Enum rustc::mir::interpret::ConstValue [−][src]
pub enum ConstValue<'tcx> { Unevaluated(DefId, &'tcx Substs<'tcx>), Scalar(Scalar), ScalarPair(Scalar, Scalar), ByRef(&'tcx Allocation, Size), }
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Represents a constant value in Rust. Scalar and ScalarPair are optimizations which matches Value's optimizations for easy conversions between these two types
Variants
Unevaluated(DefId, &'tcx Substs<'tcx>)
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Never returned from the const_eval
query, but the HIR contains these frequently in order
to allow HIR creation to happen for everything before needing to be able to run constant
evaluation
Scalar(Scalar)
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Used only for types with layout::abi::Scalar ABI and ZSTs which use Scalar::undef()
ScalarPair(Scalar, Scalar)
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Used only for types with layout::abi::ScalarPair
ByRef(&'tcx Allocation, Size)
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Used only for the remaining cases. An allocation + offset into the allocation
Methods
impl<'tcx> ConstValue<'tcx>
[src]
impl<'tcx> ConstValue<'tcx>
pub fn from_byval_value(val: Value) -> Self
[src]
pub fn from_byval_value(val: Value) -> Self
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pub fn to_byval_value(&self) -> Option<Value>
[src]
pub fn to_byval_value(&self) -> Option<Value>
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pub fn from_scalar(val: Scalar) -> Self
[src]
pub fn from_scalar(val: Scalar) -> Self
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pub fn to_scalar(&self) -> Option<Scalar>
[src]
pub fn to_scalar(&self) -> Option<Scalar>
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pub fn to_bits(&self, size: Size) -> Option<u128>
[src]
pub fn to_bits(&self, size: Size) -> Option<u128>
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pub fn to_ptr(&self) -> Option<Pointer>
[src]
pub fn to_ptr(&self) -> Option<Pointer>
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Trait Implementations
impl<'a, 'gcx> HashStable<StableHashingContext<'a>> for ConstValue<'gcx>
[src]
impl<'a, 'gcx> HashStable<StableHashingContext<'a>> for ConstValue<'gcx>
fn hash_stable<W: StableHasherResult>(
&self,
hcx: &mut StableHashingContext<'a>,
hasher: &mut StableHasher<W>
)
[src]
fn hash_stable<W: StableHasherResult>(
&self,
hcx: &mut StableHashingContext<'a>,
hasher: &mut StableHasher<W>
)
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impl<'tcx> Copy for ConstValue<'tcx>
[src]
impl<'tcx> Copy for ConstValue<'tcx>
impl<'tcx> Clone for ConstValue<'tcx>
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impl<'tcx> Clone for ConstValue<'tcx>
fn clone(&self) -> ConstValue<'tcx>
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fn clone(&self) -> ConstValue<'tcx>
Returns a copy of the value. Read more
fn clone_from(&mut self, source: &Self)
1.0.0[src]
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from source
. Read more
impl<'tcx> Debug for ConstValue<'tcx>
[src]
impl<'tcx> Debug for ConstValue<'tcx>
fn fmt(&self, f: &mut Formatter) -> Result
[src]
fn fmt(&self, f: &mut Formatter) -> Result
Formats the value using the given formatter. Read more
impl<'tcx> Eq for ConstValue<'tcx>
[src]
impl<'tcx> Eq for ConstValue<'tcx>
fn assert_receiver_is_total_eq(&self)
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fn assert_receiver_is_total_eq(&self)
impl<'tcx> PartialEq for ConstValue<'tcx>
[src]
impl<'tcx> PartialEq for ConstValue<'tcx>
fn eq(&self, other: &ConstValue<'tcx>) -> bool
[src]
fn eq(&self, other: &ConstValue<'tcx>) -> bool
This method tests for self
and other
values to be equal, and is used by ==
. Read more
fn ne(&self, other: &ConstValue<'tcx>) -> bool
[src]
fn ne(&self, other: &ConstValue<'tcx>) -> bool
This method tests for !=
.
