rustc: de-@ ty::AutoAdjustment.

Author: eddyb

src/librustc/middle/astencode.rs

@@ -1062,8 +1062,8 @@ fn encode_side_tables_for_id(ecx: &e::EncodeContext,
         })
     }
 
-    for adj in tcx.adjustments.borrow().find(&id).iter() {
-        match ***adj {
+    for &adj in tcx.adjustments.borrow().find(&id).iter() {
+        match *adj {
             ty::AutoDerefRef(adj) => {
                 for autoderef in range(0, adj.autoderefs) {
                     let method_call = MethodCall::autoderef(id, autoderef as u32);
@@ -1093,7 +1093,7 @@ fn encode_side_tables_for_id(ecx: &e::EncodeContext,
         ebml_w.tag(c::tag_table_adjustments, |ebml_w| {
             ebml_w.id(id);
             ebml_w.tag(c::tag_table_val, |ebml_w| {
-                ebml_w.emit_auto_adjustment(ecx, **adj);
+                ebml_w.emit_auto_adjustment(ecx, adj);
             })
         })
     }
@@ -1403,7 +1403,7 @@ fn decode_side_tables(xcx: &ExtendedDecodeContext,
                         dcx.tcx.vtable_map.borrow_mut().insert(vtable_key, vtable_res);
                     }
                     c::tag_table_adjustments => {
-                        let adj: @ty::AutoAdjustment = @val_dsr.read_auto_adjustment(xcx);
+                        let adj: ty::AutoAdjustment = val_dsr.read_auto_adjustment(xcx);
                         dcx.tcx.adjustments.borrow_mut().insert(id, adj);
                     }
                     c::tag_table_capture_map => {

src/librustc/middle/borrowck/check_loans.rs

@@ -378,7 +378,7 @@ impl<'a> CheckLoanCtxt<'a> {
     pub fn check_assignment(&self, expr: &ast::Expr) {
         // We don't use cat_expr() here because we don't want to treat
         // auto-ref'd parameters in overloaded operators as rvalues.
-        let cmt = match self.bccx.tcx.adjustments.borrow().find_copy(&expr.id) {
+        let cmt = match self.bccx.tcx.adjustments.borrow().find(&expr.id) {
             None => self.bccx.cat_expr_unadjusted(expr),
             Some(adj) => self.bccx.cat_expr_autoderefd(expr, adj)
         };

src/librustc/middle/borrowck/gather_loans/mod.rs

@@ -177,7 +177,7 @@ fn gather_loans_in_expr(this: &mut GatherLoanCtxt,
 
     // If this expression is borrowed, have to ensure it remains valid:
     for &adjustments in tcx.adjustments.borrow().find(&ex.id).iter() {
-        this.guarantee_adjustments(ex, *adjustments);
+        this.guarantee_adjustments(ex, adjustments);
     }
 
     // If this expression is a move, gather it:

src/librustc/middle/borrowck/mod.rs

@@ -18,7 +18,7 @@ use middle::typeck;
 use middle::moves;
 use middle::dataflow::DataFlowContext;
 use middle::dataflow::DataFlowOperator;
-use util::nodemap::NodeSet;
+use util::nodemap::{NodeMap, NodeSet};
 use util::ppaux::{note_and_explain_region, Repr, UserString};
 
 use std::cell::{Cell, RefCell};
@@ -918,8 +918,8 @@ impl<'a> mc::Typer for &'a ty::ctxt {
         self.method_map.borrow().find(&method_call).map(|method| method.ty)
     }
 
