Made a virtual boolean member function to request populated Unit checking; the request is _on_ by default and is _off_ for non-biorthogonal field classes.

Author: Martin D. Weinberg

expui/Coefficients.H

@@ -120,6 +120,9 @@ namespace CoefClasses
     //! Unit validator
     static UnitValidator check;
 
+    //! Units required for HDF5
+    virtual bool unitsRequired() { return true; }
+
   public:
 
     //! Constructor
@@ -849,6 +852,9 @@ namespace CoefClasses
     //! Write coefficient data in H5
     virtual unsigned WriteH5Times(HighFive::Group& group, unsigned count);
 
+    //! Units required for HDF5
+    virtual bool unitsRequired() { return false; }
+
   public:
 
     //! Constructor
@@ -955,6 +961,9 @@ namespace CoefClasses
     //! Write coefficient data in H5
     virtual unsigned WriteH5Times(HighFive::Group& group, unsigned count);
 
+    //! Units required for HDF5
+    virtual bool unitsRequired() { return false; }
+
   public:
 
     //! Constructor
@@ -1066,6 +1075,9 @@ namespace CoefClasses
     //! Write coefficient data in H5
     virtual unsigned WriteH5Times(HighFive::Group& group, unsigned count);
 
+    //! Units required for HDF5
+    virtual bool unitsRequired() { return false; }
+
   public:
 
     //! Constructor
@@ -1193,6 +1205,9 @@ namespace CoefClasses
     //! Write coefficient data in H5
     virtual unsigned WriteH5Times(HighFive::Group& group, unsigned count);
 
+    //! Units required for HDF5
+    virtual bool unitsRequired() { return false; }
+
   public:
 
     //! Constructor

expui/Coefficients.cc

@@ -151,7 +151,7 @@ namespace CoefClasses
 
   void Coefs::WriteH5Units(HighFive::File& file)
   {
-    if (units.size() != 4) {
+    if (unitsRequired() and units.size() != 4) {
       std::ostringstream sout;
       sout << "---- Coefs::WriteH5Units: Warning, expected 4 units: "
 	   << "(length, mass, time, G) or (length, mass, velocity, G), etc. "