move `structural_traits` into `assembly`

4 files changed, 9 insertions, 11 deletions

diff --git a/compiler/rustc_trait_selection/src/solve/assembly.rs b/compiler/rustc_trait_selection/src/solve/assembly/mod.rs
index 7c9a69f0398..12ee80b6722 100644
--- a/compiler/rustc_trait_selection/src/solve/assembly.rs
+++ b/compiler/rustc_trait_selection/src/solve/assembly/mod.rs
@@ -1,8 +1,6 @@
 //! Code shared by trait and projection goals for candidate assembly.
 
 use super::search_graph::OverflowHandler;
-#[cfg(doc)]
-use super::trait_goals::structural_traits::*;
 use super::{EvalCtxt, SolverMode};
 use crate::solve::CanonicalResponseExt;
 use crate::traits::coherence;
@@ -16,6 +14,8 @@ use rustc_middle::ty::TypeFoldable;
 use rustc_middle::ty::{self, Ty, TyCtxt};
 use std::fmt::Debug;
 
+pub(super) mod structural_traits;
+
 /// A candidate is a possible way to prove a goal.
 ///
 /// It consists of both the `source`, which describes how that goal would be proven,
diff --git a/compiler/rustc_trait_selection/src/solve/trait_goals/structural_traits.rs b/compiler/rustc_trait_selection/src/solve/assembly/structural_traits.rs
index 9e851b788a5..2de556185e3 100644
--- a/compiler/rustc_trait_selection/src/solve/trait_goals/structural_traits.rs
+++ b/compiler/rustc_trait_selection/src/solve/assembly/structural_traits.rs
@@ -11,7 +11,7 @@ use crate::solve::EvalCtxt;
 //
 // For types with an "existential" binder, i.e. generator witnesses, we also
 // instantiate the binder with placeholders eagerly.
-pub(super) fn instantiate_constituent_tys_for_auto_trait<'tcx>(
+pub(crate) fn instantiate_constituent_tys_for_auto_trait<'tcx>(
     ecx: &EvalCtxt<'_, 'tcx>,
     ty: Ty<'tcx>,
 ) -> Result<Vec<Ty<'tcx>>, NoSolution> {
@@ -87,7 +87,7 @@ pub(super) fn instantiate_constituent_tys_for_auto_trait<'tcx>(
     }
 }
 
-fn replace_erased_lifetimes_with_bound_vars<'tcx>(
+pub(crate) fn replace_erased_lifetimes_with_bound_vars<'tcx>(
     tcx: TyCtxt<'tcx>,
     ty: Ty<'tcx>,
 ) -> ty::Binder<'tcx, Ty<'tcx>> {
@@ -108,7 +108,7 @@ fn replace_erased_lifetimes_with_bound_vars<'tcx>(
     ty::Binder::bind_with_vars(ty, bound_vars)
 }
 
-pub(super) fn instantiate_constituent_tys_for_sized_trait<'tcx>(
+pub(crate) fn instantiate_constituent_tys_for_sized_trait<'tcx>(
     ecx: &EvalCtxt<'_, 'tcx>,
     ty: Ty<'tcx>,
 ) -> Result<Vec<Ty<'tcx>>, NoSolution> {
@@ -158,7 +158,7 @@ pub(super) fn instantiate_constituent_tys_for_sized_trait<'tcx>(
     }
 }
 
-pub(super) fn instantiate_constituent_tys_for_copy_clone_trait<'tcx>(
+pub(crate) fn instantiate_constituent_tys_for_copy_clone_trait<'tcx>(
     ecx: &EvalCtxt<'_, 'tcx>,
     ty: Ty<'tcx>,
 ) -> Result<Vec<Ty<'tcx>>, NoSolution> {
diff --git a/compiler/rustc_trait_selection/src/solve/project_goals.rs b/compiler/rustc_trait_selection/src/solve/project_goals.rs
index e0a69438dec..2a47da81ec7 100644
--- a/compiler/rustc_trait_selection/src/solve/project_goals.rs
+++ b/compiler/rustc_trait_selection/src/solve/project_goals.rs
@@ -1,7 +1,6 @@
 use crate::traits::specialization_graph;
 
-use super::assembly;
-use super::trait_goals::structural_traits;
+use super::assembly::{self, structural_traits};
 use super::EvalCtxt;
 use rustc_errors::ErrorGuaranteed;
 use rustc_hir::def::DefKind;
diff --git a/compiler/rustc_trait_selection/src/solve/trait_goals.rs b/compiler/rustc_trait_selection/src/solve/trait_goals.rs
index a2203473ca9..81f89fd950c 100644
--- a/compiler/rustc_trait_selection/src/solve/trait_goals.rs
+++ b/compiler/rustc_trait_selection/src/solve/trait_goals.rs
@@ -1,6 +1,7 @@
 //! Dealing with trait goals, i.e. `T: Trait<'a, U>`.
 
-use super::{assembly, EvalCtxt, SolverMode};
+use super::assembly::{self, structural_traits};
+use super::{EvalCtxt, SolverMode};
 use rustc_hir::def_id::DefId;
 use rustc_hir::LangItem;
 use rustc_infer::traits::query::NoSolution;
@@ -11,8 +12,6 @@ use rustc_middle::ty::{self, ToPredicate, Ty, TyCtxt};
 use rustc_middle::ty::{TraitPredicate, TypeVisitableExt};
 use rustc_span::DUMMY_SP;
 
-pub mod structural_traits;
-
 impl<'tcx> assembly::GoalKind<'tcx> for TraitPredicate<'tcx> {
     fn self_ty(self) -> Ty<'tcx> {
         self.self_ty()