Method getIndexOfGlobal

src/main/java/net/starlark/java/eval/Module.java:289–299

Returns the index within this Module of a global variable, given its name, creating a new slot for it if needed. The numbering of globals used by these functions is not the same as the numbering within any compiled Program. Thus each StarlarkFunction must contain a secondary index mapping Program in

(String name)

   * index mapping Program indices (from Binding.index) to Module indices.
   */
  int getIndexOfGlobal(String name) {
    int i = globalIndex.size();
    Integer prev = globalIndex.putIfAbsent(name, i);
    if (prev != null) {
      return prev;
    }
    if (i == globals.length) {
      globals = Arrays.copyOf(globals, globals.length << 1); // grow by doubling
    }
    return i;
  }

  private static final int[] EMPTY_INDICES = new int[0];