74 lines
2.0 KiB
Rust
74 lines
2.0 KiB
Rust
use crate::symbol::{sym, Symbol};
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use std::fmt;
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use std::str::FromStr;
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use rustc_macros::HashStable_Generic;
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/// The edition of the compiler (RFC 2052)
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#[derive(Clone, Copy, Hash, PartialEq, PartialOrd, Debug, RustcEncodable, RustcDecodable, Eq)]
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#[derive(HashStable_Generic)]
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pub enum Edition {
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// editions must be kept in order, oldest to newest
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/// The 2015 edition
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Edition2015,
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/// The 2018 edition
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Edition2018,
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// when adding new editions, be sure to update:
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//
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// - Update the `ALL_EDITIONS` const
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// - Update the EDITION_NAME_LIST const
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// - add a `rust_####()` function to the session
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// - update the enum in Cargo's sources as well
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}
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// must be in order from oldest to newest
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pub const ALL_EDITIONS: &[Edition] = &[Edition::Edition2015, Edition::Edition2018];
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pub const EDITION_NAME_LIST: &str = "2015|2018";
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pub const DEFAULT_EDITION: Edition = Edition::Edition2015;
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impl fmt::Display for Edition {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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let s = match *self {
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Edition::Edition2015 => "2015",
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Edition::Edition2018 => "2018",
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};
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write!(f, "{}", s)
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}
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}
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impl Edition {
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pub fn lint_name(&self) -> &'static str {
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match *self {
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Edition::Edition2015 => "rust_2015_compatibility",
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Edition::Edition2018 => "rust_2018_compatibility",
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}
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}
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pub fn feature_name(&self) -> Symbol {
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match *self {
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Edition::Edition2015 => sym::rust_2015_preview,
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Edition::Edition2018 => sym::rust_2018_preview,
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}
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}
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pub fn is_stable(&self) -> bool {
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match *self {
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Edition::Edition2015 => true,
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Edition::Edition2018 => true,
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}
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}
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}
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impl FromStr for Edition {
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type Err = ();
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fn from_str(s: &str) -> Result<Self, ()> {
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match s {
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"2015" => Ok(Edition::Edition2015),
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"2018" => Ok(Edition::Edition2018),
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_ => Err(()),
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}
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}
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}
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