Move typeck logically in the module tree out to the root and clamp

down on its exports. Remove some dead code that is revealed.

src/librustc/lib.rs

@@ -95,10 +95,12 @@ pub mod middle {
     pub mod traits;
     pub mod ty;
     pub mod ty_fold;
-    pub mod typeck;
     pub mod weak_lang_items;
 }
 
+#[path="middle/typeck/mod.rs"]
+pub mod typeck;
+
 pub mod metadata;
 
 pub mod session;

src/librustc/middle/ty.rs

@@ -6192,3 +6192,29 @@ impl<'tcx> Repr<'tcx> for vtable_origin<'tcx> {
         }
     }
 }
+
+pub fn make_substs_for_receiver_types<'tcx>(tcx: &ty::ctxt<'tcx>,
+                                            trait_ref: &ty::TraitRef<'tcx>,
+                                            method: &ty::Method<'tcx>)
+                                            -> subst::Substs<'tcx>
+{
+    /*!
+     * Substitutes the values for the receiver's type parameters
+     * that are found in method, leaving the method's type parameters
+     * intact.
+     */
+
+    let meth_tps: Vec<Ty> =
+        method.generics.types.get_slice(subst::FnSpace)
+              .iter()
+              .map(|def| ty::mk_param_from_def(tcx, def))
+              .collect();
+    let meth_regions: Vec<ty::Region> =
+        method.generics.regions.get_slice(subst::FnSpace)
+              .iter()
+              .map(|def| ty::ReEarlyBound(def.def_id.node, def.space,
+                                          def.index, def.name))
+              .collect();
+    trait_ref.substs.clone().with_method(meth_tps, meth_regions)
+}
+

src/librustc/middle/typeck/astconv.rs

@@ -54,11 +54,10 @@ use middle::resolve_lifetime as rl;
 use middle::subst::{FnSpace, TypeSpace, AssocSpace, SelfSpace, Subst, Substs};
 use middle::subst::{VecPerParamSpace};
 use middle::ty::{mod, Ty};
-use middle::typeck::lookup_def_tcx;
-use middle::typeck::rscope::{UnelidableRscope, RegionScope, SpecificRscope,
-                             ShiftedRscope, BindingRscope};
-use middle::typeck::rscope;
-use middle::typeck::TypeAndSubsts;
+use typeck::lookup_def_tcx;
+use typeck::rscope::{mod, UnelidableRscope, RegionScope, SpecificRscope,
+                     ShiftedRscope, BindingRscope};
+use typeck::TypeAndSubsts;
 use util::common::ErrorReported;
 use util::nodemap::DefIdMap;
 use util::ppaux::{mod, Repr, UserString};

src/librustc/middle/typeck/check/_match.rs

@@ -12,10 +12,10 @@ use middle::def;
 use middle::pat_util::{PatIdMap, pat_id_map, pat_is_binding, pat_is_const};
 use middle::subst::{Subst, Substs};
 use middle::ty::{mod, Ty};
-use middle::typeck::check::{check_expr, check_expr_has_type, demand, FnCtxt};
-use middle::typeck::check::{instantiate_path, structurally_resolved_type, valid_range_bounds};
+use typeck::check::{check_expr, check_expr_has_type, demand, FnCtxt};
+use typeck::check::{instantiate_path, structurally_resolved_type, valid_range_bounds};
 use middle::infer::{mod, resolve};
-use middle::typeck::require_same_types;
+use typeck::require_same_types;
 use util::nodemap::FnvHashMap;
 
 use std::cmp;

src/librustc/middle/typeck/check/closure.rs

@@ -17,8 +17,8 @@ use super::FnCtxt;
 use middle::infer;
 use middle::subst;
 use middle::ty::{mod, Ty};
-use middle::typeck::astconv;
-use middle::typeck::rscope::RegionScope;
+use typeck::astconv;
+use typeck::rscope::RegionScope;
 use syntax::abi;
 use syntax::ast;
 use syntax::ast_util;

src/librustc/middle/typeck/check/demand.rs

@@ -10,7 +10,7 @@
 
 
 use middle::ty::{mod, Ty};
-use middle::typeck::check::FnCtxt;
+use typeck::check::FnCtxt;
 use middle::infer;
 use middle::infer::resolve_type;
 use middle::infer::resolve::try_resolve_tvar_shallow;
@@ -29,12 +29,6 @@ pub fn suptype<'a, 'tcx>(fcx: &FnCtxt<'a, 'tcx>, sp: Span,
         |sp, e, a, s| { fcx.report_mismatched_types(sp, e, a, s) })
 }
 
