1 use crate::symbol::{sym, Symbol};
5 use rustc_macros::HashStable_Generic;
7 /// The edition of the compiler. (See [RFC 2052](https://github.com/rust-lang/rfcs/blob/master/text/2052-epochs.md).)
8 #[derive(Clone, Copy, Hash, PartialEq, PartialOrd, Debug, Encodable, Decodable, Eq)]
9 #[derive(HashStable_Generic)]
11 // When adding new editions, be sure to do the following:
13 // - update the `ALL_EDITIONS` const
14 // - update the `EDITION_NAME_LIST` const
15 // - add a `rust_####()` function to the session
16 // - update the enum in Cargo's sources as well
18 // Editions *must* be kept in order, oldest to newest.
27 // Must be in order from oldest to newest.
28 pub const ALL_EDITIONS: &[Edition] =
29 &[Edition::Edition2015, Edition::Edition2018, Edition::Edition2021];
31 pub const EDITION_NAME_LIST: &str = "2015|2018|2021";
33 pub const DEFAULT_EDITION: Edition = Edition::Edition2015;
35 pub const LATEST_STABLE_EDITION: Edition = Edition::Edition2018;
37 impl fmt::Display for Edition {
38 fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
40 Edition::Edition2015 => "2015",
41 Edition::Edition2018 => "2018",
42 Edition::Edition2021 => "2021",
49 pub fn lint_name(&self) -> &'static str {
51 Edition::Edition2015 => "rust_2015_compatibility",
52 Edition::Edition2018 => "rust_2018_compatibility",
53 Edition::Edition2021 => "rust_2021_compatibility",
57 pub fn feature_name(&self) -> Symbol {
59 Edition::Edition2015 => sym::rust_2015_preview,
60 Edition::Edition2018 => sym::rust_2018_preview,
61 Edition::Edition2021 => sym::rust_2021_preview,
65 pub fn is_stable(&self) -> bool {
67 Edition::Edition2015 => true,
68 Edition::Edition2018 => true,
69 Edition::Edition2021 => false,
74 impl FromStr for Edition {
76 fn from_str(s: &str) -> Result<Self, ()> {
78 "2015" => Ok(Edition::Edition2015),
79 "2018" => Ok(Edition::Edition2018),
80 "2021" => Ok(Edition::Edition2021),