save-analysis: api-ify method calls

Author: Nick Cameron

src/librustc_trans/save/dump_csv.rs

@@ -886,18 +886,14 @@ impl <'l, 'tcx> DumpCsvVisitor<'l, 'tcx> {
     fn process_method_call(&mut self,
                            ex: &ast::Expr,
                            args: &Vec<P<ast::Expr>>) {
-        let method_call = ty::MethodCall::expr(ex.id);
-        let method_id = self.tcx.tables.borrow().method_map[&method_call].def_id;
-        let (def_id, decl_id) = match self.tcx.impl_or_trait_item(method_id).container() {
-            ty::ImplContainer(_) => (Some(method_id), None),
-            ty::TraitContainer(_) => (None, Some(method_id))
-        };
-        let sub_span = self.span.sub_span_for_meth_name(ex.span);
-        self.fmt.meth_call_str(ex.span,
-                               sub_span,
-                               def_id,
-                               decl_id,
-                               self.cur_scope);
+        if let Some(call_data) = self.save_ctxt.get_expr_data(ex) {
+            down_cast_data!(call_data, MethodCallData, self, ex.span);
+            self.fmt.meth_call_str(ex.span,
+                                   Some(call_data.span),
+                                   call_data.ref_id,
+                                   call_data.decl_id,
+                                   call_data.scope);
+        }
 
         // walk receiver and args
         visit::walk_exprs(self, &args);

src/librustc_trans/save/mod.rs

@@ -61,6 +61,8 @@ pub enum Data {
     VariableRefData(VariableRefData),
     /// Data for a reference to a type or trait.
     TypeRefData(TypeRefData),
+    /// Data about a method call.
+    MethodCallData(MethodCallData),
 }
 
 /// Data for all kinds of functions and methods.
@@ -137,6 +139,16 @@ pub struct TypeRefData {
     pub ref_id: DefId,
 }
 
+/// Data about a method call.
+#[derive(Debug)]
+pub struct MethodCallData {
+    pub span: Span,
+    pub scope: NodeId,
+    pub ref_id: Option<DefId>,
+    pub decl_id: Option<DefId>,
+}
+
+
 
 impl<'l, 'tcx: 'l> SaveContext<'l, 'tcx> {
     pub fn new(tcx: &'l ty::ctxt<'tcx>,
@@ -372,6 +384,21 @@ impl<'l, 'tcx: 'l> SaveContext<'l, 'tcx> {
                     }
                 }
             }
+            ast::ExprMethodCall(..) => {
+                let method_call = ty::MethodCall::expr(expr.id);
+                let method_id = self.tcx.tables.borrow().method_map[&method_call].def_id;
+                let (def_id, decl_id) = match self.tcx.impl_or_trait_item(method_id).container() {
+                    ty::ImplContainer(_) => (Some(method_id), None),
+                    ty::TraitContainer(_) => (None, Some(method_id))
+                };
+                let sub_span = self.span_utils.sub_span_for_meth_name(expr.span);
+                Some(Data::MethodCallData(MethodCallData {
+                    span: sub_span.unwrap(),
+                    scope: self.tcx.map.get_enclosing_scope(expr.id).unwrap_or(0),
+                    ref_id: def_id,
+                    decl_id: decl_id,                    
+                }))
+            }
             _ => {
                 // FIXME
                 unimplemented!();