From: Wolfgang Bangerth <bangerth@colostate.edu>
Date: Thu, 5 May 2022 21:04:05 +0000 (-0600)
Subject: Add a note to QMidpoint.
X-Git-Tag: v9.4.0-rc1~248^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=37201a41db66ef151b9de70867503dc5fb482765;p=dealii.git

Add a note to QMidpoint.
---

diff --git a/include/deal.II/base/quadrature_lib.h b/include/deal.II/base/quadrature_lib.h
index d58afc17ec..f3f0d3c126 100644
--- a/include/deal.II/base/quadrature_lib.h
+++ b/include/deal.II/base/quadrature_lib.h
@@ -83,7 +83,12 @@ public:
 
 /**
  * The midpoint rule for numerical quadrature. This one-point formula is exact
- * for linear polynomials.
+ * for linear integrands.
+ *
+ * @note This class only works for cells that are tensor product (hypercube) cells,
+ *   that is, are either ReferenceCells::Line, ReferenceCells::Quadrilateral,
+ *   or ReferenceCells::Hexahedron. For other cell shapes, this class is not
+ *   appropriate. Use ReferenceCell::get_midpoint_quadrature() instead.
  */
 template <int dim>
 class QMidpoint : public Quadrature<dim>