Exception from several LAC classes moved here

git-svn-id: https://svn.dealii.org/trunk@9251 0785d39b-7218-0410-832d-ea1e28bc413d

diff --git a/deal.II/base/include/base/exceptions.h b/deal.II/base/include/base/exceptions.h
index 64e47cb56029c67de9fe353f4747c76ae73d509d..c9dca52ff570128b8769f2980f6037e19d90169e 100644 (file)
--- a/deal.II/base/include/base/exceptions.h
+++ b/deal.II/base/include/base/exceptions.h
@@ -968,6 +968,19 @@ namespace StandardExceptions
                  << arg1 << " switch. You should either use an\n"
                  << "alternative function, or configure again without\n"
                  << "this switch and recompile the library.");
+
+                                  /**
+                                   * Some of our numerical classes
+                                   * allow for setting alll entries
+                                   * to zero using the assignment
+                                   * operator <tt>=</tt>.
+                                   *
+                                   * In many cases, this assignment
+                                   * operator makes sense <b>only</b>
+                                   * for the argument zero. In other
+                                   * cases, this exception is thrown.
+                                   */
+  DeclException0 (ExcScalarAssignmentOnlyForZeroValue);
 }