Rename upvar_list to closure_captures

As part of supporting RFC 2229, we will be capturing all the places that
are mentioned in a closure. Currently the upvar_list field gives access
to a FxIndexMap<HirId, Upvar> map. Eventually this will change, with the
upvar_list having a more general structure that expresses captured
paths, not just the mentioned upvars. We will make those changes in
subsequent PRs.

This commit modifies the name of the upvar_list map to closure_captures
in TypeckTables.

Co-authored-by: Dhruv Jauhar <dhruvjhr@gmail.com>
Co-authored-by: Aman Arora <me@aman-arora.com>

src/librustc_middle/ty/context.rs

@@ -419,7 +419,7 @@ pub struct TypeckTables<'tcx> {
     /// The upvarID contains the HIR node ID and it also contains the full path
     /// leading to the member of the struct or tuple that is used instead of the
     /// entire variable.
-    pub upvar_list: ty::UpvarListMap,
+    pub closure_captures: ty::UpvarListMap,
 
     /// Stores the type, expression, span and optional scope span of all types
     /// that are live across the yield of this generator (if a generator).
@@ -447,7 +447,7 @@ impl<'tcx> TypeckTables<'tcx> {
             used_trait_imports: Lrc::new(Default::default()),
             tainted_by_errors: None,
             concrete_opaque_types: Default::default(),
-            upvar_list: Default::default(),
+            closure_captures: Default::default(),
             generator_interior_types: Default::default(),
         }
     }
@@ -688,7 +688,7 @@ impl<'a, 'tcx> HashStable<StableHashingContext<'a>> for TypeckTables<'tcx> {
             ref used_trait_imports,
             tainted_by_errors,
             ref concrete_opaque_types,
-            ref upvar_list,
+            ref closure_captures,
             ref generator_interior_types,
         } = *self;
 
@@ -721,7 +721,7 @@ impl<'a, 'tcx> HashStable<StableHashingContext<'a>> for TypeckTables<'tcx> {
             used_trait_imports.hash_stable(hcx, hasher);
             tainted_by_errors.hash_stable(hcx, hasher);
             concrete_opaque_types.hash_stable(hcx, hasher);
-            upvar_list.hash_stable(hcx, hasher);
+            closure_captures.hash_stable(hcx, hasher);
             generator_interior_types.hash_stable(hcx, hasher);
         })
     }

src/librustc_mir/borrow_check/mod.rs

@@ -142,7 +142,7 @@ fn do_mir_borrowck<'a, 'tcx>(
         infcx.set_tainted_by_errors();
     }
     let upvars: Vec<_> = tables
-        .upvar_list
+        .closure_captures
         .get(&def_id.to_def_id())
         .into_iter()
         .flat_map(|v| v.values())

src/librustc_mir/interpret/validity.rs

@@ -227,7 +227,7 @@ impl<'rt, 'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> ValidityVisitor<'rt, 'mir, '
                 let mut name = None;
                 if let Some(def_id) = def_id.as_local() {
                     let tables = self.ecx.tcx.typeck_tables_of(def_id);
-                    if let Some(upvars) = tables.upvar_list.get(&def_id.to_def_id()) {
+                    if let Some(upvars) = tables.closure_captures.get(&def_id.to_def_id()) {
                         // Sometimes the index is beyond the number of upvars (seen
                         // for a generator).
                         if let Some((&var_hir_id, _)) = upvars.get_index(field) {

src/librustc_mir_build/build/mod.rs

@@ -790,11 +790,11 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
         let hir_tables = self.hir.tables();
 
         // In analyze_closure() in upvar.rs we gathered a list of upvars used by a
-        // closure and we stored in a map called upvar_list in TypeckTables indexed
+        // indexed closure and we stored in a map called closure_captures in TypeckTables
         // with the closure's DefId. Here, we run through that vec of UpvarIds for
         // the given closure and use the necessary information to create upvar
         // debuginfo and to fill `self.upvar_mutbls`.
-        if let Some(upvars) = hir_tables.upvar_list.get(&fn_def_id) {
+        if let Some(upvars) = hir_tables.closure_captures.get(&fn_def_id) {
             let closure_env_arg = Local::new(1);
             let mut closure_env_projs = vec![];
             let mut closure_ty = self.local_decls[closure_env_arg].ty;

src/librustc_mir_build/hair/cx/expr.rs

@@ -884,7 +884,7 @@ fn convert_var<'tcx>(
 ) -> ExprKind<'tcx> {
     let upvar_index = cx
         .tables()
-        .upvar_list
+        .closure_captures
         .get(&cx.body_owner)
         .and_then(|upvars| upvars.get_full(&var_hir_id).map(|(i, _, _)| i));
 

src/librustc_typeck/check/upvar.rs

@@ -112,7 +112,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         };
 
         if let Some(upvars) = self.tcx.upvars_mentioned(closure_def_id) {
-            let mut upvar_list: FxIndexMap<hir::HirId, ty::UpvarId> =
+            let mut closure_captures: FxIndexMap<hir::HirId, ty::UpvarId> =
                 FxIndexMap::with_capacity_and_hasher(upvars.len(), Default::default());
             for (&var_hir_id, _) in upvars.iter() {
                 let upvar_id = ty::UpvarId {
@@ -122,7 +122,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                 debug!("seed upvar_id {:?}", upvar_id);
                 // Adding the upvar Id to the list of Upvars, which will be added
                 // to the map for the closure at the end of the for loop.
-                upvar_list.insert(var_hir_id, upvar_id);
+                closure_captures.insert(var_hir_id, upvar_id);
 
                 let capture_kind = match capture_clause {
                     hir::CaptureBy::Value => ty::UpvarCapture::ByValue,
@@ -140,8 +140,8 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
             // Add the vector of upvars to the map keyed with the closure id.
             // This gives us an easier access to them without having to call
             // tcx.upvars again..
-            if !upvar_list.is_empty() {
-                self.tables.borrow_mut().upvar_list.insert(closure_def_id, upvar_list);
+            if !closure_captures.is_empty() {
+                self.tables.borrow_mut().closure_captures.insert(closure_def_id, closure_captures);
             }
         }
 

src/librustc_typeck/check/writeback.rs

@@ -74,8 +74,8 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         debug!("used_trait_imports({:?}) = {:?}", item_def_id, used_trait_imports);
         wbcx.tables.used_trait_imports = used_trait_imports;
 
-        wbcx.tables.upvar_list =
-            mem::replace(&mut self.tables.borrow_mut().upvar_list, Default::default());
+        wbcx.tables.closure_captures =
+            mem::replace(&mut self.tables.borrow_mut().closure_captures, Default::default());
 
         if self.is_tainted_by_errors() {
             // FIXME(eddyb) keep track of `ErrorReported` from where the error was emitted.