impl<'tcx> PartialOrd for ConstValue<'tcx>
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impl<'tcx> PartialOrd for ConstValue<'tcx>
fn partial_cmp(&self, other: &ConstValue<'tcx>) -> Option<Ordering>
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fn partial_cmp(&self, other: &ConstValue<'tcx>) -> Option<Ordering>
This method returns an ordering between self
and other
values if one exists. Read more
fn lt(&self, other: &ConstValue<'tcx>) -> bool
[src]
fn lt(&self, other: &ConstValue<'tcx>) -> bool
This method tests less than (for self
and other
) and is used by the <
operator. Read more
fn le(&self, other: &ConstValue<'tcx>) -> bool
[src]
fn le(&self, other: &ConstValue<'tcx>) -> bool
This method tests less than or equal to (for self
and other
) and is used by the <=
operator. Read more
fn gt(&self, other: &ConstValue<'tcx>) -> bool
[src]
fn gt(&self, other: &ConstValue<'tcx>) -> bool
This method tests greater than (for self
and other
) and is used by the >
operator. Read more
fn ge(&self, other: &ConstValue<'tcx>) -> bool
[src]
fn ge(&self, other: &ConstValue<'tcx>) -> bool
This method tests greater than or equal to (for self
and other
) and is used by the >=
operator. Read more
impl<'tcx> Ord for ConstValue<'tcx>
[src]
impl<'tcx> Ord for ConstValue<'tcx>
fn cmp(&self, other: &ConstValue<'tcx>) -> Ordering
[src]
fn cmp(&self, other: &ConstValue<'tcx>) -> Ordering
This method returns an Ordering
between self
and other
. Read more
fn max(self, other: Self) -> Self
1.21.0[src]
fn max(self, other: Self) -> Self
Compares and returns the maximum of two values. Read more
fn min(self, other: Self) -> Self
1.21.0[src]
fn min(self, other: Self) -> Self
Compares and returns the minimum of two values. Read more
impl<'tcx> Encodable for ConstValue<'tcx>
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impl<'tcx> Encodable for ConstValue<'tcx>
fn encode<__S: Encoder>(&self, s: &mut __S) -> Result<(), __S::Error>
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fn encode<__S: Encoder>(&self, s: &mut __S) -> Result<(), __S::Error>
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impl<'tcx> Decodable for ConstValue<'tcx>
[src]
impl<'tcx> Decodable for ConstValue<'tcx>
fn decode<__D: Decoder>(d: &mut __D) -> Result<ConstValue<'tcx>, __D::Error>
[src]
fn decode<__D: Decoder>(d: &mut __D) -> Result<ConstValue<'tcx>, __D::Error>
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impl<'tcx> Hash for ConstValue<'tcx>
[src]
impl<'tcx> Hash for ConstValue<'tcx>
fn hash<__H: Hasher>(&self, state: &mut __H)
[src]
fn hash<__H: Hasher>(&self, state: &mut __H)
Feeds this value into the given [Hasher
]. Read more
fn hash_slice<H>(data: &[Self], state: &mut H) where
H: Hasher,
1.3.0[src]
fn hash_slice<H>(data: &[Self], state: &mut H) where
H: Hasher,
Feeds a slice of this type into the given [Hasher
]. Read more
impl<'tcx> TypeFoldable<'tcx> for ConstValue<'tcx>
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impl<'tcx> TypeFoldable<'tcx> for ConstValue<'tcx>
fn super_fold_with<'gcx: 'tcx, F: TypeFolder<'gcx, 'tcx>>(
&self,
folder: &mut F
) -> Self
[src]
fn super_fold_with<'gcx: 'tcx, F: TypeFolder<'gcx, 'tcx>>(
&self,
folder: &mut F
) -> Self
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fn super_visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> bool
[src]
fn super_visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> bool
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fn fold_with<'gcx: 'tcx, F: TypeFolder<'gcx, 'tcx>>(
&self,
folder: &mut F
) -> Self
[src]
fn fold_with<'gcx: 'tcx, F: TypeFolder<'gcx, 'tcx>>(
&self,
folder: &mut F
) -> Self
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fn visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> bool
[src]
fn visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> bool
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fn has_regions_bound_at_or_above(&self, binder: DebruijnIndex) -> bool
[src]
fn has_regions_bound_at_or_above(&self, binder: DebruijnIndex) -> bool
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True if self
has any late-bound regions that are either bound by binder
or bound by some binder outside of binder
. If binder
is ty::INNERMOST
, this indicates whether there are any late-bound regions that appear free. Read more
fn has_regions_bound_above(&self, binder: DebruijnIndex) -> bool
[src]
fn has_regions_bound_above(&self, binder: DebruijnIndex) -> bool
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True if this self
has any regions that escape binder
(and hence are not bound by it). Read more
fn has_escaping_regions(&self) -> bool
[src]
fn has_escaping_regions(&self) -> bool
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fn has_type_flags(&self, flags: TypeFlags) -> bool
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fn has_type_flags(&self, flags: TypeFlags) -> bool
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fn has_projections(&self) -> bool
[src]
fn has_projections(&self) -> bool
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fn references_error(&self) -> bool
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fn references_error(&self) -> bool
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fn has_param_types(&self) -> bool
[src]
fn has_param_types(&self) -> bool
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fn has_self_ty(&self) -> bool
[src]
fn has_self_ty(&self) -> bool
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fn has_infer_types(&self) -> bool
[src]
fn has_infer_types(&self) -> bool
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fn needs_infer(&self) -> bool
[src]
fn needs_infer(&self) -> bool
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fn has_skol(&self) -> bool
[src]
fn has_skol(&self) -> bool
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fn needs_subst(&self) -> bool
[src]
fn needs_subst(&self) -> bool
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fn has_re_skol(&self) -> bool
[src]
fn has_re_skol(&self) -> bool
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fn has_closure_types(&self) -> bool
[src]
fn has_closure_types(&self) -> bool
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fn has_free_regions(&self) -> bool
[src]
fn has_free_regions(&self) -> bool
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"Free" regions in this context means that it has any region that is not (a) erased or (b) late-bound. Read more
fn has_erasable_regions(&self) -> bool
[src]
fn has_erasable_regions(&self) -> bool
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True if there any any un-erased free regions.
fn is_global(&self) -> bool
[src]
fn is_global(&self) -> bool
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Indicates whether this value references only 'global' types/lifetimes that are the same regardless of what fn we are in. This is used for caching. Read more
fn has_late_bound_regions(&self) -> bool
[src]
fn has_late_bound_regions(&self) -> bool
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True if there are any late-bound regions
fn visit_tys_shallow(
&self,
visit: impl FnMut(Ty<'tcx>) -> bool
) -> bool
[src]
fn visit_tys_shallow(
&self,
visit: impl FnMut(Ty<'tcx>) -> bool
) -> bool
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A visitor that does not recurse into types, works like fn walk_shallow
in Ty
.
Auto Trait Implementations
impl<'tcx> !Send for ConstValue<'tcx>
impl<'tcx> !Send for ConstValue<'tcx>
impl<'tcx> !Sync for ConstValue<'tcx>
impl<'tcx> !Sync for ConstValue<'tcx>