-pub fn subtype<'a, 'tcx>(fcx: &FnCtxt<'a, 'tcx>, sp: Span,
-                         expected: Ty<'tcx>, actual: Ty<'tcx>) {
-    suptype_with_fn(fcx, sp, true, actual, expected,
-        |sp, a, e, s| { fcx.report_mismatched_types(sp, e, a, s) })
-}
-
 pub fn suptype_with_fn<'a, 'tcx>(fcx: &FnCtxt<'a, 'tcx>,
                                  sp: Span,
                                  b_is_expected: bool,

src/librustc/middle/typeck/check/method/confirm.rs

@@ -15,7 +15,7 @@ use middle::traits;
 use middle::ty::{mod, Ty};
 use middle::ty::{MethodCall, MethodCallee, MethodObject, MethodOrigin,
                  MethodParam, MethodStatic, MethodTraitObject, MethodTypeParam};
-use middle::typeck::check::{mod, FnCtxt, NoPreference, PreferMutLvalue};
+use typeck::check::{mod, FnCtxt, NoPreference, PreferMutLvalue};
 use middle::infer;
 use middle::infer::InferCtxt;
 use middle::ty_fold::HigherRankedFoldable;

src/librustc/middle/typeck/check/method/mod.rs

@@ -15,11 +15,11 @@ use middle::subst::{Subst};
 use middle::traits;
 use middle::ty::*;
 use middle::ty;
-use middle::typeck::astconv::AstConv;
-use middle::typeck::check::{FnCtxt};
-use middle::typeck::check::{impl_self_ty};
-use middle::typeck::check::vtable;
-use middle::typeck::check::vtable::select_new_fcx_obligations;
+use typeck::astconv::AstConv;
+use typeck::check::{FnCtxt};
+use typeck::check::{impl_self_ty};
+use typeck::check::vtable;
+use typeck::check::vtable::select_new_fcx_obligations;
 use middle::infer;
 use util::ppaux::{Repr, UserString};
 

src/librustc/middle/typeck/check/method/probe.rs

@@ -19,8 +19,8 @@ use middle::traits;
 use middle::ty::{mod, Ty};
 use middle::ty::{MethodObject};
 use middle::ty_fold::HigherRankedFoldable;
-use middle::typeck::check;
-use middle::typeck::check::{FnCtxt, NoPreference};
+use typeck::check;
+use typeck::check::{FnCtxt, NoPreference};
 use middle::infer;
 use middle::infer::InferCtxt;
 use syntax::ast;

src/librustc/middle/typeck/check/mod.rs

@@ -96,11 +96,11 @@ use middle::ty::{mod, Ty};
 use middle::ty::liberate_late_bound_regions;
 use middle::ty::{MethodCall, MethodCallee, MethodMap, ObjectCastMap};
 use middle::ty_fold::TypeFolder;
-use middle::typeck::astconv::{mod, ast_region_to_region, ast_ty_to_ty, AstConv};
-use middle::typeck::check::_match::pat_ctxt;
-use middle::typeck::rscope::RegionScope;
-use middle::typeck::{CrateCtxt, lookup_def_ccx, no_params, require_same_types};
-use middle::typeck::TypeAndSubsts;
+use typeck::astconv::{mod, ast_region_to_region, ast_ty_to_ty, AstConv};
+use typeck::check::_match::pat_ctxt;
+use typeck::rscope::RegionScope;
+use typeck::{CrateCtxt, lookup_def_ccx, no_params, require_same_types};
+use typeck::TypeAndSubsts;
 use middle::lang_items::TypeIdLangItem;
 use lint;
 use util::common::{block_query, indenter, loop_query};
@@ -1873,13 +1873,6 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         }
     }
 
