Enum ConstSource 

pub enum ConstSource<'tcx> {
    Item {
        def_id: DefId,
        args: &'tcx RawList<(), GenericArg<'tcx>>,
    },
    Promoted {
        def_id: DefId,
        args: &'tcx RawList<(), GenericArg<'tcx>>,
        promoted: Promoted,
    },
    Global(GlobalRef),
    TyConst(Alias<TyCtxt<'tcx>, AliasConstKind<TyCtxt<'tcx>>>),
    ValTree(Value<'tcx>),
    Value(ConstValue, Ty<'tcx>),
}

A constant that we can ask rustc to evaluate.

Variants

Item

A const item or associated const.

Fields

def_id: DefId

args: &'tcx RawList<(), GenericArg<'tcx>>

Promoted

A promoted constant in the body of def_id.

Fields

def_id: DefId

args: &'tcx RawList<(), GenericArg<'tcx>>

promoted: Promoted

Global(GlobalRef)

The contents of a global, viewed at type [ConstReader::global_ty].

TyConst(Alias<TyCtxt<'tcx>, AliasConstKind<TyCtxt<'tcx>>>)

A type-system constant, e.g. an array length or an inline const {} block.

ValTree(Value<'tcx>)

An already-evaluated type-system constant.

Value(ConstValue, Ty<'tcx>)

An already-evaluated constant, e.g. found in MIR.

Trait Implementations

impl<'tcx> Clone for ConstSource<'tcx>

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

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'tcx> Copy for ConstSource<'tcx>

impl<'tcx> Debug for ConstSource<'tcx>

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

Formats the value using the given formatter.