1 use crate::symbol::{sym, Symbol};
5 use rustc_macros::HashStable_Generic;
7 /// The edition of the compiler (RFC 2052)
8 #[derive(Clone, Copy, Hash, PartialEq, PartialOrd, Debug, Encodable, Decodable, Eq)]
9 #[derive(HashStable_Generic)]
11 // editions must be kept in order, oldest to newest
16 // when adding new editions, be sure to update:
18 // - Update the `ALL_EDITIONS` const
19 // - Update the EDITION_NAME_LIST const
20 // - add a `rust_####()` function to the session
21 // - update the enum in Cargo's sources as well
24 // must be in order from oldest to newest
25 pub const ALL_EDITIONS: &[Edition] = &[Edition::Edition2015, Edition::Edition2018];
27 pub const EDITION_NAME_LIST: &str = "2015|2018";
29 pub const DEFAULT_EDITION: Edition = Edition::Edition2015;
31 impl fmt::Display for Edition {
32 fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
34 Edition::Edition2015 => "2015",
35 Edition::Edition2018 => "2018",
42 pub fn lint_name(&self) -> &'static str {
44 Edition::Edition2015 => "rust_2015_compatibility",
45 Edition::Edition2018 => "rust_2018_compatibility",
49 pub fn feature_name(&self) -> Symbol {
51 Edition::Edition2015 => sym::rust_2015_preview,
52 Edition::Edition2018 => sym::rust_2018_preview,
56 pub fn is_stable(&self) -> bool {
58 Edition::Edition2015 => true,
59 Edition::Edition2018 => true,
64 impl FromStr for Edition {
66 fn from_str(s: &str) -> Result<Self, ()> {
68 "2015" => Ok(Edition::Edition2015),
69 "2018" => Ok(Edition::Edition2018),