FBB::mlm - Manipulator modifying left margins of OFoldStream objects
#include <bobcat/ofoldstream> or
Linking option: -lbobcat
The mlm class implements a manipulator that can be inserted into OFoldStream objects to modify the stream’s left margin by a requested amount. The request cannot result in a negative left margin value. If a negative left margin would be the arithmetic result of the request then left margin 0 will silently be used.
Depending on the tab-setting of the OFoldStream the inserted value represents the number of blank space characters or the number of tab-characters that will be added to the left margin.
The request will be processed at the next newline character or std::flush or std::endl manipulator that is inserted into the stream. If a line is still empty once an mlm object and a flush manipulator are inserted into the stream then the new left margin will be effective at the next word inserted into that line (cf., the example section below)
A bad_cast exception is thrown when the manipulator is inserted into an ostream that is not using a OFoldBuf buffer.
All constructors, members, operators and manipulators, mentioned in this man-page, are defined in the namespace FBB.
- mlm(int addValue):
Copy and move constructors (and assignment operators) are available.
- std::ostream &modify(std::ostream &out) const:
This member is normally not directly called from user-programs. Instead, it is called by the insertion operator when inserting the mlm manipulator.
using namespace std;
using namespace FBB;
OFoldStream out(cout, 0, 80);
out << "hello world (left margin is 0)" << mlm(4) << "\n"
"this uses a 4 character wide left margin\n" <<
mlm(-10) << flush <<
"left margin -6 changed to 0, active on this line\n";
bobcat/mlm - defines the class interface
bobcat(7), manipulators(3bobcat), lm(3bobcat), ofoldstream(3bobcat)
- https://fbb-git.gitlab.io/bobcat/: gitlab project page;
- bobcat_6.02.02-x.dsc: detached signature;
- bobcat_6.02.02-x.tar.gz: source archive;
- bobcat_6.02.02-x_i386.changes: change log;
- libbobcat1_6.02.02-x_*.deb: debian package containing the libraries;
- libbobcat1-dev_6.02.02-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 (firstname.lastname@example.org).