NOT YET: Python's excellent ArgumentParser in C++
C++ Python Shell Makefile
Switch branches/tags
Nothing to show
Latest commit 01ac038 Dec 28, 2015 @weisslj Merge pull request #4 from dm0/choices-help-string
Add %choices replacement for choices option type
Permalink
Failed to load latest commit information.
t
.gitignore Add test Makefile target Dec 19, 2015
.travis.yml
LICENSE Clarify license (MIT) Dec 14, 2015
Makefile
OptionParser.cpp Merge with master to solve merge conflicts Dec 21, 2015
OptionParser.h
README.md Update documentation / remove redundancy Dec 20, 2015
test.sh
testprog.cpp

README.md

cpp-optparse

This is yet another option parser for C++. It is modelled after the excellent Python optparse API. Although incomplete, anyone familiar to optparse should feel at home.

  • Copyright (c) 2010 Johannes Weißl
  • License: MIT License

Design decisions

  • Elegant and easy usage more important than speed / flexibility
  • Small size more important than feature completeness, e.g.:
    • No unicode
    • No checking for user programming errors
    • No conflict handlers
    • No adding of new actions

FAQ

  • Why not use getopt/getopt_long?
    • Not C++ / not completely POSIX
    • Too cumbersome to use, would need lot of additional code
  • Why not use Boost.Program_options?
    • Boost not installed on all target platforms (esp. cluster, HPC, ...)
    • Too big to include just for option handling for many projects: 322 *.h (44750 lines) + 7 *.cpp (2078 lines)
  • Why not use tclap/Opag/Options/CmdLine/Anyoption/Argument_helper/...?
    • Similarity to Python desired for faster learning curve

Future work

  • Support nargs > 1?

Example

using optparse::OptionParser;

OptionParser parser = OptionParser() .description("just an example");

parser.add_option("-f", "--file") .dest("filename")
                  .help("write report to FILE") .metavar("FILE");
parser.add_option("-q", "--quiet")
                  .action("store_false") .dest("verbose") .set_default("1")
                  .help("don't print status messages to stdout");

optparse::Values options = parser.parse_args(argc, argv);
vector<string> args = parser.args();

if (options.get("verbose"))
    cout << options["filename"] << endl;