-    fn adjustment(&mut self, id: ast::NodeId) -> Option<@ty::AutoAdjustment> {
-        self.adjustments.borrow().find_copy(&id)
+    fn adjustments<'a>(&'a self) -> &'a RefCell<NodeMap<ty::AutoAdjustment>> {
+        &self.adjustments
     }
 
     fn is_method_call(&mut self, id: ast::NodeId) -> bool {

src/librustc/middle/kind.rs

@@ -306,7 +306,7 @@ pub fn check_expr(cx: &mut Context, e: &Expr) {
     // Search for auto-adjustments to find trait coercions.
     match cx.tcx.adjustments.borrow().find(&e.id) {
         Some(adjustment) => {
-            match **adjustment {
+            match *adjustment {
                 ty::AutoObject(..) => {
                     let source_ty = ty::expr_ty(cx.tcx, e);
                     let target_ty = ty::expr_ty_adjusted(cx.tcx, e);

src/librustc/middle/lint.rs

@@ -1387,7 +1387,7 @@ fn check_unnecessary_allocation(cx: &Context, e: &ast::Expr) {
         cx.span_lint(UnnecessaryAllocation, e.span, msg);
     };
 
-    match cx.tcx.adjustments.borrow().find_copy(&e.id) {
+    match cx.tcx.adjustments.borrow().find(&e.id) {
         Some(adjustment) => {
             match *adjustment {
                 ty::AutoDerefRef(ty::AutoDerefRef { autoref, .. }) => {

src/librustc/middle/mem_categorization.rs

@@ -64,6 +64,7 @@
 
 use middle::ty;
 use middle::typeck;
+use util::nodemap::NodeMap;
 use util::ppaux::{ty_to_str, Repr};
 
 use syntax::ast::{MutImmutable, MutMutable};
@@ -72,6 +73,8 @@ use syntax::codemap::Span;
 use syntax::print::pprust;
 use syntax::parse::token;
 
+use std::cell::RefCell;
+
 #[deriving(Eq)]
 pub enum categorization {
     cat_rvalue(ty::Region),            // temporary val, argument is its scope
@@ -265,10 +268,10 @@ pub trait Typer {
     fn tcx<'a>(&'a self) -> &'a ty::ctxt;
     fn node_ty(&mut self, id: ast::NodeId) -> McResult<ty::t>;
     fn node_method_ty(&self, method_call: typeck::MethodCall) -> Option<ty::t>;
-    fn adjustment(&mut self, node_id: ast::NodeId) -> Option<@ty::AutoAdjustment>;
     fn is_method_call(&mut self, id: ast::NodeId) -> bool;
     fn temporary_scope(&mut self, rvalue_id: ast::NodeId) -> Option<ast::NodeId>;
     fn upvar_borrow(&mut self, upvar_id: ty::UpvarId) -> ty::UpvarBorrow;
+    fn adjustments<'a>(&'a self) -> &'a RefCell<NodeMap<ty::AutoAdjustment>>;
 }
 
 impl MutabilityCategory {
@@ -360,8 +363,8 @@ impl<TYPER:Typer> MemCategorizationContext<TYPER> {
 
     fn expr_ty_adjusted(&mut self, expr: &ast::Expr) -> McResult<ty::t> {
         let unadjusted_ty = if_ok!(self.expr_ty(expr));
-        let adjustment = self.adjustment(expr.id);
-        Ok(ty::adjust_ty(self.tcx(), expr.span, expr.id, unadjusted_ty, adjustment,
+        Ok(ty::adjust_ty(self.tcx(), expr.span, expr.id, unadjusted_ty,
+                         self.typer.adjustments().borrow().find(&expr.id),
                          |method_call| self.typer.node_method_ty(method_call)))
     }
 
@@ -374,7 +377,7 @@ impl<TYPER:Typer> MemCategorizationContext<TYPER> {
     }
 
     pub fn cat_expr(&mut self, expr: &ast::Expr) -> McResult<cmt> {
-        match self.adjustment(expr.id) {
+        match self.typer.adjustments().borrow().find(&expr.id) {
             None => {
                 // No adjustments.
                 self.cat_expr_unadjusted(expr)

src/librustc/middle/moves.rs

@@ -312,7 +312,7 @@ impl<'a> VisitContext<'a> {
         // reading the underlying expression, not moving it.
         let comp_mode = match self.tcx.adjustments.borrow().find(&expr.id) {
             Some(adjustment) => {
-                match **adjustment {
+                match *adjustment {
                     ty::AutoDerefRef(ty::AutoDerefRef {
                         autoref: Some(_),
                         ..

