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// revisions: rfail1 rfail2
// failure-status: 101
// error-pattern: not implemented
pub trait Interner {
type InternedVariableKinds;
}
trait RustIrDatabase<I: Interner> {
fn associated_ty_data(&self) -> AssociatedTyDatum<I>;
fn impl_datum(&self) -> ImplDatum<I>;
}
trait Fold<I: Interner> {
type Result;
}
impl<T, I: Interner> Fold<I> for Binders<T>
where
T: HasInterner<Interner = I> + Fold<I>,
<T as Fold<I>>::Result: HasInterner<Interner = I>,
I: Interner,
{
type Result = Binders<T::Result>;
}
impl<I: Interner> Fold<I> for WhereClause<I> {
type Result = Binders<WhereClause<I>>;
}
trait HasInterner {
type Interner: Interner;
}
impl<T: HasInterner> HasInterner for Vec<T> {
type Interner = T::Interner;
}
impl<T: HasInterner + ?Sized> HasInterner for &T {
type Interner = T::Interner;
}
pub struct VariableKind<I: Interner> {
_marker: std::marker::PhantomData<I>,
}
struct VariableKinds<I: Interner> {
_interned: I::InternedVariableKinds,
}
struct WhereClause<I: Interner> {
_marker: std::marker::PhantomData<I>,
}
impl<I: Interner> HasInterner for WhereClause<I> {
type Interner = I;
}
struct Binders<T> {
_marker: std::marker::PhantomData<T>,
}
impl<T: HasInterner> HasInterner for Binders<T> {
type Interner = T::Interner;
}
impl<T> Binders<&T> {
fn cloned(self) -> Binders<T> {
unimplemented!()
}
}
impl<T: HasInterner> Binders<T> {
fn map_ref<'a, U, OP>(&'a self, _op: OP) -> Binders<U>
where
OP: FnOnce(&'a T) -> U,
U: HasInterner<Interner = T::Interner>,
{
unimplemented!()
}
}
impl<T, I: Interner> Binders<T>
where
T: Fold<I> + HasInterner<Interner = I>,
I: Interner,
{
fn substitute(self) -> T::Result {
unimplemented!()
}
}
impl<V, U> IntoIterator for Binders<V>
where
V: HasInterner + IntoIterator<Item = U>,
U: HasInterner<Interner = V::Interner>,
{
type Item = Binders<U>;
type IntoIter = BindersIntoIterator<V>;
fn into_iter(self) -> Self::IntoIter {
unimplemented!()
}
}
struct BindersIntoIterator<V: HasInterner> {
_binders: VariableKinds<V::Interner>,
}
impl<V> Iterator for BindersIntoIterator<V>
where
V: HasInterner + IntoIterator,
<V as IntoIterator>::Item: HasInterner<Interner = V::Interner>,
{
type Item = Binders<<V as IntoIterator>::Item>;
fn next(&mut self) -> Option<Self::Item> {
unimplemented!()
}
}
struct ImplDatum<I: Interner> {
binders: Binders<ImplDatumBound<I>>,
}
struct ImplDatumBound<I: Interner> {
where_clauses: Vec<Binders<WhereClause<I>>>,
}
impl<I: Interner> HasInterner for ImplDatumBound<I> {
type Interner = I;
}
struct AssociatedTyDatum<I: Interner> {
binders: Binders<AssociatedTyDatumBound<I>>,
}
struct AssociatedTyDatumBound<I: Interner> {
where_clauses: Vec<Binders<WhereClause<I>>>,
}
impl<I: Interner> HasInterner for AssociatedTyDatumBound<I> {
type Interner = I;
}
struct ClauseBuilder<'me, I: Interner> {
db: &'me dyn RustIrDatabase<I>,
}
impl<'me, I: Interner> ClauseBuilder<'me, I> {
fn new() -> Self {
unimplemented!()
}
fn push_clause(&mut self, _conditions: impl Iterator<Item = Binders<Binders<WhereClause<I>>>>) {
unimplemented!()
}
}
pub(crate) struct Forest<I: Interner> {
_marker: std::marker::PhantomData<I>,
}
impl<I: Interner> Forest<I> {
fn iter_answers<'f>(&'f self) {
let builder = &mut ClauseBuilder::<I>::new();
let impl_datum = builder.db.impl_datum();
let impl_where_clauses = impl_datum
.binders
.map_ref(|b| &b.where_clauses)
.into_iter()
.map(|wc| wc.cloned().substitute());
let associated_ty = builder.db.associated_ty_data();
let assoc_ty_where_clauses = associated_ty
.binders
.map_ref(|b| &b.where_clauses)
.into_iter()
.map(|wc| wc.cloned().substitute());
builder.push_clause(impl_where_clauses.chain(assoc_ty_where_clauses));
}
}
pub struct SLGSolver {
pub(crate) forest: Forest<ChalkIr>,
}
impl SLGSolver {
fn new() -> Self {
unimplemented!()
}
fn solve_multiple(&self) {
let _answers = self.forest.iter_answers();
}
}
pub struct ChalkIr;
impl Interner for ChalkIr {
type InternedVariableKinds = Vec<VariableKind<ChalkIr>>;
}
fn main() {
let solver = SLGSolver::new();
solver.solve_multiple();
}
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