DenseLinAlgPack_OutFormat.hpp

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00004 // Moocho: Multi-functional Object-Oriented arCHitecture for Optimization
00005 //                  Copyright (2003) Sandia Corporation
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00011 // it under the terms of the GNU Lesser General Public License as
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00028 
00029 #ifndef LINALGPACK_OUT_FORMAT_H
00030 #define LINALGPACK_OUT_FORMAT_H
00031 
00032 #include "DenseLinAlgPack_IOFormat.hpp"
00033 
00034 namespace DenseLinAlgPack {
00035 
00037 /* * Output stream operator function for const_bound_format objects.
00038   *
00039   * This template function performs the following tasks.
00040   * \begin{enumeration}
00041   * <li> Saves the formating state of #os#
00042   * <li> Sets the formating state of #os# to that stored in #bf.f()#
00043   * <li> Calls #output(os, bf.obj(), bf.extra_flags().flags())#
00044   * <li> Resets the streams formating state to its original.
00045   * \end{enumeration}
00046   *
00047   * The original formating state of #os# is preserved even if an exception
00048   * is thrown. 
00049   */
00050 template<class T>
00051 std::ostream& operator<<(std::ostream& os, const LinAlgPackIO::const_bound_format<T>& bf)
00052 {
00053   using LinAlgPackIO::ios_format_memento;
00054   ios_format_memento old_format = ios_format_memento::save_format(os);
00055   try {
00056     bf.f().set_format(os);
00057     output( os, bf.obj(), bf.f().extra_flags().flags() );
00058   }
00059   catch(...) {
00060     old_format.set_format(os);
00061     throw;
00062   }
00063   old_format.set_format(os);
00064   return os;
00065 }
00066 
00068 template<class T>
00069 inline std::ostream& operator<<(std::ostream& os, const LinAlgPackIO::bound_format<T>& bf) {
00070   return operator<<( os, LinAlgPackIO::const_bound_format<T>( bf.f(), bf.obj() ) );
00071 }
00072 
00073 } // end namespace DenseLinAlgPack
00074 
00075 #endif // LINALGPACK_OUT_FORMAT_H

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