V) -> ControlFlow<V::Break>

Call v.visit() on the immediate contents of self.
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impl<'s, V> DriveMut<'s, V> for Layout
where V: Visitor + VisitMut<'s, Vector<VariantId, VariantLayout>>,

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fn drive_inner_mut(&'s mut self, visitor: &mut V) -> ControlFlow<V::Break>

Call v.visit() on the immediate contents of self.
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impl PartialEq for Layout

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fn eq(&self, other: &Layout) -> bool

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl Serialize for Layout

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fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>
where __S: Serializer,

Serialize this value into the given Serde serializer. Read more
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impl Eq for Layout

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impl StructuralPartialEq for Layout

Auto Trait Implementations§

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impl Freeze for Layout

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impl RefUnwindSafe for Layout

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impl Send for Layout

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impl Sync for Layout

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impl Unpin for Layout

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impl UnwindSafe for Layout

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<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more
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impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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fn equivalent(&self, key: &K) -> bool

Compare self to key and return true if they are equal.
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impl<I, T> ExtractContext<I, ()> for T

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fn extract_context(self, _original_input: I)

Given the context attached to a nom error, and given the original input to the nom parser, extract more the useful context information. 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> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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impl<I> RecreateContext<I> for I

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fn recreate_context(_original_input: I, tail: I) -> I

Given the original input, as well as the context reported by nom, recreate a context in the original string where the error occurred. Read more
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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.
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impl<T> TyVisitable for T
where T: AstVisitable,

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fn substitute(self, generics: &GenericArgs) -> Self

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fn substitute_with_self( self, generics: &GenericArgs, self_ref: &TraitRefKind, ) -> Self

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fn move_under_binder(self) -> Self

Move under one binder.
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fn move_under_binders(self, depth: DeBruijnId) -> Self

Move under depth binders.
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fn move_from_under_binder(self) -> Option<Self>

Move from under one binder.
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fn move_from_under_binders(self, depth: DeBruijnId) -> Option<Self>

Move the value out of depth binders. Returns None if it contains a variable bound in one of these depth binders.
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fn visit_db_id<B>( &mut self, f: impl FnMut(&mut DeBruijnId) -> ControlFlow<B>, ) -> ControlFlow<B>

Visit the de Bruijn ids contained in self, as seen from the outside of self. This means that any variable bound inside self will be skipped, and all the seen indices will count from the outside of self.
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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
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impl<T> DeserializeOwned for T
where T: for<'de> Deserialize<'de>,