mirror of
https://github.com/triqs/dft_tools
synced 2024-12-25 22:03:43 +01:00
78 lines
2.3 KiB
C++
78 lines
2.3 KiB
C++
/*******************************************************************************
|
|
*
|
|
* TRIQS: a Toolbox for Research in Interacting Quantum Systems
|
|
*
|
|
* Copyright (C) 2011 by M. Ferrero, O. Parcollet
|
|
*
|
|
* TRIQS is free software: you can redistribute it and/or modify it under the
|
|
* terms of the GNU General Public License as published by the Free Software
|
|
* Foundation, either version 3 of the License, or (at your option) any later
|
|
* version.
|
|
*
|
|
* TRIQS is distributed in the hope that it will be useful, but WITHOUT ANY
|
|
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
|
|
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
|
|
* details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along with
|
|
* TRIQS. If not, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
******************************************************************************/
|
|
#ifndef TRIQS_UTILITY_REPORT_STREAM_H
|
|
#define TRIQS_UTILITY_REPORT_STREAM_H
|
|
#include <ostream>
|
|
#include <sstream>
|
|
|
|
namespace triqs { namespace utility {
|
|
|
|
/**
|
|
* \brief Output stream with flexible verbosity level.
|
|
*
|
|
* This class behaves pretty much like a standard ostream but you can also
|
|
* set some verbosity level
|
|
*
|
|
* Example:
|
|
*
|
|
* report_stream rep(2); // this creates a report stream w/ verbosity 2
|
|
* rep << "Hello" << endl; // this prints Hello
|
|
* rep(2) << "Hello2" << endl; // this prints Hello2
|
|
* rep(3) << "Hello3" << endl; // this doesn't print anything because the verbosity < 3
|
|
*
|
|
*/
|
|
class report_stream {
|
|
|
|
std::ostream * out;
|
|
int verbosity;
|
|
|
|
public:
|
|
|
|
report_stream(std::ostream * out_, int verbosity_ = 1): out(out_), verbosity(verbosity_) {}
|
|
|
|
report_stream operator () (int n) {
|
|
return report_stream(out, verbosity-n+1);
|
|
}
|
|
|
|
template<class T>
|
|
report_stream & operator << (T const & x) {
|
|
if (verbosity > 0) (*out)<<x;
|
|
return *this;
|
|
}
|
|
|
|
// this is the type of std::cout
|
|
typedef std::basic_ostream<char, std::char_traits<char> > CoutType;
|
|
|
|
// this is the function signature of std::endl
|
|
typedef CoutType& (*StandardEndLine)(CoutType&);
|
|
|
|
// define an operator<< to take in std::endl
|
|
report_stream & operator << (StandardEndLine manip) {
|
|
// call the function, but we cannot return it's value
|
|
if (verbosity > 0) manip(*out);
|
|
return *this;
|
|
}
|
|
|
|
};
|
|
|
|
}}
|
|
#endif
|