Add documentation for add_description and add_epilog

Signed-off-by: Sean Robinson <sean.robinson@scottsdalecc.edu>
This commit is contained in:
Sean Robinson 2022-04-27 08:01:25 -07:00
parent c4faf29feb
commit 8b2357475f

View File

@ -316,6 +316,40 @@ Optional arguments:
You may also get the help message in string via `program.help().str()`.
#### Adding a description and an epilog to help
`ArgumentParser::add_description` will add text before the detailed argument
information. `ArgumentParser::add_epilog` will add text after all other help output.
```cpp
argparse::ArgumentParser program("main");
program.add_argument("thing")
.help("Thing to use.");
program.add_description("Forward a thing to the next member.");
program.add_epilog("Possible things include betingalw, chiz, and res.");
program.parse_args(argc, argv);
std::cout << program << std::endl;
```
```bash
$ ./main --help
Usage: main thing
Forward a thing to the next member.
Positional arguments:
thing Thing to use.
Optional arguments:
-h --help shows help message and exits [default: false]
-v --version prints version information and exits [default: false]
Possible things include betingalw, chiz, and res.
```
### List of Arguments
ArgumentParser objects usually associate a single command-line argument with a single action to be taken. The ```.nargs``` associates a different number of command-line arguments with a single action. When using ```nargs(N)```, N arguments from the command line will be gathered together into a list.