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