allow dep-graph assertions on fields

Author: nikomatsakis

src/librustc_incremental/assert_dep_graph.rs

@@ -51,7 +51,7 @@ use rustc::ty::TyCtxt;
 use rustc_data_structures::fx::FxHashSet;
 use rustc_data_structures::graph::{Direction, INCOMING, OUTGOING, NodeIndex};
 use rustc::hir;
-use rustc::hir::itemlikevisit::ItemLikeVisitor;
+use rustc::hir::intravisit::{self, NestedVisitorMap, Visitor};
 use rustc::ich::{ATTR_IF_THIS_CHANGED, ATTR_THEN_THIS_WOULD_NEED};
 use graphviz::IntoCow;
 use std::env;
@@ -80,7 +80,7 @@ pub fn assert_dep_graph<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>) {
                                           if_this_changed: vec![],
                                           then_this_would_need: vec![] };
         visitor.process_attrs(ast::CRATE_NODE_ID, &tcx.hir.krate().attrs);
-        tcx.hir.krate().visit_all_item_likes(&mut visitor);
+        tcx.hir.krate().visit_all_item_likes(&mut visitor.as_deep_visitor());
         (visitor.if_this_changed, visitor.then_this_would_need)
     };
 
@@ -166,17 +166,29 @@ impl<'a, 'tcx> IfThisChanged<'a, 'tcx> {
     }
 }
 
-impl<'a, 'tcx> ItemLikeVisitor<'tcx> for IfThisChanged<'a, 'tcx> {
+impl<'a, 'tcx> Visitor<'tcx> for IfThisChanged<'a, 'tcx> {
+    fn nested_visit_map<'this>(&'this mut self) -> NestedVisitorMap<'this, 'tcx> {
+        NestedVisitorMap::OnlyBodies(&self.tcx.hir)
+    }
+
     fn visit_item(&mut self, item: &'tcx hir::Item) {
         self.process_attrs(item.id, &item.attrs);
+        intravisit::walk_item(self, item);
     }
 
     fn visit_trait_item(&mut self, trait_item: &'tcx hir::TraitItem) {
         self.process_attrs(trait_item.id, &trait_item.attrs);
+        intravisit::walk_trait_item(self, trait_item);
     }
 
     fn visit_impl_item(&mut self, impl_item: &'tcx hir::ImplItem) {
         self.process_attrs(impl_item.id, &impl_item.attrs);
+        intravisit::walk_impl_item(self, impl_item);
+    }
+
+    fn visit_struct_field(&mut self, s: &'tcx hir::StructField) {
+        self.process_attrs(s.id, &s.attrs);
+        intravisit::walk_struct_field(self, s);
     }
 }