Create a prelinker for summaries.

pkg/analyzer/tool/summary/idl.dart

 // Copyright (c) 2015, 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.
 
 /**
  * This file is an "idl" style description of the summary format.  It is not
  * executed directly; instead it is parsed and transformed into code that
  * implements the summary format.
  *
  * The code generation process introduces the following non-typical semantics:
@@ skipping 732 matching lines @@
 class UnlinkedReference {
   /**
    * Name of the entity being referred to.  The empty string refers to the
    * pseudo-type `dynamic`.
    */
   String name;
 
   /**
    * Prefix used to refer to the entity, or zero if no prefix is used.  This is
    * an index into [UnlinkedUnit.references].
+   *
+   * Prefix references must always point backward; that is, for all i, if
+   * UnlinkedUnit.references[i].prefixReference != 0, then
+   * UnlinkedUnit.references[i].prefixReference < i.
    */
   int prefixReference;
 }
 
 /**
  * Unlinked summary information about a typedef declaration.
  */
 class UnlinkedTypedef {
   /**
    * Name of the typedef.
@@ skipping 226 matching lines @@
   /**
    * Indicates whether the variable is declared using the `const` keyword.
    */
   bool isConst;
 
   /**
    * Indicates whether this variable lacks an explicit type declaration.
    */
   bool hasImplicitType;
 }