1 use crate::symbol::{Symbol, sym};
5 use rustc_macros::HashStable_Generic;
7 /// The edition of the compiler (RFC 2052)
8 #[derive(Clone, Copy, Hash, PartialEq, PartialOrd, Debug,
9 RustcEncodable, RustcDecodable, Eq, HashStable_Generic)]
11 // editions must be kept in order, oldest to newest
18 // when adding new editions, be sure to update:
20 // - Update the `ALL_EDITIONS` const
21 // - Update the EDITION_NAME_LIST const
22 // - add a `rust_####()` function to the session
23 // - update the enum in Cargo's sources as well
26 // must be in order from oldest to newest
27 pub const ALL_EDITIONS: &[Edition] = &[Edition::Edition2015, Edition::Edition2018];
29 pub const EDITION_NAME_LIST: &str = "2015|2018";
31 pub const DEFAULT_EDITION: Edition = Edition::Edition2015;
33 impl fmt::Display for Edition {
34 fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
36 Edition::Edition2015 => "2015",
37 Edition::Edition2018 => "2018",
44 pub fn lint_name(&self) -> &'static str {
46 Edition::Edition2015 => "rust_2015_compatibility",
47 Edition::Edition2018 => "rust_2018_compatibility",
51 pub fn feature_name(&self) -> Symbol {
53 Edition::Edition2015 => sym::rust_2015_preview,
54 Edition::Edition2018 => sym::rust_2018_preview,
58 pub fn is_stable(&self) -> bool {
60 Edition::Edition2015 => true,
61 Edition::Edition2018 => true,
66 impl FromStr for Edition {
68 fn from_str(s: &str) -> Result<Self, ()> {
70 "2015" => Ok(Edition::Edition2015),
71 "2018" => Ok(Edition::Edition2018),