Type Alias ConstKind

pub type ConstKind<'tcx> = ConstKind<TyCtxt<'tcx>>;

Aliased Type

pub enum ConstKind<'tcx> {
    Param(ParamConst),
    Infer(InferConst),
    Bound(DebruijnIndex, BoundVar),
    Placeholder(Placeholder<BoundVar>),
    Unevaluated(UnevaluatedConst<TyCtxt<'tcx>>),
    Value(Value<'tcx>),
    Error(ErrorGuaranteed),
    Expr(Expr<'tcx>),
}

Variants

Param(ParamConst)

A const generic parameter.

Infer(InferConst)

Infer the value of the const.

Bound(DebruijnIndex, BoundVar)

Bound const variable, used only when preparing a trait query.

Placeholder(Placeholder<BoundVar>)

A placeholder const - universally quantified higher-ranked const.

Unevaluated(UnevaluatedConst<TyCtxt<'tcx>>)

An unnormalized const item such as an anon const or assoc const or free const item. Right now anything other than anon consts does not actually work properly but this should

Value(Value<'tcx>)

Used to hold computed value.

Error(ErrorGuaranteed)

A placeholder for a const which could not be computed; this is propagated to avoid useless error messages.

Expr(Expr<'tcx>)

Unevaluated non-const-item, used by feature(generic_const_exprs) to represent const arguments such as N + 1 or foo(N)

Layout

Note: Unable to compute type layout, possibly due to this type having generic parameters. Layout can only be computed for concrete, fully-instantiated types.