Fix doc about returning invalid fe indices.

diff --git a/include/deal.II/hp/fe_collection.h b/include/deal.II/hp/fe_collection.h
index 8287171f3ba84791213ba6d1e35c75ece2d9aba6..6e7e07fb6a317c3940712654c47949604505ebec 100644 (file)
--- a/include/deal.II/hp/fe_collection.h
+++ b/include/deal.II/hp/fe_collection.h
@@ -422,7 +422,7 @@ namespace hp
      * If this set consists of exactly one element, we consider it to be
      * the dominating one and return its corresponding index. Further, if the
      * function is not able to find a finite element at all, it returns
-     * numbers::invalid_unsigned_int.
+     * numbers::invalid_fe_index.
      *
      * For example, if a FECollection consists of
      * `{FE_Q(1),FE_Q(2),FE_Q(3),FE_Q(4)}` elements and we are looking for the
@@ -458,7 +458,7 @@ namespace hp
      * If this set consists of exactly one element, we consider it to be
      * the dominated one and return its corresponding index. Further, if the
      * function is not able to find a finite element at all, it returns
-     * numbers::invalid_unsigned_int.
+     * numbers::invalid_fe_index.
      *
      * For example, if a FECollection consists of
      * `{FE_Q(1),FE_Q(2),FE_Q(3),FE_Q(4)}` elements and we are looking for the
@@ -498,7 +498,7 @@ namespace hp
      * If this set consists of exactly one element, we consider it to be
      * the dominated one and return its corresponding index. Further, if the
      * function is not able to find a finite element at all, it returns
-     * numbers::invalid_unsigned_int.
+     * numbers::invalid_fe_index.
      *
      * The @p codim parameter describes the codimension of the investigated
      * subspace and specifies that it is subject to this comparison. See
@@ -524,7 +524,7 @@ namespace hp
      * If this set consists of exactly one element, we consider it to be
      * the dominating one and return its corresponding index. Further, if the
      * function is not able to find a finite element at all, it returns
-     * numbers::invalid_unsigned_int.
+     * numbers::invalid_fe_index.
      *
      * The @p codim parameter describes the codimension of the investigated
      * subspace and specifies that it is subject to this comparison. See