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FBB::level(3bobcat) Log-manipulator FBB::level(3bobcat)


FBB::level - Manipulator setting the log-level of FBB::Log objects


#include <bobcat/level>
Linking option: -lbobcat


An FBB::level object is used to specify insertion `forces’ of information that is inserted into FBB::Log objects. When inserted into Log objects it defines the `force’ of subsequent insertions (or write calls) into those Log objects.

Conversely, Log objects may specify insertion `resistances’ through their setLevel members. If the level’s `force’ is equal to or exceeds the Log object’s `resistance’ then the insertion is performed, otherwise the insertion is ignored. A single insertion statement may contain multiple level calls. If so, then each level call updates the `force’ of insertions following the level call.

By default insertions into Log objects not preceded by level insertions are completed.

When a level object is inserted into another kind of std::ostream object the level object performs no actions.


All constructors, members, operators and manipulators, mentioned in this man-page, are defined in the namespace FBB.




level(size_t force):
This constructor is used in insertion statements, usually inserting it as anonymous object into an FBB::Log object.

Copy and move constructors (and assignment operators) are available.


std::ostream &::operator<<(std::ostream &ostr, FBB::level const &force):
If the ostr can be downcasted to an FBB::Log object then subsequent insertions are performed if force exceeds the Log object’s `resistance’ as specified by its setLevel member. If ostr does not actually refer to a Log object then ostr is returned without any further action, and ostr handles subsequent insertions in its default way.


#include <iostream>
#include <iomanip>
#include <bobcat/log>
#include <bobcat/level>
using namespace std;
using namespace FBB;
int main()
//    Log &log = Log::initialize("&1"); // uses the static Log object

Log log; // explicitly defining a Log object"/tmp/out"); // or at once: Log log{ "/tmp/out" }
log << "This message is written to cout" << nl <<
setw(16) << ’ ’ << "occupying multiple lines\n";;
log << "This message is not shown\n";
log << "This message is not shown\n";
log << fnl;
log << "This message is not shown\n";
log << "This message is shown\n";
log << level(0) << "not shown" << level(2) << "shown at level 2\n";
log << level(3) << "at level(3)" << level(1) << "not shown" << fnl;
log << "separate new line\n";
log << level(2) << "in business again\n";
log << "final line\n"; }


bobcat/level - defines the class interface.


bobcat(7), log(3bobcat)


None Reported.

BOBCAT PROJECT FILES gitlab project page;
bobcat_5.07.00-x.dsc: detached signature;
bobcat_5.07.00-x.tar.gz: source archive;
bobcat_5.07.00-x_i386.changes: change log;
libbobcat1_5.07.00-x_*.deb: debian package containing the libraries;
libbobcat1-dev_5.07.00-x_*.deb: debian package containing the libraries, headers and manual pages;


Bobcat is an acronym of `Brokken’s Own Base Classes And Templates’.


This is free software, distributed under the terms of the GNU General Public License (GPL).


Frank B. Brokken (

2005-2020 libbobcat-dev_5.07.00