src/librustc/middle/trans/consts.rs

@@ -192,7 +192,7 @@ pub fn const_expr(cx: &CrateContext, e: &ast::Expr, is_local: bool) -> (ValueRef
     match opt_adj {
         None => { }
         Some(adj) => {
-            match *adj {
+            match adj {
                 ty::AutoAddEnv(ty::RegionTraitStore(ty::ReStatic, _)) => {
                     let def = ty::resolve_expr(cx.tcx(), e);
                     let wrapper = closure::get_wrapper_for_bare_fn(cx,

src/librustc/middle/trans/expr.rs

@@ -175,7 +175,7 @@ fn apply_adjustments<'a>(bcx: &'a Block<'a>,
     };
     debug!("unadjusted datum for expr {}: {}",
            expr.id, datum.to_str(bcx.ccx()));
-    match *adjustment {
+    match adjustment {
         AutoAddEnv(..) => {
             datum = unpack_datum!(bcx, add_env(bcx, expr, datum));
         }

src/librustc/middle/ty.rs

@@ -212,6 +212,7 @@ pub enum Variance {
     Bivariant,      // T<A> <: T<B>            -- e.g., unused type parameter
 }
 
+#[deriving(Clone)]
 pub enum AutoAdjustment {
     AutoAddEnv(ty::TraitStore),
     AutoDerefRef(AutoDerefRef),
@@ -221,13 +222,13 @@ pub enum AutoAdjustment {
                ty::substs /* Trait substitutions */)
 }
 
-#[deriving(Decodable, Encodable)]
+#[deriving(Clone, Decodable, Encodable)]
 pub struct AutoDerefRef {
     pub autoderefs: uint,
     pub autoref: Option<AutoRef>
 }
 
-#[deriving(Decodable, Encodable, Eq, Show)]
+#[deriving(Clone, Decodable, Encodable, Eq, Show)]
 pub enum AutoRef {
     /// Convert from T to &T
     AutoPtr(Region, ast::Mutability),
@@ -296,7 +297,7 @@ pub struct ctxt {
     pub ast_ty_to_ty_cache: RefCell<NodeMap<ast_ty_to_ty_cache_entry>>,
     pub enum_var_cache: RefCell<DefIdMap<@Vec<@VariantInfo> >>,
     pub ty_param_defs: RefCell<NodeMap<TypeParameterDef>>,
-    pub adjustments: RefCell<NodeMap<@AutoAdjustment>>,
+    pub adjustments: RefCell<NodeMap<AutoAdjustment>>,
     pub normalized_cache: RefCell<HashMap<t, t>>,
     pub lang_items: @middle::lang_items::LanguageItems,
     // A mapping of fake provided method def_ids to the default implementation
@@ -2808,11 +2809,9 @@ pub fn expr_ty_adjusted(cx: &ctxt, expr: &ast::Expr) -> t {
      * task at hand! -nmatsakis
      */
 
-    let unadjusted_ty = expr_ty(cx, expr);
-    let adjustment = cx.adjustments.borrow().find_copy(&expr.id);
-    adjust_ty(cx, expr.span, expr.id, unadjusted_ty, adjustment, |method_call| {
-        cx.method_map.borrow().find(&method_call).map(|method| method.ty)
-    })
+    adjust_ty(cx, expr.span, expr.id, expr_ty(cx, expr),
+              cx.adjustments.borrow().find(&expr.id),
+              |method_call| cx.method_map.borrow().find(&method_call).map(|method| method.ty))
 }
 
 pub fn expr_span(cx: &ctxt, id: NodeId) -> Span {
@@ -2857,7 +2856,7 @@ pub fn adjust_ty(cx: &ctxt,
                  span: Span,
                  expr_id: ast::NodeId,
                  unadjusted_ty: ty::t,
-                 adjustment: Option<@AutoAdjustment>,
+                 adjustment: Option<&AutoAdjustment>,
                  method_type: |typeck::MethodCall| -> Option<ty::t>)
                  -> ty::t {
     /*! See `expr_ty_adjusted` */