-    /// Fetch type of `expr` after applying adjustments that have been recorded in the fcx.
-    pub fn expr_ty_adjusted(&self, expr: &ast::Expr) -> Ty<'tcx> {
-        let adjustments = self.inh.adjustments.borrow();
-        let adjustment = adjustments.get(&expr.id);
-        self.adjust_expr_ty(expr, adjustment)
-    }
-
     /// Apply `adjustment` to the type of `expr`
     pub fn adjust_expr_ty(&self,
                           expr: &ast::Expr,
@@ -1932,16 +1925,6 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         infer::mk_subty(self.infcx(), a_is_expected, origin, sub, sup)
     }
 
-    pub fn can_mk_subty(&self, sub: Ty<'tcx>, sup: Ty<'tcx>)
-                        -> Result<(), ty::type_err<'tcx>> {
-        infer::can_mk_subty(self.infcx(), sub, sup)
-    }
-
-    pub fn can_mk_eqty(&self, sub: Ty<'tcx>, sup: Ty<'tcx>)
-                       -> Result<(), ty::type_err<'tcx>> {
-        infer::can_mk_eqty(self.infcx(), sub, sup)
-    }
-
     pub fn mk_assignty(&self,
                        expr: &ast::Expr,
                        sub: Ty<'tcx>,

src/librustc/middle/typeck/check/regionck.rs

@@ -120,10 +120,10 @@ use middle::region::CodeExtent;
 use middle::traits;
 use middle::ty::{ReScope};
 use middle::ty::{mod, Ty, MethodCall};
-use middle::typeck::astconv::AstConv;
-use middle::typeck::check::FnCtxt;
-use middle::typeck::check::regionmanip;
-use middle::typeck::check::vtable;
+use typeck::astconv::AstConv;
+use typeck::check::FnCtxt;
+use typeck::check::regionmanip;
+use typeck::check::vtable;
 use middle::infer::resolve_and_force_all_but_regions;
 use middle::infer::resolve_type;
 use middle::infer;

src/librustc/middle/typeck/check/vtable.rs

@@ -15,7 +15,7 @@ use middle::traits::{Obligation, obligation_for_builtin_bound};
 use middle::traits::{FulfillmentError, CodeSelectionError, CodeAmbiguity};
 use middle::traits::{ObligationCause};
 use middle::ty::{mod, Ty};
-use middle::typeck::check::{FnCtxt,
+use typeck::check::{FnCtxt,
                             structurally_resolved_type};
 use middle::infer;
 use std::rc::Rc;

src/librustc/middle/typeck/check/wf.rs

@@ -15,9 +15,9 @@ use middle::traits;
 use middle::ty::{mod, Ty};
 use middle::ty::liberate_late_bound_regions;
 use middle::ty_fold::{TypeFolder, TypeFoldable};
-use middle::typeck::astconv::AstConv;
-use middle::typeck::check::{FnCtxt, Inherited, blank_fn_ctxt, vtable, regionck};
-use middle::typeck::CrateCtxt;
+use typeck::astconv::AstConv;
+use typeck::check::{FnCtxt, Inherited, blank_fn_ctxt, vtable, regionck};
+use typeck::CrateCtxt;
 use util::ppaux::Repr;
 
 use std::collections::HashSet;

src/librustc/middle/typeck/check/writeback.rs

@@ -17,13 +17,13 @@ use middle::def;
 use middle::pat_util;
 use middle::ty::{mod, Ty, MethodCall, MethodCallee};
 use middle::ty_fold::{TypeFolder,TypeFoldable};
-use middle::typeck::astconv::AstConv;
-use middle::typeck::check::FnCtxt;
+use typeck::astconv::AstConv;
+use typeck::check::FnCtxt;
 use middle::infer::{force_all, resolve_all, resolve_region};
 use middle::infer::resolve_type;
 use middle::infer;
-use middle::typeck::write_substs_to_tcx;
-use middle::typeck::write_ty_to_tcx;
+use typeck::write_substs_to_tcx;
+use typeck::write_ty_to_tcx;
 use util::ppaux::Repr;
 
