An object oriented way to handle command line parsing.
Create a command:
// Create the command function
cmd_parser::CommandFunc func = [](cmd_parser::CommandArg& argz) {
// Your function here
// Also possible to capture values => [&myValue]
// myValue.doSomething(argz);
};
// Create the command
// command name, function to execute, help text and required number of arguments
Command default_cmd{"default", func, "This is the default (fallback) command.", 1};
Command Parser:
// Initialize command parser with default (fallback) command
CommandParser parser{default_cmd};
// Add more commands to the parser
parser.add(anotherCommand);
// Parse user input
parser.exec(argc, argv); // alt. parser.exec(vector<string>);
make will build command_parser.o and example.
Show usage:
$ ./example
USAGE:
guess Guess the secret word! (HINT: It's 'chicken')
none A command with no required arguments.
many A command with 3 required arguments
Default:
default This is the default (fallback) command.
Default command:
# Command "test" does not exist, use default command
$ ./example test
Default command executed with argument: test
No required arguments:
$ ./example none
I don't care about your arguments.
Three required arguments:
$ ./example many one two three
Arguments: one two three
# Too few arguments will show usage for "many"
$ ./example many one two
many A command with 3 required arguments