Implement standard exception for missing user implementation

diff --git a/include/deal.II/base/exceptions.h b/include/deal.II/base/exceptions.h
index 40b288281daf3f21812b0cf8dcb2426c974ca5db..b0648add4ad39d0011b680b714f91657633621e3 100644 (file)
--- a/include/deal.II/base/exceptions.h
+++ b/include/deal.II/base/exceptions.h
@@ -851,6 +851,14 @@ namespace StandardExceptions
     "been called; if the answer is 'yes', then you need to "
     "implement the missing override in your class.");
 
+  /**
+   * This exception is used if some user function is not provided.
+   */
+  DeclException1(ExcFunctionNotProvided,
+                 std::string,
+                 << "Please provide an implementation for the function \""
+                 << arg1 << "\"");
+
   /**
    * This exception is used if some object is found uninitialized.
    */