Split SolverDelegate back out from InferCtxtLike

compiler/rustc_next_trait_solver/src/canonicalizer.rs

@@ -4,7 +4,8 @@ use rustc_type_ir::fold::{TypeFoldable, TypeFolder, TypeSuperFoldable};
 use rustc_type_ir::inherent::*;
 use rustc_type_ir::visit::TypeVisitableExt;
 use rustc_type_ir::{
-    self as ty, Canonical, CanonicalTyVarKind, CanonicalVarInfo, CanonicalVarKind, Interner,
+    self as ty, Canonical, CanonicalTyVarKind, CanonicalVarInfo, CanonicalVarKind, InferCtxtLike,
+    Interner,
 };
 
 use crate::delegate::SolverDelegate;

compiler/rustc_next_trait_solver/src/delegate.rs

@@ -1,18 +1,20 @@
 use std::fmt::Debug;
+use std::ops::Deref;
 
 use rustc_type_ir::fold::TypeFoldable;
-use rustc_type_ir::relate::Relate;
 use rustc_type_ir::solve::{Certainty, Goal, NoSolution, SolverMode};
-use rustc_type_ir::{self as ty, Interner};
+use rustc_type_ir::{self as ty, InferCtxtLike, Interner};
 
-pub trait SolverDelegate: Sized {
+pub trait SolverDelegate:
+    Deref<Target: InferCtxtLike<Interner = <Self as SolverDelegate>::Interner>> + Sized
+{
     type Interner: Interner;
-    fn cx(&self) -> Self::Interner;
+    fn cx(&self) -> Self::Interner {
+        (**self).cx()
+    }
 
     type Span: Copy;
 
-    fn solver_mode(&self) -> SolverMode;
-
     fn build_with_canonical<V>(
         cx: Self::Interner,
         solver_mode: SolverMode,
@@ -21,82 +23,12 @@ pub trait SolverDelegate: Sized {
     where
         V: TypeFoldable<Self::Interner>;
 
-    fn universe(&self) -> ty::UniverseIndex;
-    fn create_next_universe(&self) -> ty::UniverseIndex;
-
-    fn universe_of_ty(&self, ty: ty::TyVid) -> Option<ty::UniverseIndex>;
-    fn universe_of_lt(&self, lt: ty::RegionVid) -> Option<ty::UniverseIndex>;
-    fn universe_of_ct(&self, ct: ty::ConstVid) -> Option<ty::UniverseIndex>;
-
-    fn root_ty_var(&self, var: ty::TyVid) -> ty::TyVid;
-    fn root_const_var(&self, var: ty::ConstVid) -> ty::ConstVid;
-
-    fn opportunistic_resolve_ty_var(&self, vid: ty::TyVid) -> <Self::Interner as Interner>::Ty;
-    fn opportunistic_resolve_int_var(&self, vid: ty::IntVid) -> <Self::Interner as Interner>::Ty;
-    fn opportunistic_resolve_float_var(
-        &self,
-        vid: ty::FloatVid,
-    ) -> <Self::Interner as Interner>::Ty;
-    fn opportunistic_resolve_ct_var(
-        &self,
-        vid: ty::ConstVid,
-    ) -> <Self::Interner as Interner>::Const;
-    fn opportunistic_resolve_effect_var(
-        &self,
-        vid: ty::EffectVid,
-    ) -> <Self::Interner as Interner>::Const;
-    fn opportunistic_resolve_lt_var(
-        &self,
-        vid: ty::RegionVid,
-    ) -> <Self::Interner as Interner>::Region;
-
-    fn defining_opaque_types(&self) -> <Self::Interner as Interner>::DefiningOpaqueTypes;
-
-    fn next_ty_infer(&self) -> <Self::Interner as Interner>::Ty;
-    fn next_const_infer(&self) -> <Self::Interner as Interner>::Const;
-    fn fresh_args_for_item(
-        &self,
-        def_id: <Self::Interner as Interner>::DefId,
-    ) -> <Self::Interner as Interner>::GenericArgs;
-
     fn fresh_var_for_kind_with_span(
         &self,
         arg: <Self::Interner as Interner>::GenericArg,
         span: Self::Span,
     ) -> <Self::Interner as Interner>::GenericArg;
 
