Serialize long integers as unsigned 32-bit pieces.

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 432 matching lines @@
  * operations consume additional data from the other fields of this class.
  */
 class UnlinkedConst {
   /**
    * Sequence of operations to execute (starting with an empty stack) to form
    * the constant value.
    */
   List<UnlinkedConstOperation> operations;
 
   /**
-   * Sequence of 32-bit integers consumed by the operations `pushArgument`,
-   * `pushInt`, `shiftOr`, `concatenate`, `invokeConstructor`, `makeList`, and
-   * `makeMap`.
+   * Sequence of unsigned 32-bit integers consumed by the operations
+   * `pushArgument`, `pushInt`, `shiftOr`, `concatenate`, `invokeConstructor`,
+   * `makeList`, and `makeMap`.
    */
   List<int> ints;
 
   /**
    * Sequence of 64-bit doubles consumed by the operation `pushDouble`.
    */
   List<double> doubles;
 
   /**
    * Sequence of strings consumed by the operations `pushString` and
@@ skipping 16 matching lines @@
  * context of a stack which is initially empty.
  */
 enum UnlinkedConstOperation {
   /**
    * Push the value of the n-th constructor argument (where n is obtained from
    * [UnlinkedConst.ints]) onto the stack.
    */
   pushArgument,
 
   /**
-   * Push the next value from [UnlinkedConst.ints] (a 32-bit signed integer)
+   * Push the next value from [UnlinkedConst.ints] (a 32-bit unsigned integer)
    * onto the stack.
    *
    * Note that Dart supports integers larger than 32 bits; these are
    * represented by composing 32 bit values using the [shiftOr] operation.
    */
   pushInt,
 
   /**
    * Pop the top value off the stack, which should be an integer.  Multiply it
    * by 2^32, "or" in the next value from [UnlinkedConst.ints] (which is
@@ skipping 914 matching lines @@
   /**
    * If this variable is propagable, nonzero slot id identifying which entry in
    * [LinkedLibrary.types] contains the propagated type for this variable.  If
    * there is no matching entry in [LinkedLibrary.types], then this variable's
    * propagated type is the same as its declared type.
    *
    * Non-propagable variables have a [propagatedTypeSlot] of zero.
    */
   int propagatedTypeSlot;
 }