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.
25 // Must be in order from oldest to newest.
26 pub const ALL_EDITIONS: &[Edition] = &[Edition::Edition2015, Edition::Edition2018];
28 pub const EDITION_NAME_LIST: &str = "2015|2018";
30 pub const DEFAULT_EDITION: Edition = Edition::Edition2015;
32 impl fmt::Display for Edition {
33 fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
35 Edition::Edition2015 => "2015",
36 Edition::Edition2018 => "2018",
43 pub fn lint_name(&self) -> &'static str {
45 Edition::Edition2015 => "rust_2015_compatibility",
46 Edition::Edition2018 => "rust_2018_compatibility",
50 pub fn feature_name(&self) -> Symbol {
52 Edition::Edition2015 => sym::rust_2015_preview,
53 Edition::Edition2018 => sym::rust_2018_preview,
57 pub fn is_stable(&self) -> bool {
59 Edition::Edition2015 => true,
60 Edition::Edition2018 => true,
65 impl FromStr for Edition {
67 fn from_str(s: &str) -> Result<Self, ()> {
69 "2015" => Ok(Edition::Edition2015),
70 "2018" => Ok(Edition::Edition2018),