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DenseLinAlgPack_OutFormat.hpp
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41 
42 #ifndef LINALGPACK_OUT_FORMAT_H
43 #define LINALGPACK_OUT_FORMAT_H
44 
45 #include "DenseLinAlgPack_IOFormat.hpp"
46 
47 namespace DenseLinAlgPack {
48 
50 /* * Output stream operator function for const_bound_format objects.
51  *
52  * This template function performs the following tasks.
53  * \begin{enumeration}
54  * <li> Saves the formating state of #os#
55  * <li> Sets the formating state of #os# to that stored in #bf.f()#
56  * <li> Calls #output(os, bf.obj(), bf.extra_flags().flags())#
57  * <li> Resets the streams formating state to its original.
58  * \end{enumeration}
59  *
60  * The original formating state of #os# is preserved even if an exception
61  * is thrown.
62  */
63 template<class T>
64 std::ostream& operator<<(std::ostream& os, const LinAlgPackIO::const_bound_format<T>& bf)
65 {
66  using LinAlgPackIO::ios_format_memento;
67  ios_format_memento old_format = ios_format_memento::save_format(os);
68  try {
69  bf.f().set_format(os);
70  output( os, bf.obj(), bf.f().extra_flags().flags() );
71  }
72  catch(...) {
73  old_format.set_format(os);
74  throw;
75  }
76  old_format.set_format(os);
77  return os;
78 }
79 
81 template<class T>
82 inline std::ostream& operator<<(std::ostream& os, const LinAlgPackIO::bound_format<T>& bf) {
83  return operator<<( os, LinAlgPackIO::const_bound_format<T>( bf.f(), bf.obj() ) );
84 }
85 
86 } // end namespace DenseLinAlgPack
87 
88 #endif // LINALGPACK_OUT_FORMAT_H