Struct NeverBinder 

pub struct NeverBinder<T> {
    _data: Never,
    _value: T,
}

Fields

_data: Never

_value: T

Trait Implementations

impl<'db, T: Subst<'db, Output = T>> BoundTerm<'db> for NeverBinder<T>

const BINDER_LEVELS: usize = 0

type BoundTerm = NeverBinder<T>

type LeafTerm = T

fn bind( _db: &'db dyn Db, _symbols_to_bind: &mut dyn Iterator<Item = Vec<SymVariable<'db>>>, _leaf_value: Self::LeafTerm, ) -> Self

fn as_binder(&self) -> Result<&Binder<'db, Self::BoundTerm>, &Self::LeafTerm>

impl<T: Clone> Clone for NeverBinder<T>

fn clone(&self) -> NeverBinder<T>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: Debug> Debug for NeverBinder<T>

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

Formats the value using the given formatter.

impl<T: Hash> Hash for NeverBinder<T>

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<T: Ord> Ord for NeverBinder<T>

fn cmp(&self, other: &NeverBinder<T>) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl<T: PartialEq> PartialEq for NeverBinder<T>

fn eq(&self, other: &NeverBinder<T>) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<T: PartialOrd> PartialOrd for NeverBinder<T>

fn partial_cmp(&self, other: &NeverBinder<T>) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl<'db, T> Subst<'db> for NeverBinder<T>

where T: Debug,

type GenericTerm = SymGenericTerm<'db>

The notion of generic term appropriate for this type. When we substitute variables, this is the type of value that we replace them with.

fn subst_vars( &self, db: &'db dyn Db, map: &Map<SymVariable<'db>, Self::GenericTerm>, ) -> Self::Output

Returns a version of self where universal free variables have been replaced by the corresponding entry in terms. If a variable is not present in terms it is not substituted.

fn subst_var( &self, db: &'db dyn Db, var: SymVariable<'db>, term: Self::GenericTerm, ) -> Self::Output

Replace the variable var with term.

fn resolve_infer_var( &self, db: &'db dyn Db, bound_vars: &mut Vec<SymVariable<'db>>, op: impl FnMut(InferVarIndex) -> Option<Self::GenericTerm>, ) -> Self::Output

Replace all inference variables with whatever is returned by op; if op returns None, the inference variable is left unchanged.

impl<'db, T, Term> SubstWith<'db, Term> for NeverBinder<T>

type Output = NeverBinder<T>

The type of the resulting term; typically Self but not always.

fn identity(&self) -> Self::Output

Reproduce self with no edits.

fn subst_with<'subst>( &'subst self, _db: &'db dyn Db, _bound_vars: &mut Vec<SymVariable<'db>>, _subst_fns: &mut SubstitutionFns<'_, 'db, Term>, ) -> Self::Output

Replace self applying the changes from subst_fns.

impl<T> Update for NeverBinder<T>

unsafe fn maybe_update(_old_pointer: *mut Self, _new_value: Self) -> bool

Returns

impl<T: Copy> Copy for NeverBinder<T>

impl<T: Eq> Eq for NeverBinder<T>

impl<T> StructuralPartialEq for NeverBinder<T>