Refactor common logic of SsaBuilder.visitSend.

lib/compiler/implementation/resolved_visitor.dart

+// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+class ResolvedVisitor<R> implements Visitor<R> {
+  TreeElements elements;
+
+  ResolvedVisitor(this.elements);
+
+  R visitSend(Send node) {
+    if (node.isSuperCall) {
+      return visitSuperSend(node);
+    } else if (node.isOperator) {
+      return visitOperatorSend(node);
+    } else if (node.isPropertyAccess) {
+      return visitGetterSend(node);
+    } else if (Elements.isClosureSend(node, elements)) {
+      return visitClosureSend(node);
+    } else {
+      Element element = elements[node];
+      if (element === null) {
+        // Example: f() with 'f' unbound.
+        // This can only happen inside an instance method.
+        return visitDynamicSend(node);
+      } else if (element.kind == ElementKind.CLASS) {
+        internalError("Cannot generate code for send", node: node);
+      } else if (element.isInstanceMember()) {
+        // Example: f() with 'f' bound to instance method.
+        return visitDynamicSend(node);
+      } else if (element.kind === ElementKind.FOREIGN) {
+        return visitForeignSend(node);
+      } else if (!element.isInstanceMember()) {
+        // Example: A.f() or f() with 'f' bound to a static function.
+        // Also includes new A() or new A.named() which is treated like a
+        // static call to a factory.
+        return visitStaticSend(node);
+      } else {
+        internalError("Cannot generate code for send", node: node);
+      }
+    }
+  }
+
+  abstract R visitSuperSend(Send node);
+  abstract R visitOperatorSend(Send node);
+  abstract R visitGetterSend(Send node);
+  abstract R visitClosureSend(Send node);
+  abstract R visitDynamicSend(Send node);
+  abstract R visitForeignSend(Send node);
+  abstract R visitStaticSend(Send node);
+
+  abstract void internalError(String reason, [Node node]);
+}