Manpages

NAME

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

SYNOPSIS

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

DESCRIPTION

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.

NAMESPACE

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

INHERITS FROM

-

CONSTRUCTORS

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.

OVERLOADED OPERATOR

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.

EXAMPLE

#include <iostream>
#include <iomanip>

//#include <bobcat/log>
#include "../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
// log.open("/tmp/out"); // or at once: Log log{ "/tmp/out" }

log << "This message is written to cout" << nl <<
setw(16) << ’ ’ << "occupying multiple lines\n";

log.off();
log << "This message is not shown\n";
log << "This message is not shown\n";
log << fnl;
log << "This message is not shown\n";

log.on(2);
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";

log.str("ab");

log(’a’) << "hello a!" << endl;
log(’b’) << "hello b!" << nl <<
setw(16) << ’ ’ << "so far, so good" << endl;

log << "not shown" << endl;

log(’c’) << "not shown\n";
log << "not shown\n";

log.setLevel(2);
log << level(2) << "in business again\n";
}

FILES

bobcat/level - defines the class interface.

SEE ALSO

bobcat(7), log(3bobcat)

BUGS

None Reported.

BOBCAT PROJECT FILES

BOBCAT

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

COPYRIGHT

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

AUTHOR

Frank B. Brokken (f.b.brokken [AT] rug.nl).