Find diagnostic locations for use in new compiler API.

dart/frog/leg/tree/nodes.dart

 // Copyright (c) 2011, 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.
 
 interface Visitor<R> {
   R visitBlock(Block node);
   R visitBreakStatement(BreakStatement node);
   R visitCatchBlock(CatchBlock node);
   R visitClassNode(ClassNode node);
   R visitConditional(Conditional node);
@@ skipping 244 matching lines @@
     if (isPrefix && !isIndex) return selector.getBeginToken();
     return firstBeginToken(receiver, selector);
   }
 
   Token getEndToken() {
     if (isPrefix) {
       if (receiver !== null) return receiver.getEndToken();
       if (selector !== null) return selector.getEndToken();
       return null;
     }
-    if (argumentsNode !== null) return argumentsNode.getEndToken();
+    if (!isPostfix && argumentsNode !== null) {
+      return argumentsNode.getEndToken();
+    }
     if (selector !== null) return selector.getEndToken();
     return receiver.getBeginToken();
   }
 
   Send copyWithReceiver(Node newReceiver) {
     assert(receiver === null);
     return new Send(newReceiver, selector, argumentsNode);
   }
 }
 
@@ skipping 295 matching lines @@
   }
 
   Token getBeginToken() {
     Token token = firstBeginToken(modifiers, returnType);
     if (token !== null) return token;
     if (getOrSet !== null) return getOrSet;
     return firstBeginToken(name, parameters);
   }
 
   Token getEndToken() {
-    return (body === null) ? parameters.getEndToken() : body.getEndToken();
+    Token token = (body === null) ? null : body.getEndToken();
+    token = (token === null) ? parameters.getEndToken() : token;
+    return (token === null) ? name.getEndToken() : token;
   }
 }
 
 typedef void DecodeErrorHandler(Token token, var error);
 
 class Literal<T> extends Expression {
   final Token token;
   final DecodeErrorHandler handler;
 
   Literal(Token this.token, DecodeErrorHandler this.handler);
@@ skipping 1049 matching lines @@
   visitChildren(Visitor visitor) {
     tryBlock.accept(visitor);
     catchBlocks.accept(visitor);
     if (finallyBlock !== null) finallyBlock.accept(visitor);
   }
 
   Token getBeginToken() => tryKeyword;
 
   Token getEndToken() {
     if (finallyBlock !== null) return finallyBlock.getEndToken();
-    return catchBlocks.getEndToken();
+    if (!catchBlocks.isEmpty()) return catchBlocks.getEndToken();
+    return tryBlock.getEndToken();
   }
 }
 
 class CatchBlock extends Node {
   final NodeList formals;
   final Block block;
 
   final catchKeyword;
 
   CatchBlock(this.formals, this.block, this.catchKeyword);
@@ skipping 40 matching lines @@
   static bool isConstructorRedirect(Send node) {
     return (node.receiver === null &&
             node.selector.asIdentifier() !== null &&
             node.selector.asIdentifier().isThis()) ||
            (node.receiver !== null &&
             node.receiver.asIdentifier() !== null &&
             node.receiver.asIdentifier().isThis() &&
             node.selector.asIdentifier() !== null);
   }
 }