summaryrefslogtreecommitdiffstats
path: root/vendor/clap/examples/tutorial_derive/04_02_parse.md
blob: 573b43cc79304c0bb722dda73759ed3c1f3e014e (plain)
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_derive --help
A simple to use, efficient, and full-featured Command Line Argument Parser

Usage: 04_02_parse_derive[EXE] <PORT>

Arguments:
  <PORT>  Network port to use

Options:
  -h, --help     Print help
  -V, --version  Print version

$ 04_02_parse_derive 22
PORT = 22

$ 04_02_parse_derive 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'.

```