Add support for the new function-type syntax.

pkg/compiler/lib/src/diagnostics/messages.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.
 
 /**
  * The messages in this file should meet the following guide lines:
  *
  * 1. The message should be a complete sentence starting with an uppercase
  * letter, and ending with a period.
  *
@@ skipping 257 matching lines @@
   INVALID_OVERRIDE_GETTER_WITH_FIELD,
   INVALID_OVERRIDE_METHOD,
   INVALID_OVERRIDE_SETTER,
   INVALID_OVERRIDE_SETTER_WITH_FIELD,
   INVALID_PACKAGE_CONFIG,
   INVALID_PACKAGE_URI,
   INVALID_PARAMETER,
   INVALID_RECEIVER_IN_INITIALIZER,
   INVALID_SOURCE_FILE_LOCATION,
   INVALID_SYMBOL,
+  INVALID_INLINE_FUNCTION_TYPE,
   INVALID_SYNC_MODIFIER,
   INVALID_TYPE_VARIABLE_BOUND,
   INVALID_UNNAMED_CONSTRUCTOR_NAME,
   INVALID_URI,
   INVALID_USE_OF_SUPER,
   INVALID_YIELD,
   JS_INTEROP_CLASS_CANNOT_EXTEND_DART_CLASS,
   JS_INTEROP_CLASS_NON_EXTERNAL_MEMBER,
   JS_INTEROP_INDEX_NOT_SUPPORTED,
   JS_INTEROP_METHOD_WITH_NAMED_ARGUMENTS,
@@ skipping 3024 matching lines @@
 
       MessageKind.HIDDEN_HINTS: const MessageTemplate(
           MessageKind.HIDDEN_HINTS, "#{hints} hint(s) suppressed in #{uri}."),
 
       MessageKind.PREAMBLE: const MessageTemplate(
           MessageKind.PREAMBLE,
           "When run on the command-line, the compiled output might"
           " require a preamble file located in:\n"
           "  <sdk>/lib/_internal/js_runtime/lib/preambles."),
 
+      MessageKind.INVALID_INLINE_FUNCTION_TYPE: const MessageTemplate(
+          MessageKind.INVALID_INLINE_FUNCTION_TYPE,
+          "Invalid inline function type.",
+          howToFix: "Try changing the inline function type (as in 'int f()') to"
+             " a prefixed function type using the `Function` keyword (as in "
+             "'int Function() f').",
+          examples:
+              const ["typedef F = Function(int f(String x)); main() { F f; }"],
+      ),
+
       MessageKind.INVALID_SYNC_MODIFIER: const MessageTemplate(
           MessageKind.INVALID_SYNC_MODIFIER, "Invalid modifier 'sync'.",
           howToFix: "Try replacing 'sync' with 'sync*'.",
           examples: const ["main() sync {}"]),
 
       MessageKind.INVALID_AWAIT_FOR: const MessageTemplate(
           MessageKind.INVALID_AWAIT_FOR,
           "'await' is only supported on for-in loops.",
           howToFix: "Try rewriting the loop as a for-in loop or removing the "
               "'await' keyword.",
@@ skipping 475 matching lines @@
   static String convertToString(value) {
     if (value is ErrorToken) {
       // Shouldn't happen.
       return value.assertionMessage;
     } else if (value is Token) {
       value = value.value;
     }
     return '$value';
   }
 }