Enum rustc_infer::infer::type_variable::TypeVariableValue

pub enum TypeVariableValue<'tcx> {
    Known {
        value: Ty<'tcx>,
    },
    Unknown {
        universe: UniverseIndex,
    },
}

Variants

Known

Fields of Known

value: Ty<'tcx>

Unknown

Fields of Unknown

universe: UniverseIndex

Implementations

impl<'tcx> TypeVariableValue<'tcx>

pub fn known(&self) -> Option<Ty<'tcx>>

If this value is known, returns the type it is known to be. Otherwise, None.

pub fn is_unknown(&self) -> bool

Trait Implementations

impl<'tcx> Clone for TypeVariableValue<'tcx>

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

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'tcx> Copy for TypeVariableValue<'tcx>

impl<'tcx> Debug for TypeVariableValue<'tcx>

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

Formats the value using the given formatter.

impl<'tcx> UnifyValue for TypeVariableValue<'tcx>

type Error = NoError

Defines the type to return when merging of two values fails. If merging is infallible, use the special struct NoError found in this crate, which unlocks various more convenient methods on the unification table.

fn unify_values(value1: &Self, value2: &Self) -> Result<Self, NoError>

Given two values, produce a new value that combines them. If that is not possible, produce an error.