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 9a8d72fae6b176e5ac4ea1b4add3d53465922919..8c754c1859a9b5e806a3e4cacbc5fbfca1c75534 100644
--- a/pkg/front_end/lib/src/fasta/fasta_codes_generated.dart
+++ b/pkg/front_end/lib/src/fasta/fasta_codes_generated.dart
@@ -173,6 +173,24 @@ FastaMessage _formatYieldNotGenerator(Uri uri, int charOffset) {
       arguments: {});
 }
 
+// DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+const FastaCode<_ReturnTypeFunctionExpression>
+    codeReturnTypeFunctionExpression =
+    const FastaCode<_ReturnTypeFunctionExpression>(
+        "ReturnTypeFunctionExpression",
+        template: r"A function expression can't have a return type.",
+        dart2jsCode: "*ignored*",
+        format: _formatReturnTypeFunctionExpression);
+
+typedef FastaMessage _ReturnTypeFunctionExpression(Uri uri, int charOffset);
+
+// DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+FastaMessage _formatReturnTypeFunctionExpression(Uri uri, int charOffset) {
+  return new FastaMessage(uri, charOffset, codeReturnTypeFunctionExpression,
+      message: "A function expression can't have a return type.",
+      arguments: {});
+}
+
 // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
 const FastaCode<_SetterNotSync> codeSetterNotSync =
     const FastaCode<_SetterNotSync>("SetterNotSync",
@@ -834,6 +852,21 @@ FastaMessage _formatExpectedButGot(Uri uri, int charOffset, String string) {
       arguments: {'string': string});
 }
 
+// DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+const FastaCode<_NamedFunctionExpression> codeNamedFunctionExpression =
+    const FastaCode<_NamedFunctionExpression>("NamedFunctionExpression",
+        template: r"A function expression can't have a name.",
+        dart2jsCode: "*ignored*",
+        format: _formatNamedFunctionExpression);
+
+typedef FastaMessage _NamedFunctionExpression(Uri uri, int charOffset);
+
+// DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+FastaMessage _formatNamedFunctionExpression(Uri uri, int charOffset) {
+  return new FastaMessage(uri, charOffset, codeNamedFunctionExpression,
+      message: "A function expression can't have a name.", arguments: {});
+}
+
 // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
 const FastaCode<_ConstFieldWithoutInitializer>
     codeConstFieldWithoutInitializer =