Struct rustc_middle::mir::Constant

pub struct Constant<'tcx> {
    pub span: Span,
    pub user_ty: Option<UserTypeAnnotationIndex>,
    pub literal: &'tcx Const<'tcx>,
}

Constants

Two constants are equal if they are the same constant. Note that this does not necessarily mean that they are == in Rust. In particular, one must be wary of NaN!

Fields

span: Span

user_ty: Option<UserTypeAnnotationIndex>

Optional user-given type: for something like collect::<Vec<_>>, this would be present and would indicate that Vec<_> was explicitly specified.

Needed for NLL to impose user-given type constraints.

literal: &'tcx Const<'tcx>

Implementations

impl<'tcx> Constant<'tcx>

pub fn check_static_ptr(&self, tcx: TyCtxt<'_>) -> Option<DefId>

Trait Implementations

impl<'tcx> Clone for Constant<'tcx>

fn clone(&self) -> Constant<'tcx>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'tcx> Copy for Constant<'tcx>

impl<'tcx> Debug for Constant<'tcx>

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

Formats the value using the given formatter.

impl<'tcx, __D: TyDecoder<'tcx>> Decodable<__D> for Constant<'tcx>

fn decode(__decoder: &mut __D) -> Result<Self, <__D as Decoder>::Error>

impl<'tcx> Display for Constant<'tcx>

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

Formats the value using the given formatter.

impl<'tcx, __E: TyEncoder<'tcx>> Encodable<__E> for Constant<'tcx>

fn encode(&self, __encoder: &mut __E) -> Result<(), <__E as Encoder>::Error>

impl<'tcx, '__ctx> HashStable<StableHashingContext<'__ctx>> for Constant<'tcx>

fn hash_stable(
    &self,
    __hcx: &mut StableHashingContext<'__ctx>,
    __hasher: &mut StableHasher
)

impl<'tcx> PartialEq<Constant<'tcx>> for Constant<'tcx>

fn eq(&self, other: &Constant<'tcx>) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Constant<'tcx>) -> bool

This method tests for !=.

impl<'tcx> StructuralPartialEq for Constant<'tcx>

impl<'tcx> TypeFoldable<'tcx> for Constant<'tcx>

fn super_fold_with<F: TypeFolder<'tcx>>(&self, folder: &mut F) -> Self

fn super_visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> bool

fn fold_with<F: TypeFolder<'tcx>>(&self, folder: &mut F) -> Self

fn visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> bool

fn has_vars_bound_at_or_above(&self, binder: DebruijnIndex) -> bool

Returns 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.

fn has_vars_bound_above(&self, binder: DebruijnIndex) -> bool

Returns true if this self has any regions that escape binder (and hence are not bound by it).

fn has_escaping_bound_vars(&self) -> bool

fn has_type_flags(&self, flags: TypeFlags) -> bool

fn has_projections(&self) -> bool

fn has_opaque_types(&self) -> bool

fn references_error(&self) -> bool

fn has_param_types_or_consts(&self) -> bool

fn has_infer_regions(&self) -> bool

fn has_infer_types(&self) -> bool

fn has_infer_types_or_consts(&self) -> bool

fn needs_infer(&self) -> bool

fn has_placeholders(&self) -> bool

fn needs_subst(&self) -> bool

fn has_free_regions(&self) -> bool

"Free" regions in this context means that it has any region that is not (a) erased or (b) late-bound.

fn has_erased_regions(&self) -> bool

fn has_erasable_regions(&self) -> bool

True if there are any un-erased free regions.

fn is_global(&self) -> bool

Indicates whether this value references only 'global' generic parameters that are the same regardless of what fn we are in. This is used for caching.

fn has_late_bound_regions(&self) -> bool

True if there are any late-bound regions

fn still_further_specializable(&self) -> bool

Indicates whether this value still has parameters/placeholders/inference variables which could be replaced later, in a way that would change the results of impl specialization.

fn visit_tys_shallow(&self, visit: impl FnMut(Ty<'tcx>) -> bool) -> bool

A visitor that does not recurse into types, works like fn walk_shallow in Ty.