Improve parsing of function expressions.

pkg/front_end/lib/src/fasta/fasta_codes_generated.dart

Index: pkg/front_end/lib/src/fasta/fasta_codes_generated.dart
diff --git a/pkg/front_end/lib/src/fasta/fasta_codes_generated.dart b/pkg/front_end/lib/src/fasta/fasta_codes_generated.dart
index b8db587081517ab8c2372d42f32f1a4336946ba7..5d96d535bc8349cf51efdce20ab8f9c4d62051de 100644
--- a/pkg/front_end/lib/src/fasta/fasta_codes_generated.dart
+++ b/pkg/front_end/lib/src/fasta/fasta_codes_generated.dart
@@ -168,6 +168,16 @@ const MessageCode messageYieldNotGenerator = const MessageCode(
     dart2jsCode: "*ignored*",
     message: r"""'yield' can only be used in 'sync*' or 'async*' methods.""");
 
+// DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+const Code<Null> codeReturnTypeFunctionExpression =
+    messageReturnTypeFunctionExpression;
+
+// DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+const MessageCode messageReturnTypeFunctionExpression = const MessageCode(
+    "ReturnTypeFunctionExpression",
+    dart2jsCode: "*ignored*",
+    message: r"""A function expression can't have a return type.""");
+
 // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
 const Code<Null> codeSetterNotSync = messageSetterNotSync;
 
@@ -894,6 +904,15 @@ Message _withArgumentsExpectedButGot(String string) {
       arguments: {'string': string});
 }
 
+// DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+const Code<Null> codeNamedFunctionExpression = messageNamedFunctionExpression;
+
+// DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+const MessageCode messageNamedFunctionExpression = const MessageCode(
+    "NamedFunctionExpression",
+    dart2jsCode: "*ignored*",
+    message: r"""A function expression can't have a name.""");
+
 // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
 const Code<Null> codeConstFieldWithoutInitializer =
     messageConstFieldWithoutInitializer;