1use std::fmt;
2use std::str::FromStr;
3
4use rustc_macros::{Decodable, Encodable, HashStable_Generic};
5
6#[derive(Clone, Copy, Hash, PartialEq, PartialOrd, Debug, Encodable, Decodable, Eq)]
8#[derive(HashStable_Generic)]
9pub enum Edition {
10 Edition2015,
20 Edition2018,
22 Edition2021,
24 Edition2024,
26 EditionFuture,
37}
38
39pub const ALL_EDITIONS: &[Edition] = &[
41 Edition::Edition2015,
42 Edition::Edition2018,
43 Edition::Edition2021,
44 Edition::Edition2024,
45 Edition::EditionFuture,
46];
47
48pub const EDITION_NAME_LIST: &str = "2015|2018|2021|2024";
49
50pub const DEFAULT_EDITION: Edition = Edition::Edition2015;
51
52pub const LATEST_STABLE_EDITION: Edition = Edition::Edition2024;
53
54impl fmt::Display for Edition {
55 fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
56 let s = match *self {
57 Edition::Edition2015 => "2015",
58 Edition::Edition2018 => "2018",
59 Edition::Edition2021 => "2021",
60 Edition::Edition2024 => "2024",
61 Edition::EditionFuture => "future",
62 };
63 write!(f, "{s}")
64 }
65}
66
67impl Edition {
68 pub fn lint_name(self) -> &'static str {
69 match self {
70 Edition::Edition2015 => "rust_2015_compatibility",
71 Edition::Edition2018 => "rust_2018_compatibility",
72 Edition::Edition2021 => "rust_2021_compatibility",
73 Edition::Edition2024 => "rust_2024_compatibility",
74 Edition::EditionFuture => "edition_future_compatibility",
75 }
76 }
77
78 pub fn is_stable(self) -> bool {
79 match self {
80 Edition::Edition2015 => true,
81 Edition::Edition2018 => true,
82 Edition::Edition2021 => true,
83 Edition::Edition2024 => true,
84 Edition::EditionFuture => false,
85 }
86 }
87
88 pub fn is_rust_2015(self) -> bool {
90 self == Edition::Edition2015
91 }
92
93 pub fn at_least_rust_2018(self) -> bool {
95 self >= Edition::Edition2018
96 }
97
98 pub fn at_least_rust_2021(self) -> bool {
100 self >= Edition::Edition2021
101 }
102
103 pub fn at_least_rust_2024(self) -> bool {
105 self >= Edition::Edition2024
106 }
107
108 pub fn at_least_edition_future(self) -> bool {
110 self >= Edition::EditionFuture
111 }
112}
113
114impl FromStr for Edition {
115 type Err = ();
116 fn from_str(s: &str) -> Result<Self, ()> {
117 match s {
118 "2015" => Ok(Edition::Edition2015),
119 "2018" => Ok(Edition::Edition2018),
120 "2021" => Ok(Edition::Edition2021),
121 "2024" => Ok(Edition::Edition2024),
122 "future" => Ok(Edition::EditionFuture),
123 _ => Err(()),
124 }
125 }
126}