1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
|
```console
$ 04_02_parse --help
A simple to use, efficient, and full-featured Command Line Argument Parser
Usage: 04_02_parse[EXE] <PORT>
Arguments:
<PORT> Network port to use
Options:
-h, --help Print help
-V, --version Print version
$ 04_02_parse 22
PORT = 22
$ 04_02_parse foobar
? failed
error: invalid value 'foobar' for '<PORT>': invalid digit found in string
For more information, try '--help'.
$ 04_02_parse_derive 0
? failed
error: invalid value '0' for '<PORT>': 0 is not in 1..=65535
For more information, try '--help'.
```
|
