From: David Wells <drwells@vt.edu>
Date: Tue, 2 Jun 2015 21:19:43 +0000 (-0400)
Subject: Remove 'dummy' members and allow empty structs.
X-Git-Tag: v8.3.0-rc1~129^2~1
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=95a559524180b4feaf2de760052d6fdd3d03dd55;p=dealii.git

Remove 'dummy' members and allow empty structs.
Empty structs are implementation-dependent in C, but are acceptable in
C++. Therefore unused private members are not needed (and they cause
clang to generate warnings).
---

diff --git a/include/deal.II/base/data_out_base.h b/include/deal.II/base/data_out_base.h
index 768ab37217..a8e47c9a32 100644
--- a/include/deal.II/base/data_out_base.h
+++ b/include/deal.II/base/data_out_base.h
@@ -509,15 +509,7 @@ namespace DataOutBase
    * @ingroup output
    */
   struct GnuplotFlags : public OutputFlagsBase<GnuplotFlags>
-  {
-  private:
-    /**
-     * Dummy entry to suppress compiler warnings when copying an empty
-     * structure. Remove this member when adding the first flag to this
-     * structure (and remove the <tt>private</tt> as well).
-     */
-    int dummy;
-  };
+  {};
 
   /**
    * Flags controlling the details of output in Povray format. Several flags
@@ -816,15 +808,7 @@ namespace DataOutBase
    * @ingroup output
    */
   struct GmvFlags : public OutputFlagsBase<GmvFlags>
-  {
-  private:
-    /**
-     * Dummy entry to suppress compiler warnings when copying an empty
-     * structure. Remove this member when adding the first flag to this
-     * structure (and remove the <tt>private</tt> as well).
-     */
-    int dummy;
-  };
+  {};
 
   /**
    * Flags controlling the details of output in Tecplot format.
@@ -977,14 +961,6 @@ namespace DataOutBase
      * what the current readers and writers understand.
      */
     static const unsigned int format_version = 3;
-
-  private:
-    /**
-     * Dummy entry to suppress compiler warnings when copying an empty
-     * structure. Remove this member when adding the first flag to this
-     * structure (and remove the <tt>private</tt> as well).
-     */
-    int dummy;
   };
 
   /**