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

@@ -715,7 +715,7 @@ impl<'a> LookupContext<'a> {
         // an explicit adjustment, but rather we hardwire the single deref
         // that occurs in trans and mem_categorization.
         let adjustment = match self.self_expr {
-            Some(expr) => Some((expr.id, @ty::AutoDerefRef(auto_deref_ref))),
+            Some(expr) => Some((expr.id, ty::AutoDerefRef(auto_deref_ref))),
             None => return None
         };
 
@@ -962,7 +962,7 @@ impl<'a> LookupContext<'a> {
                         Some(self_expr_id) => {
                             self.fcx.write_adjustment(
                                 self_expr_id,
-                                @ty::AutoDerefRef(ty::AutoDerefRef {
+                                ty::AutoDerefRef(ty::AutoDerefRef {
                                     autoderefs: autoderefs,
                                     autoref: Some(kind(region, *mutbl))
                                 }));

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

@@ -161,7 +161,7 @@ pub struct Inherited<'a> {
     // Temporary tables:
     node_types: RefCell<NodeMap<ty::t>>,
     node_type_substs: RefCell<NodeMap<ty::substs>>,
-    adjustments: RefCell<NodeMap<@ty::AutoAdjustment>>,
+    adjustments: RefCell<NodeMap<ty::AutoAdjustment>>,
     method_map: MethodMap,
     vtable_map: vtable_map,
     upvar_borrow_map: RefCell<ty::UpvarBorrowMap>,
@@ -1076,15 +1076,15 @@ impl<'a> FnCtxt<'a> {
         if derefs == 0 { return; }
         self.write_adjustment(
             node_id,
-            @ty::AutoDerefRef(ty::AutoDerefRef {
+            ty::AutoDerefRef(ty::AutoDerefRef {
                 autoderefs: derefs,
                 autoref: None })
         );
     }
 
     pub fn write_adjustment(&self,
                             node_id: ast::NodeId,
-                            adj: @ty::AutoAdjustment) {
+                            adj: ty::AutoAdjustment) {
         debug!("write_adjustment(node_id={:?}, adj={:?})", node_id, adj);
         self.inh.adjustments.borrow_mut().insert(node_id, adj);
     }

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

@@ -131,6 +131,7 @@ use middle::typeck::infer::resolve_type;
 use middle::typeck::infer;
 use middle::typeck::MethodCall;
 use middle::pat_util;
+use util::nodemap::NodeMap;
 use util::ppaux::{ty_to_str, region_to_str, Repr};
 
 use syntax::ast::{DefArg, DefBinding, DefLocal, DefUpvar};
@@ -140,6 +141,8 @@ use syntax::codemap::Span;
 use syntax::visit;
 use syntax::visit::Visitor;
 
+use std::cell::RefCell;
+
 // If mem categorization results in an error, it's because the type
 // check failed (or will fail, when the error is uncovered and
 // reported during writeback). In this case, we just ignore this part
@@ -252,8 +255,8 @@ impl<'a> Rcx<'a> {
             ty_unadjusted
         } else {
             let tcx = self.fcx.tcx();
-            let adjustment = self.fcx.inh.adjustments.borrow().find_copy(&expr.id);
-            ty::adjust_ty(tcx, expr.span, expr.id, ty_unadjusted, adjustment,
+            ty::adjust_ty(tcx, expr.span, expr.id, ty_unadjusted,
+                          self.fcx.inh.adjustments.borrow().find(&expr.id),
                           |method_call| self.resolve_method_type(method_call))
         }
     }
@@ -273,8 +276,8 @@ impl<'a, 'b> mc::Typer for &'a mut Rcx<'b> {
         self.resolve_method_type(method_call)
     }
 
