[gtk/matthiasc/for-master: 6/11] docs: Document GtkBitsetIter

[Matthias Clasen <matthiasc src gnome org>]

commit b9e8935037fac6a99fba2bb449ae656dabb5fee7
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu Jul 16 20:27:00 2020 -0400

    docs: Document GtkBitsetIter

 gtk/gtkbitset.c | 7 +++----
 gtk/gtkbitset.h | 9 +++++++++
 2 files changed, 12 insertions(+), 4 deletions(-)
---
diff --git a/gtk/gtkbitset.c b/gtk/gtkbitset.c
index 6f29e59757..b4d8abb113 100644
--- a/gtk/gtkbitset.c
+++ b/gtk/gtkbitset.c
@@ -27,20 +27,19 @@
  * SECTION:gtkbitset
  * @title: GtkBitset
  * @short_description: Sets of integers
- * @see_also: GtkSelectionModel
+ * @see_also: #GtkSelectionModel
  *
  * #GtkBitset is a data structure for representing a set of unsigned integers.
  * Another name for this data structure is "bitmap".
  *
- * This version is based on [roaring bitmaps](https://roaringbitmap.org/).
+ * The current implemenation is based on [roaring bitmaps](https://roaringbitmap.org/).
  *
  * A bitset allows adding a set of integers and provides support for set operations
  * like unions, intersections and checks for equality or if a value is contained
  * in the set. #GtkBitset also contains various functions to query metadata about
  * the bitset, such as the minimum or maximum values or its size.
  *
- * The fastest way to iterate values in a bitset is #GtkBitsetIter which allows
- * quick iteration of all the values in a bitset.
+ * The fastest way to iterate values in a bitset is #GtkBitsetIter.
  *
  * The main use case for #GtkBitset is implementing complex selections for
  * #GtkSelectionModel.
diff --git a/gtk/gtkbitset.h b/gtk/gtkbitset.h
index 19528ef55e..e54291cb91 100644
--- a/gtk/gtkbitset.h
+++ b/gtk/gtkbitset.h
@@ -130,6 +130,15 @@ void                    gtk_bitset_splice                       (GtkBitset
                                                                  guint                   removed,
                                                                  guint                   added);
 
+/**
+ * GtkBitsetIter:
+ *
+ * An opaque, stack-allocated struct for iterating
+ * over the elements of a #GtkBitset. Before a GtkBitsetIter
+ * can be used, it needs to be initialized with
+ * gtk_bitset_iter_init_first(), gtk_bitset_iter_init_last()
+ * or gtk_bitset_iter_init_at().
+ */
 typedef struct {gpointer private_data[10]; } GtkBitsetIter;
 
 GDK_AVAILABLE_IN_ALL