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.
Fields§
§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.
Trait Implementations§
Source§impl AstVisitable for Layout
impl AstVisitable for Layout
Source§fn drive<V: VisitAst>(&self, v: &mut V) -> ControlFlow<V::Break>
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_$any
method if it exists, otherwise visit_inner
.Source§fn drive_mut<V: VisitAstMut>(&mut self, v: &mut V) -> ControlFlow<V::Break>
fn drive_mut<V: VisitAstMut>(&mut self, v: &mut V) -> ControlFlow<V::Break>
Recursively visit this type with the provided visitor. This calls the visitor’s
visit_$any
method if it exists, otherwise visit_inner
.Source§fn dyn_visit<T: AstVisitable>(&self, f: impl FnMut(&T))
fn dyn_visit<T: AstVisitable>(&self, f: impl FnMut(&T))
Visit all occurrences of that type inside
self
, in pre-order traversal.Source§fn dyn_visit_mut<T: AstVisitable>(&mut self, f: impl FnMut(&mut T))
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.Source§impl<'de> Deserialize<'de> for Layout
impl<'de> Deserialize<'de> for Layout
Source§fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>where
__D: Deserializer<'de>,
fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>where
__D: Deserializer<'de>,
Deserialize this value from the given Serde deserializer. Read more
Source§impl<'s, V> Drive<'s, V> for Layout
impl<'s, V> Drive<'s, V> for Layout
Source§fn drive_inner(&'s self, visitor: &mut V) -> ControlFlow<V::Break>
fn drive_inner(&'s self, visitor: &mut V) -> ControlFlow<V::Break>
Call
v.visit()
on the immediate contents of self
.Source§impl<'s, V> DriveMut<'s, V> for Layout
impl<'s, V> DriveMut<'s, V> for Layout
Source§fn drive_inner_mut(&'s mut self, visitor: &mut V) -> ControlFlow<V::Break>
fn drive_inner_mut(&'s mut self, visitor: &mut V) -> ControlFlow<V::Break>
Call
v.visit()
on the immediate contents of self
.impl Eq for Layout
impl StructuralPartialEq for Layout
Auto Trait Implementations§
impl Freeze for Layout
impl RefUnwindSafe for Layout
impl Send for Layout
impl Sync for Layout
impl Unpin for Layout
impl UnwindSafe for Layout
Blanket Implementations§
Source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
Source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
Source§impl<T> CloneToUninit for Twhere
T: Clone,
impl<T> CloneToUninit for Twhere
T: Clone,
§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
Checks if this value is equivalent to the given key. Read more
§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
Compare self to
key
and return true
if they are equal.§impl<I, T> ExtractContext<I, ()> for T
impl<I, T> ExtractContext<I, ()> for T
§fn extract_context(self, _original_input: I)
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
§impl<T> Instrument for T
impl<T> Instrument for T
§fn instrument(self, span: Span) -> Instrumented<Self>
fn instrument(self, span: Span) -> Instrumented<Self>
§fn in_current_span(self) -> Instrumented<Self>
fn in_current_span(self) -> Instrumented<Self>
Source§impl<T> IntoEither for T
impl<T> IntoEither for T
Source§fn into_either(self, into_left: bool) -> Either<Self, Self>
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 moreSource§fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
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§impl<I> RecreateContext<I> for I
impl<I> RecreateContext<I> for I
§fn recreate_context(_original_input: I, tail: I) -> I
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
Source§impl<T> TyVisitable for Twhere
T: AstVisitable,
impl<T> TyVisitable for Twhere
T: AstVisitable,
fn substitute(self, generics: &GenericArgs) -> Self
fn substitute_with_self( self, generics: &GenericArgs, self_ref: &TraitRefKind, ) -> Self
Source§fn move_under_binder(self) -> Self
fn move_under_binder(self) -> Self
Move under one binder.
Source§fn move_under_binders(self, depth: DeBruijnId) -> Self
fn move_under_binders(self, depth: DeBruijnId) -> Self
Move under
depth
binders.Source§fn move_from_under_binder(self) -> Option<Self>
fn move_from_under_binder(self) -> Option<Self>
Move from under one binder.
Source§fn move_from_under_binders(self, depth: DeBruijnId) -> Option<Self>
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.Source§fn visit_db_id<B>(
&mut self,
f: impl FnMut(&mut DeBruijnId) -> ControlFlow<B>,
) -> ControlFlow<B>
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.