C++ Library containing a lot of needful things: Stack Trace, Command Line Parser, Resource Handling, Configuration Files, Unix Command Execution, Directories, Regular Expressions, Tokenizer, Function Trace, Standard Extensions.

96 lines
4.2 KiB

/*! @file
@id $Id$
*/
// 1 2 3 4 5 6 7 8
// 45678901234567890123456789012345678901234567890123456789012345678901234567890
#include <mrw/args.hxx>
#ifdef MRW__OLD_PRE11_COMPILER
#include <mrw/vector.hxx>
#endif
void test_func() {
std::cout<<"test parameter was given on command line"<<std::endl;
}
int main(int argc, char** argv) try {
// option variables
bool flag(false);
int r(5);
std::string txt("Hello World");
int x(0), y(0);
std::string description("This is an example for argument processing. If the "
"description is very long, it is automatically "
"splitted over several lines and indented on each "
"new line. Arguments may have several parameters. "
"Help is generated automatically from the argument "
"declaration. The argument declaration contains long "
"and short options and a list of parameters.");
std::string returns("Returns a status of 0 on success and 1 on any error.");
// bind and evaluate options
#ifdef MRW__OLD_PRE11_COMPILER
mrw::args::parse(argc, argv, description, mrw::args::defaults()
<<mrw::args::decl("h", "help", "show this help",
mrw::args::decl::param_list()
<<mrw::args::help()
<<mrw::args::exit())
<<mrw::args::decl("r", "repeat", "number of repetitions",
mrw::args::decl::param_list()
<<mrw::args::param(r, "number"))
<<mrw::args::decl("f", "flag", "check a flag",
mrw::args::decl::param_list()
<<mrw::args::param(flag))
<<mrw::args::decl("t", "text", "pass a text",
mrw::args::decl::param_list()
<<mrw::args::param(txt, "text"))
<<mrw::args::decl("c", "coord", "add some 2D coordinates",
mrw::args::decl::param_list()
<<mrw::args::param(x, "x")
<<mrw::args::param(y, "y"))
<<mrw::args::decl("", "test", "call test_func, no shortcut",
mrw::args::decl::param_list()
<<mrw::args::func(test_func)),
returns);
#else
mrw::args::parse(argc, argv,
description,
{
{"h", "help", "show this help",
{mrw::args::help(), mrw::args::exit()}},
{"r", "repeat", "number of repetitions",
{mrw::args::param(r, "number")}},
{"f", "flag",
"check a flag; this is a boolean, so it is false by "
"default and true if the user specifies the flag on "
"the command line", {mrw::args::param(flag)}},
{"t", "text", "pass a text",
{mrw::args::param(txt, "text")}},
{"c", "coord",
"add some 2D coordinates; this is an example on how "
"you can add more than one parameter",
{mrw::args::param(x, "x"),
mrw::args::param(y, "y")}},
{"", "test", "call test_func, no shortcut",
{mrw::args::func(test_func)}},
},
returns);
#endif
// show the result
std::cout<<std::endl
<<"commandline is parsed, these are the settings now:"<<std::endl
<<"r = "<<r<<std::endl
<<"flag = "<<(flag?"yes":"no")<<std::endl
<<"txt = "<<txt<<std::endl
<<"coordinates = "<<x<<", "<<y<<std::endl;
return 0;
} catch (const std::exception& x) {
std::cerr<<"**** ERROR: "<<x.what()<<std::endl;
return 1;
}