 use std::cell::Cell;

src/librustc/middle/typeck/coherence/mod.rs

@@ -19,7 +19,6 @@
 use metadata::csearch::{each_impl, get_impl_trait};
 use metadata::csearch;
 use middle::subst;
-use middle::subst::{Substs};
 use middle::ty::{ImplContainer, ImplOrTraitItemId, MethodTraitItemId};
 use middle::ty::{TypeTraitItemId, lookup_item_type};
 use middle::ty::{Ty, ty_bool, ty_char, ty_enum, ty_err};
@@ -31,7 +30,7 @@ use middle::ty::{ty_closure};
 use middle::ty::type_is_ty_var;
 use middle::subst::Subst;
 use middle::ty;
-use middle::typeck::CrateCtxt;
+use typeck::CrateCtxt;
 use middle::infer::combine::Combine;
 use middle::infer::InferCtxt;
 use middle::infer::{new_infer_ctxt, resolve_ivar, resolve_type};
@@ -477,27 +476,6 @@ impl<'a, 'tcx> CoherenceChecker<'a, 'tcx> {
     }
 }
 
-/// Substitutes the values for the receiver's type parameters that are found in method, leaving the
-/// method's type parameters intact.
-pub fn make_substs_for_receiver_types<'tcx>(tcx: &ty::ctxt<'tcx>,
-                                            trait_ref: &ty::TraitRef<'tcx>,
-                                            method: &ty::Method<'tcx>)
-                                            -> subst::Substs<'tcx>
-{
-    let meth_tps: Vec<Ty> =
-        method.generics.types.get_slice(subst::FnSpace)
-              .iter()
-              .map(|def| ty::mk_param_from_def(tcx, def))
-              .collect();
-    let meth_regions: Vec<ty::Region> =
-        method.generics.regions.get_slice(subst::FnSpace)
-              .iter()
-              .map(|def| ty::ReEarlyBound(def.def_id.node, def.space,
-                                          def.index, def.name))
-              .collect();
-    trait_ref.substs.clone().with_method(meth_tps, meth_regions)
-}
-
 fn subst_receiver_types_in_method_ty<'tcx>(tcx: &ty::ctxt<'tcx>,
                                            impl_id: ast::DefId,
                                            impl_poly_type: &ty::Polytype<'tcx>,
@@ -507,7 +485,7 @@ fn subst_receiver_types_in_method_ty<'tcx>(tcx: &ty::ctxt<'tcx>,
                                            provided_source: Option<ast::DefId>)
                                            -> ty::Method<'tcx>
 {
-    let combined_substs = make_substs_for_receiver_types(tcx, trait_ref, method);
+    let combined_substs = ty::make_substs_for_receiver_types(tcx, trait_ref, method);
 
     debug!("subst_receiver_types_in_method_ty: combined_substs={}",
            combined_substs.repr(tcx));

src/librustc/middle/typeck/collect.rs

@@ -43,13 +43,13 @@ use middle::ty::{ImplContainer, ImplOrTraitItemContainer, TraitContainer};
 use middle::ty::{Polytype};
 use middle::ty::{mod, Ty};
 use middle::ty_fold::TypeFolder;
-use middle::typeck::astconv::{AstConv, ty_of_arg};
-use middle::typeck::astconv::{ast_ty_to_ty, ast_region_to_region};
-use middle::typeck::astconv;
+use typeck::astconv::{AstConv, ty_of_arg};
+use typeck::astconv::{ast_ty_to_ty, ast_region_to_region};
+use typeck::astconv;
 use middle::infer;
-use middle::typeck::rscope::*;
-use middle::typeck::{CrateCtxt, lookup_def_tcx, no_params, write_ty_to_tcx};
-use middle::typeck;
+use typeck::rscope::*;
+use typeck::{CrateCtxt, lookup_def_tcx, no_params, write_ty_to_tcx};
+use typeck;
 use util::nodemap::{FnvHashMap, FnvHashSet};
 use util::ppaux;
 use util::ppaux::{Repr,UserString};

src/librustc/middle/typeck/mod.rs

@@ -76,32 +76,32 @@ use syntax::codemap::Span;
 use syntax::print::pprust::*;
 use syntax::{ast, ast_map, abi};
 
