Steinberg::CommandLine Namespace Reference

Very simple command-line parser. More...

Classes
class	Description
	The description of one single command-line option. More...
class	Descriptions
	List of command-line option descriptions. More...
class	VariablesMap
	Command-line parsing result. More...

Typedefs
using	FilesVector = std::vector< std::string >
	type of the list of elements on the command line that are not handled by options parsing More...

Functions
bool	parse (int ac, char *av[], const Descriptions &desc, VariablesMap &result, FilesVector *files=nullptr)
	Parse the command - line. More...
std::ostream &	operator<< (std::ostream &os, const Descriptions &desc)
	Make Descriptions stream able. More...

Detailed Description

Very simple command-line parser.

Parses the command-line into a CommandLine::VariablesMap.
The command-line parser uses CommandLine::Descriptions to define the available options.

Example:

#include "base/source/fcommandline.h"
#include <iostream>
 
int main (int argc, char* argv[])
{
    using namespace std;
 
    CommandLine::Descriptions desc;
    CommandLine::VariablesMap valueMap;
 
    desc.addOptions ("myTool")
        ("help", "produce help message")
        ("opt1", string(), "option 1")
        ("opt2", string(), "option 2")
    ;
    CommandLine::parse (argc, argv, desc, valueMap);
 
    if (valueMap.hasError () || valueMap.count ("help"))
    {
        cout << desc << "\n";
        return 1;
    }
    if (valueMap.count ("opt1"))
    {
        cout << "Value of option 1 " << valueMap["opt1"] << "\n";
    }
    if (valueMap.count ("opt2"))
    {
        cout << "Value of option 2 " << valueMap["opt2"] << "\n";
    }
    return 0;
}

Note

This is a "header only" implementation.
If you need the declarations in more than one cpp file, you have to define SMTG_NO_IMPLEMENTATION in all but one file.

Typedef Documentation

FilesVector

using FilesVector = std::vector<std::string>

type of the list of elements on the command line that are not handled by options parsing

Function Documentation

parse()

bool parse	(	int	ac,
		char *	av[],
		const Descriptions &	desc,
		VariablesMap &	result,
		FilesVector *	files
	)

Parse the command - line.

Parameters

[in]	ac	count of command-line parameters
[in]	av	command-line as array of strings
[in]	desc	Descriptions including all allowed options
[out]	result	the parsing result
[out]	files	optional list of elements on the command line that are not handled by options parsing

operator<<()

std::ostream & operator<<	(	std::ostream &	os,
		const Descriptions &	desc
	)

Make Descriptions stream able.