First steps toward AST-based type inference involving closures.

pkg/analyzer/lib/src/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
  * contains abstract classes which declare the interface for reading data from
  * summaries.  It is parsed and transformed into code that implements the
  * summary format.
  *
@@ skipping 1435 matching lines @@
    * Pop the top value from the stack and check whether it is a subclass of the
    * type with reference from [UnlinkedConst.references], push the result into
    * the stack.
    */
   typeCheck,
 
   /**
    * Pop the top value from the stack and raise an exception with this value.
    */
   throwException,
+
+  /**
+   * Obtain two values `n` and `m` from [UnlinkedConst.ints].  Then, starting at
+   * the executable element for the expression being evaluated, if n > 0, pop to
+   * the nth enclosing function element.  Then, push the mth local function of
+   * that element onto the stack.
+   */
+  pushLocalFunctionReference,
 }
 
 /**
  * Unlinked summary information about a constructor initializer.
  */
 abstract class UnlinkedConstructorInitializer extends base.SummaryClass {
   /**
    * If [kind] is `thisInvocation` or `superInvocation`, the arguments of the
    * invocation.  Otherwise empty.
    */
@@ skipping 1238 matching lines @@
    */
   @Id(11)
   int get visibleLength;
 
   /**
    * If a local variable, the beginning of the visible range; zero otherwise.
    */
   @Id(12)
   int get visibleOffset;
 }