Enum rustc_infer::infer::TyOrConstInferVar

pub enum TyOrConstInferVar<'tcx> {
    Ty(TyVid),
    TyInt(IntVid),
    TyFloat(FloatVid),
    Const(ConstVid<'tcx>),
}

Helper for ty_or_const_infer_var_changed (see comment on that), currently used only for traits::fulfill’s list of stalled_on inference variables.

Variants

Ty(TyVid)

Equivalent to ty::Infer(ty::TyVar(_)).

TyInt(IntVid)

Equivalent to ty::Infer(ty::IntVar(_)).

TyFloat(FloatVid)

Equivalent to ty::Infer(ty::FloatVar(_)).

Const(ConstVid<'tcx>)

Equivalent to ty::ConstKind::Infer(ty::InferConst::Var(_)).

Implementations

impl<'tcx> TyOrConstInferVar<'tcx>

pub fn maybe_from_generic_arg(arg: GenericArg<'tcx>) -> Option<Self>

Tries to extract an inference variable from a type or a constant, returns None for types other than ty::Infer(_) (or InferTy::Fresh*) and for constants other than ty::ConstKind::Infer(_) (or InferConst::Fresh).

pub fn maybe_from_ty(ty: Ty<'tcx>) -> Option<Self>

Tries to extract an inference variable from a type, returns None for types other than ty::Infer(_) (or InferTy::Fresh*).

pub fn maybe_from_const(ct: &'tcx Const<'tcx>) -> Option<Self>

Tries to extract an inference variable from a constant, returns None for constants other than ty::ConstKind::Infer(_) (or InferConst::Fresh).

Trait Implementations

impl<'tcx> Clone for TyOrConstInferVar<'tcx>

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

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'tcx> Debug for TyOrConstInferVar<'tcx>

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

Formats the value using the given formatter.

impl<'tcx> Copy for TyOrConstInferVar<'tcx>

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference’s “Type Layout” chapter for details on type layout guarantees.

Size: 8 bytes

Size for each variant:

• Ty: 4 bytes
• TyInt: 4 bytes
• TyFloat: 4 bytes
• Const: 4 bytes