-    fn adjustment(&mut self, id: ast::NodeId) -> Option<@ty::AutoAdjustment> {
-        self.fcx.inh.adjustments.borrow().find_copy(&id)
+    fn adjustments<'a>(&'a self) -> &'a RefCell<NodeMap<ty::AutoAdjustment>> {
+        &self.fcx.inh.adjustments
     }
 
     fn is_method_call(&mut self, id: ast::NodeId) -> bool {
@@ -402,7 +405,7 @@ fn visit_expr(rcx: &mut Rcx, expr: &ast::Expr) {
     // Check any autoderefs or autorefs that appear.
     for &adjustment in rcx.fcx.inh.adjustments.borrow().find(&expr.id).iter() {
         debug!("adjustment={:?}", adjustment);
-        match **adjustment {
+        match *adjustment {
             ty::AutoDerefRef(ty::AutoDerefRef {autoderefs, autoref: opt_autoref}) => {
                 let expr_ty = rcx.resolve_node_type(expr.id);
                 constrain_autoderefs(rcx, expr, autoderefs, expr_ty);
@@ -960,13 +963,13 @@ fn constrain_regions_in_type_of_node(
     // is going to fail anyway, so just stop here and let typeck
     // report errors later on in the writeback phase.
     let ty0 = rcx.resolve_node_type(id);
-    let adjustment = rcx.fcx.inh.adjustments.borrow().find_copy(&id);
-    let ty = ty::adjust_ty(tcx, origin.span(), id, ty0, adjustment,
+    let ty = ty::adjust_ty(tcx, origin.span(), id, ty0,
+                           rcx.fcx.inh.adjustments.borrow().find(&id),
                            |method_call| rcx.resolve_method_type(method_call));
     debug!("constrain_regions_in_type_of_node(\
-            ty={}, ty0={}, id={}, minimum_lifetime={:?}, adjustment={:?})",
+            ty={}, ty0={}, id={}, minimum_lifetime={:?})",
            ty_to_str(tcx, ty), ty_to_str(tcx, ty0),
-           id, minimum_lifetime, adjustment);
+           id, minimum_lifetime);
     constrain_regions_in_type(rcx, minimum_lifetime, origin, ty)
 }
 

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

@@ -682,7 +682,7 @@ pub fn early_resolve_expr(ex: &ast::Expr, fcx: &FnCtxt, is_early: bool) {
     // Search for auto-adjustments to find trait coercions
     match fcx.inh.adjustments.borrow().find(&ex.id) {
         Some(adjustment) => {
-            match **adjustment {
+            match *adjustment {
                 AutoDerefRef(adj) => {
                     for autoderef in range(0, adj.autoderefs) {
                         let method_call = MethodCall::autoderef(ex.id, autoderef as u32);

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

@@ -127,7 +127,7 @@ fn resolve_type_vars_for_node(wbcx: &mut WbCtxt, sp: Span, id: ast::NodeId) {
         None => None,
 
         Some(adjustment) => {
-            Some(match *adjustment {
+            Some(match adjustment {
                 ty::AutoAddEnv(store) => {
                     let r = match store {
                         ty::RegionTraitStore(r, _) => r,
@@ -205,7 +205,7 @@ fn resolve_type_vars_for_node(wbcx: &mut WbCtxt, sp: Span, id: ast::NodeId) {
            id, resolved_adj);
     match resolved_adj {
         Some(adj) => {
-            tcx.adjustments.borrow_mut().insert(id, @adj);
+            tcx.adjustments.borrow_mut().insert(id, adj);
         }
         None => {}
     }