Also delete the FunctionParser operator=.

diff --git a/include/deal.II/base/function_parser.h b/include/deal.II/base/function_parser.h
index 4aa601daf3a0c8edc6b41c32f77b5e523ccd8900..739f8b22bb0e7b8af8a949279d2ebc4b8b6effbb 100644 (file)
--- a/include/deal.II/base/function_parser.h
+++ b/include/deal.II/base/function_parser.h
@@ -258,6 +258,13 @@ public:
    */
   ~FunctionParser() override;
 
+  /**
+   * Copy operator. Objects of this type can not be copied, and
+   * consequently this operator is deleted.
+   */
+  FunctionParser &
+  operator=(const FunctionParser &) = delete;
+
   /**
    * Type for the constant map. Used by the initialize() method.
    */