1use std::rc::Rc;
3use std::fmt as std_fmt;
4use std::ffi::{OsStr, OsString};
5
6use args::settings::ArgSettings;
8use map::{self, VecMap};
9use INTERNAL_ERROR_MSG;
10
11#[doc(hidden)]
12pub trait AnyArg<'n, 'e>: std_fmt::Display {
13 fn name(&self) -> &'n str;
14 fn overrides(&self) -> Option<&[&'e str]>;
15 fn aliases(&self) -> Option<Vec<&'e str>>;
16 fn requires(&self) -> Option<&[(Option<&'e str>, &'n str)]>;
17 fn blacklist(&self) -> Option<&[&'e str]>;
18 fn required_unless(&self) -> Option<&[&'e str]>;
19 fn is_set(&self, ArgSettings) -> bool;
20 fn set(&mut self, ArgSettings);
21 fn has_switch(&self) -> bool;
22 fn max_vals(&self) -> Option<u64>;
23 fn min_vals(&self) -> Option<u64>;
24 fn num_vals(&self) -> Option<u64>;
25 fn possible_vals(&self) -> Option<&[&'e str]>;
26 fn validator(&self) -> Option<&Rc<Fn(String) -> Result<(), String>>>;
27 fn validator_os(&self) -> Option<&Rc<Fn(&OsStr) -> Result<(), OsString>>>;
28 fn short(&self) -> Option<char>;
29 fn long(&self) -> Option<&'e str>;
30 fn val_delim(&self) -> Option<char>;
31 fn takes_value(&self) -> bool;
32 fn val_names(&self) -> Option<&VecMap<&'e str>>;
33 fn help(&self) -> Option<&'e str>;
34 fn long_help(&self) -> Option<&'e str>;
35 fn default_val(&self) -> Option<&'e OsStr>;
36 fn default_vals_ifs(&self) -> Option<map::Values<(&'n str, Option<&'e OsStr>, &'e OsStr)>>;
37 fn env<'s>(&'s self) -> Option<(&'n OsStr, Option<&'s OsString>)>;
38 fn longest_filter(&self) -> bool;
39 fn val_terminator(&self) -> Option<&'e str>;
40}
41
42pub trait DispOrder {
43 fn disp_ord(&self) -> usize;
44}
45
46impl<'n, 'e, 'z, T: ?Sized> AnyArg<'n, 'e> for &'z T where T: AnyArg<'n, 'e> + 'z {
47 fn name(&self) -> &'n str { (*self).name() }
48 fn overrides(&self) -> Option<&[&'e str]> { (*self).overrides() }
49 fn aliases(&self) -> Option<Vec<&'e str>> { (*self).aliases() }
50 fn requires(&self) -> Option<&[(Option<&'e str>, &'n str)]> { (*self).requires() }
51 fn blacklist(&self) -> Option<&[&'e str]> { (*self).blacklist() }
52 fn required_unless(&self) -> Option<&[&'e str]> { (*self).required_unless() }
53 fn is_set(&self, a: ArgSettings) -> bool { (*self).is_set(a) }
54 fn set(&mut self, _: ArgSettings) { panic!(INTERNAL_ERROR_MSG) }
55 fn has_switch(&self) -> bool { (*self).has_switch() }
56 fn max_vals(&self) -> Option<u64> { (*self).max_vals() }
57 fn min_vals(&self) -> Option<u64> { (*self).min_vals() }
58 fn num_vals(&self) -> Option<u64> { (*self).num_vals() }
59 fn possible_vals(&self) -> Option<&[&'e str]> { (*self).possible_vals() }
60 fn validator(&self) -> Option<&Rc<Fn(String) -> Result<(), String>>> { (*self).validator() }
61 fn validator_os(&self) -> Option<&Rc<Fn(&OsStr) -> Result<(), OsString>>> { (*self).validator_os() }
62 fn short(&self) -> Option<char> { (*self).short() }
63 fn long(&self) -> Option<&'e str> { (*self).long() }
64 fn val_delim(&self) -> Option<char> { (*self).val_delim() }
65 fn takes_value(&self) -> bool { (*self).takes_value() }
66 fn val_names(&self) -> Option<&VecMap<&'e str>> { (*self).val_names() }
67 fn help(&self) -> Option<&'e str> { (*self).help() }
68 fn long_help(&self) -> Option<&'e str> { (*self).long_help() }
69 fn default_val(&self) -> Option<&'e OsStr> { (*self).default_val() }
70 fn default_vals_ifs(&self) -> Option<map::Values<(&'n str, Option<&'e OsStr>, &'e OsStr)>> { (*self).default_vals_ifs() }
71 fn env<'s>(&'s self) -> Option<(&'n OsStr, Option<&'s OsString>)> { (*self).env() }
72 fn longest_filter(&self) -> bool { (*self).longest_filter() }
73 fn val_terminator(&self) -> Option<&'e str> { (*self).val_terminator() }
74}