-pub mod check;
-pub mod rscope;
-pub mod astconv;
-pub mod collect;
-pub mod coherence;
-pub mod variance;
-
-pub struct TypeAndSubsts<'tcx> {
+mod check;
+mod rscope;
+mod astconv;
+mod collect;
+mod coherence;
+mod variance;
+
+struct TypeAndSubsts<'tcx> {
     pub substs: subst::Substs<'tcx>,
     pub ty: Ty<'tcx>,
 }
 
-pub struct CrateCtxt<'a, 'tcx: 'a> {
+struct CrateCtxt<'a, 'tcx: 'a> {
     // A mapping from method call sites to traits that have that method.
     trait_map: resolve::TraitMap,
     tcx: &'a ty::ctxt<'tcx>
 }
 
 // Functions that write types into the node type table
-pub fn write_ty_to_tcx<'tcx>(tcx: &ty::ctxt<'tcx>, node_id: ast::NodeId, ty: Ty<'tcx>) {
+fn write_ty_to_tcx<'tcx>(tcx: &ty::ctxt<'tcx>, node_id: ast::NodeId, ty: Ty<'tcx>) {
     debug!("write_ty_to_tcx({}, {})", node_id, ppaux::ty_to_string(tcx, ty));
     assert!(!ty::type_needs_infer(ty));
     tcx.node_types.borrow_mut().insert(node_id, ty);
 }
 
-pub fn write_substs_to_tcx<'tcx>(tcx: &ty::ctxt<'tcx>,
+fn write_substs_to_tcx<'tcx>(tcx: &ty::ctxt<'tcx>,
                                  node_id: ast::NodeId,
                                  item_substs: ty::ItemSubsts<'tcx>) {
     if !item_substs.is_noop() {
@@ -114,7 +114,7 @@ pub fn write_substs_to_tcx<'tcx>(tcx: &ty::ctxt<'tcx>,
         tcx.item_substs.borrow_mut().insert(node_id, item_substs);
     }
 }
-pub fn lookup_def_tcx(tcx:&ty::ctxt, sp: Span, id: ast::NodeId) -> def::Def {
+fn lookup_def_tcx(tcx:&ty::ctxt, sp: Span, id: ast::NodeId) -> def::Def {
     match tcx.def_map.borrow().get(&id) {
         Some(x) => x.clone(),
         _ => {
@@ -123,20 +123,20 @@ pub fn lookup_def_tcx(tcx:&ty::ctxt, sp: Span, id: ast::NodeId) -> def::Def {
     }
 }
 
-pub fn lookup_def_ccx(ccx: &CrateCtxt, sp: Span, id: ast::NodeId)
+fn lookup_def_ccx(ccx: &CrateCtxt, sp: Span, id: ast::NodeId)
                    -> def::Def {
     lookup_def_tcx(ccx.tcx, sp, id)
 }
 
-pub fn no_params<'tcx>(t: Ty<'tcx>) -> ty::Polytype<'tcx> {
+fn no_params<'tcx>(t: Ty<'tcx>) -> ty::Polytype<'tcx> {
     ty::Polytype {
         generics: ty::Generics {types: VecPerParamSpace::empty(),
                                 regions: VecPerParamSpace::empty()},
         ty: t
     }
 }
 
-pub fn require_same_types<'a, 'tcx>(tcx: &ty::ctxt<'tcx>,
+fn require_same_types<'a, 'tcx>(tcx: &ty::ctxt<'tcx>,
                                     maybe_infcx: Option<&infer::InferCtxt<'a, 'tcx>>,
                                     t1_is_expected: bool,
                                     span: Span,