Enum SizeExprKind 

pub enum SizeExprKind {
    Constant(ConstantExpr),
    FromMetadata(MetadataValue),
    Max(Vec<SizeExpr>),
    Min(Vec<SizeExpr>),
    Plus(SizeExpr, SizeExpr),
    Scale(SizeExpr, ConstantExpr),
    AtLeast(SizeExpr),
    AlignTo {
        base: SizeExpr,
        target_align: SizeExpr,
    },
    IfInhabited {
        ty: Ty,
        then_size: SizeExpr,
        else_size: SizeExpr,
    },
}

Variants

Constant(ConstantExpr)

An arbitrary constant of type usize.

FromMetadata(MetadataValue)

Layout information stored in the pointer metadata to this object.

Max(Vec<SizeExpr>)

Min(Vec<SizeExpr>)

Plus(SizeExpr, SizeExpr)

Scale(SizeExpr, ConstantExpr)

Multiply by a constant.

AtLeast(SizeExpr)

The size is at least the value of this expression.

AlignTo

The next multiple of target_align from base.

Fields

base: SizeExpr

target_align: SizeExpr

IfInhabited

A size expression that depens on whether the given type is inhabited.

Fields

ty: Ty

then_size: SizeExpr

else_size: SizeExpr

Implementations

impl SizeExprKind

pub fn is_constant(&self) -> bool

pub fn is_from_metadata(&self) -> bool

pub fn is_max(&self) -> bool

pub fn is_min(&self) -> bool

pub fn is_plus(&self) -> bool

pub fn is_scale(&self) -> bool

pub fn is_at_least(&self) -> bool

pub fn is_align_to(&self) -> bool

pub fn is_if_inhabited(&self) -> bool

impl SizeExprKind

pub fn as_constant(&self) -> Option<&ConstantExpr>

pub fn as_from_metadata(&self) -> Option<&MetadataValue>

pub fn as_max(&self) -> Option<&Vec<SizeExpr>>

pub fn as_min(&self) -> Option<&Vec<SizeExpr>>

pub fn as_plus(&self) -> Option<(&SizeExpr, &SizeExpr)>

pub fn as_scale(&self) -> Option<(&SizeExpr, &ConstantExpr)>

pub fn as_at_least(&self) -> Option<&SizeExpr>

pub fn as_align_to(&self) -> Option<(&SizeExpr, &SizeExpr)>

pub fn as_if_inhabited(&self) -> Option<(&Ty, &SizeExpr, &SizeExpr)>

impl SizeExprKind

pub fn as_constant_mut(&mut self) -> Option<&mut ConstantExpr>

pub fn as_from_metadata_mut(&mut self) -> Option<&mut MetadataValue>

pub fn as_max_mut(&mut self) -> Option<&mut Vec<SizeExpr>>

pub fn as_min_mut(&mut self) -> Option<&mut Vec<SizeExpr>>

pub fn as_plus_mut(&mut self) -> Option<(&mut SizeExpr, &mut SizeExpr)>

pub fn as_scale_mut(&mut self) -> Option<(&mut SizeExpr, &mut ConstantExpr)>

pub fn as_at_least_mut(&mut self) -> Option<&mut SizeExpr>

pub fn as_align_to_mut(&mut self) -> Option<(&mut SizeExpr, &mut SizeExpr)>

pub fn as_if_inhabited_mut( &mut self, ) -> Option<(&mut Ty, &mut SizeExpr, &mut SizeExpr)>

impl SizeExprKind

pub fn variant_name(&self) -> &'static str

impl SizeExprKind

pub fn zero() -> Self

pub fn from_usize(value: u128) -> Self

pub fn into_expr(self) -> SizeExpr

Trait Implementations

impl AstVisitable for SizeExprKind

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.

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.

fn drive_two<V: ZipAst>(&self, other: &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.

fn name(&self) -> &'static str

The name of the type, used for debug logging.

fn dyn_visit<T: AstVisitable>(&self, f: impl FnMut(&T))

where Self: Sized,

Visit all occurrences of that type inside self, in pre-order traversal.

fn dyn_visit_mut<T: AstVisitable>(&mut self, f: impl FnMut(&mut T))

where Self: Sized,

Visit all occurrences of that type inside self, in pre-order traversal.

impl Clone for SizeExprKind

fn clone(&self) -> SizeExprKind

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for SizeExprKind

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

Formats the value using the given formatter.

impl<'de, __State: ?Sized> DeserializeState<'de, __State> for SizeExprKind

where ConstantExpr: DeserializeState<'de, __State>, MetadataValue: DeserializeState<'de, __State>, Vec<SizeExpr>: DeserializeState<'de, __State>, SizeExpr: DeserializeState<'de, __State>, Ty: DeserializeState<'de, __State>,

fn deserialize_state<__D>( __state: &__State, __deserializer: __D, ) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

impl<'s, V> Drive<'s, V> for SizeExprKind

where V: Visitor + Visit<'s, ConstantExpr> + Visit<'s, MetadataValue> + Visit<'s, Vec<SizeExpr>> + Visit<'s, SizeExpr> + Visit<'s, Ty>,

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

Call v.visit() on the immediate contents of self.

impl<'s, V> DriveMut<'s, V> for SizeExprKind

where V: Visitor + VisitMut<'s, ConstantExpr> + VisitMut<'s, MetadataValue> + VisitMut<'s, Vec<SizeExpr>> + VisitMut<'s, SizeExpr> + VisitMut<'s, Ty>,

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

Call v.visit() on the immediate contents of self.

impl<'s, V> DriveTwo<'s, V> for SizeExprKind

where V: Visitor<Break: Default> + VisitTwo<'s, ConstantExpr> + VisitTwo<'s, MetadataValue> + VisitTwo<'s, Vec<SizeExpr>> + VisitTwo<'s, SizeExpr> + VisitTwo<'s, Ty>,

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

Call v.visit() on the immediate contents of self and other, if they correspond. If the values don’t match up, this returns Break(Default::default()).

impl Eq for SizeExprKind

impl From<SizeExprKind> for SizeExpr

fn from(kind: SizeExprKind) -> Self

Converts to this type from the input type.

impl Hash for SizeExprKind

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for SizeExprKind

fn cmp(&self, other: &SizeExprKind) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for SizeExprKind

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

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl PartialOrd for SizeExprKind

fn partial_cmp(&self, other: &SizeExprKind) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl<__State: ?Sized> SerializeState<__State> for SizeExprKind

where ConstantExpr: SerializeState<__State>, MetadataValue: SerializeState<__State>, Vec<SizeExpr>: SerializeState<__State>, SizeExpr: SerializeState<__State>, Ty: SerializeState<__State>,

fn serialize_state<__S>( &self, __state: &__State, __serializer: __S, ) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

impl StructuralPartialEq for SizeExprKind