Add flag --load_deferred_eagerly

runtime/vm/parser.cc

 // Copyright (c) 2012, 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.
 
 #include "vm/parser.h"
 
 #include "lib/invocation_mirror.h"
 #include "platform/utils.h"
 #include "vm/ast_transformer.h"
 #include "vm/bootstrap.h"
@@ skipping 22 matching lines @@
 #include "vm/symbols.h"
 #include "vm/tags.h"
 #include "vm/timer.h"
 #include "vm/zone.h"
 
 namespace dart {
 
 DEFINE_FLAG(bool, enable_asserts, false, "Enable assert statements.");
 DEFINE_FLAG(bool, enable_debug_break, false, "Allow use of break \"message\".");
 DEFINE_FLAG(bool, enable_type_checks, false, "Enable type checks.");
+DEFINE_FLAG(bool, load_deferred_eagerly, false,
+    "Load deferred libraries eagerly.");
 DEFINE_FLAG(bool, trace_parser, false, "Trace parser operations.");
 DEFINE_FLAG(bool, warn_mixin_typedef, true, "Warning on legacy mixin typedef.");
 DECLARE_FLAG(bool, error_on_bad_type);
 DECLARE_FLAG(bool, throw_on_javascript_int_overflow);
 DECLARE_FLAG(bool, warn_on_javascript_compatibility);
 
 static void CheckedModeHandler(bool value) {
   FLAG_enable_asserts = value;
   FLAG_enable_type_checks = value;
 }
@@ skipping 5719 matching lines @@
   // Create a new library if it does not exist yet.
   Library& library = Library::Handle(Z, Library::LookupLibrary(canon_url));
   if (library.IsNull()) {
     library = Library::New(canon_url);
     library.Register();
   }
 
   // If loading hasn't been requested yet, and if this is not a deferred
   // library import, call the library tag handler to request loading
   // the library.
-  if (library.LoadNotStarted() && !is_deferred_import) {
+  if (library.LoadNotStarted() &&
+      (!is_deferred_import || FLAG_load_deferred_eagerly)) {
     library.SetLoadRequested();
     CallLibraryTagHandler(Dart_kImportTag, import_pos, canon_url);
   }
 
   Namespace& ns = Namespace::Handle(Z,
       Namespace::New(library, show_names, hide_names));
   if (metadata_pos >= 0) {
     ns.AddMetadata(metadata_pos, current_class());
   }
 
@@ skipping 7684 matching lines @@
 void Parser::SkipQualIdent() {
   ASSERT(IsIdentifier());
   ConsumeToken();
   if (CurrentToken() == Token::kPERIOD) {
     ConsumeToken();  // Consume the kPERIOD token.
     ExpectIdentifier("identifier expected after '.'");
   }
 }
 
 }  // namespace dart