Formatter fixes (symbols, natives, function type aliases, oh my).

pkg/analyzer/lib/src/services/formatter_impl.dart

 // Copyright (c) 2013, 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.
 
 library formatter_impl;
 
 import 'dart:math';
 
 import 'package:analyzer/analyzer.dart';
 import 'package:analyzer/src/generated/java_core.dart' show CharSequence;
@@ skipping 488 matching lines @@
     visitNodes(node.metadata, followedBy: newlines);
     modifier(node.abstractKeyword);
     token(node.classKeyword);
     space();
     visit(node.name);
     allowContinuedLines((){
       visit(node.typeParameters);
       visitNode(node.extendsClause, precededBy: space);
       visitNode(node.withClause, precededBy: space);
       visitNode(node.implementsClause, precededBy: space);
+      visitNode(node.nativeClause, precededBy: space);
       space();
     });
     token(node.leftBracket);
     indent();
     visitNodes(node.members, precededBy: newlines, separatedBy: newlines);
     unindent();
     newlines();
     token(node.rightBracket);
   }
 
@@ skipping 299 matching lines @@
     visit(node.body);
   }
 
   visitFunctionDeclaration(FunctionDeclaration node) {
     preserveLeadingNewlines();
     visitNodes(node.metadata, followedBy: newlines);
     modifier(node.externalKeyword);
     //TODO(pquitslund): remove this workaround once setter functions
     //have their return types properly set (dartbug.com/15914)
     if (node.returnType == null && node.propertyKeyword != null) {
-      modifier(node.propertyKeyword.previous);
+      var previous = node.propertyKeyword.previous;
+      if (previous is KeywordToken && previous.keyword == Keyword.VOID) {
+        modifier(previous);
+      }
     } else {
       visitNode(node.returnType, followedBy: space);
     }
     modifier(node.propertyKeyword);
     visit(node.name);
     visit(node.functionExpression);
   }
 
   visitFunctionDeclarationStatement(FunctionDeclarationStatement node) {
     visit(node.functionDeclaration);
   }
 
   visitFunctionExpression(FunctionExpression node) {
     visit(node.parameters);
     if (node.body is! EmptyFunctionBody) {
       space();
     }
     visit(node.body);
   }
 
   visitFunctionExpressionInvocation(FunctionExpressionInvocation node) {
     visit(node.function);
     visit(node.argumentList);
   }
 
   visitFunctionTypeAlias(FunctionTypeAlias node) {
+    visitNodes(node.metadata, separatedBy: newlines, followedBy: newlines);
     token(node.keyword);
     space();
     visitNode(node.returnType, followedBy: space);
     visit(node.name);
     visit(node.typeParameters);
     visit(node.parameters);
     token(node.semicolon);
   }
 
   visitFunctionTypedFormalParameter(FunctionTypedFormalParameter node) {
@@ skipping 333 matching lines @@
     space();
     token(node.leftBracket);
     indent();
     newlines();
     visitNodes(node.members, separatedBy: newlines, followedBy: newlines);
     unindent();
     token(node.rightBracket);
   }
 
   visitSymbolLiteral(SymbolLiteral node) {
-     // No-op ?
+    token(node.poundSign);
+    var components = node.components;
+    var size = components.length;
+    for (var component in components) {
+      // The '.' separator
+      if (component.previous.lexeme == '.') {
+        token(component.previous);
+      }
+      token(component);
+    }
   }
 
   visitThisExpression(ThisExpression node) {
     token(node.keyword);
   }
 
   visitThrowExpression(ThrowExpression node) {
     token(node.keyword);
     space();
     visit(node.expression);
@@ skipping 435 matching lines @@
     var lastLine =
         lineInfo.getLocation(lastOffset).lineNumber;
     var currentLine =
         lineInfo.getLocation(currentOffset).lineNumber;
     return currentLine - lastLine;
   }
 
   String toString() => writer.toString();
 
 }