-    fn instantiate_binder_with_infer<T: TypeFoldable<Self::Interner> + Copy>(
-        &self,
-        value: ty::Binder<Self::Interner, T>,
-    ) -> T;
-
-    fn enter_forall<T: TypeFoldable<Self::Interner> + Copy, U>(
-        &self,
-        value: ty::Binder<Self::Interner, T>,
-        f: impl FnOnce(T) -> U,
-    ) -> U;
-
-    fn relate<T: Relate<Self::Interner>>(
-        &self,
-        param_env: <Self::Interner as Interner>::ParamEnv,
-        lhs: T,
-        variance: ty::Variance,
-        rhs: T,
-    ) -> Result<Vec<Goal<Self::Interner, <Self::Interner as Interner>::Predicate>>, NoSolution>;
-
-    fn eq_structurally_relating_aliases<T: Relate<Self::Interner>>(
-        &self,
-        param_env: <Self::Interner as Interner>::ParamEnv,
-        lhs: T,
-        rhs: T,
-    ) -> Result<Vec<Goal<Self::Interner, <Self::Interner as Interner>::Predicate>>, NoSolution>;
-
-    fn resolve_vars_if_possible<T>(&self, value: T) -> T
-    where
-        T: TypeFoldable<Self::Interner>;
-
-    fn probe<T>(&self, probe: impl FnOnce() -> T) -> T;
-
     // FIXME: Uplift the leak check into this crate.
     fn leak_check(&self, max_input_universe: ty::UniverseIndex) -> Result<(), NoSolution>;
 
@@ -112,18 +44,6 @@ pub trait SolverDelegate: Sized {
         unevaluated: ty::UnevaluatedConst<Self::Interner>,
     ) -> Option<<Self::Interner as Interner>::Const>;
 
-    fn sub_regions(
-        &self,
-        sub: <Self::Interner as Interner>::Region,
-        sup: <Self::Interner as Interner>::Region,
-    );
-
-    fn register_ty_outlives(
-        &self,
-        ty: <Self::Interner as Interner>::Ty,
-        r: <Self::Interner as Interner>::Region,
-    );
-
     // FIXME: This only is here because `wf::obligations` is in `rustc_trait_selection`!
     fn well_formed_goals(
         &self,

compiler/rustc_next_trait_solver/src/resolve.rs

@@ -2,7 +2,7 @@ use crate::delegate::SolverDelegate;
 use rustc_type_ir::fold::{TypeFoldable, TypeFolder, TypeSuperFoldable};
 use rustc_type_ir::inherent::*;
 use rustc_type_ir::visit::TypeVisitableExt;
-use rustc_type_ir::{self as ty, Interner};
+use rustc_type_ir::{self as ty, InferCtxtLike, Interner};
 
 ///////////////////////////////////////////////////////////////////////////
 // EAGER RESOLUTION

compiler/rustc_next_trait_solver/src/solve/eval_ctxt/canonical.rs

@@ -14,7 +14,7 @@ use std::iter;
 use rustc_index::IndexVec;
 use rustc_type_ir::fold::TypeFoldable;
 use rustc_type_ir::inherent::*;
-use rustc_type_ir::{self as ty, Canonical, CanonicalVarValues, Interner};
+use rustc_type_ir::{self as ty, Canonical, CanonicalVarValues, InferCtxtLike, Interner};
 use tracing::{instrument, trace};
 
 use crate::canonicalizer::{CanonicalizeMode, Canonicalizer};

compiler/rustc_next_trait_solver/src/solve/eval_ctxt/mod.rs

@@ -7,7 +7,7 @@ use rustc_type_ir::fold::{TypeFoldable, TypeFolder, TypeSuperFoldable};
 use rustc_type_ir::inherent::*;
 use rustc_type_ir::relate::Relate;
 use rustc_type_ir::visit::{TypeSuperVisitable, TypeVisitable, TypeVisitableExt, TypeVisitor};
-use rustc_type_ir::{self as ty, CanonicalVarValues, Interner};
+use rustc_type_ir::{self as ty, CanonicalVarValues, InferCtxtLike, Interner};
 use rustc_type_ir_macros::{Lift_Generic, TypeFoldable_Generic, TypeVisitable_Generic};
 use tracing::{instrument, trace};
 

compiler/rustc_next_trait_solver/src/solve/eval_ctxt/probe.rs

@@ -1,6 +1,6 @@
 use std::marker::PhantomData;
 
-use rustc_type_ir::Interner;
+use rustc_type_ir::{InferCtxtLike, Interner};
 use tracing::instrument;
 
 use crate::delegate::SolverDelegate;