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102 lines
3.0 KiB
Rust
102 lines
3.0 KiB
Rust
use std::fmt;
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use std::str::FromStr;
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use rustc_macros::{Decodable, Encodable, HashStable_Generic};
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/// The edition of the compiler. (See [RFC 2052](https://github.com/rust-lang/rfcs/blob/master/text/2052-epochs.md).)
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#[derive(Clone, Copy, Hash, PartialEq, PartialOrd, Debug, Encodable, Decodable, Eq)]
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#[derive(HashStable_Generic)]
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pub enum Edition {
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// When adding new editions, be sure to do the following:
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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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// 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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/// The 2021 edition
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Edition2021,
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/// The 2024 edition
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Edition2024,
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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] =
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&[Edition::Edition2015, Edition::Edition2018, Edition::Edition2021, Edition::Edition2024];
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pub const EDITION_NAME_LIST: &str = "2015|2018|2021|2024";
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pub const DEFAULT_EDITION: Edition = Edition::Edition2015;
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pub const LATEST_STABLE_EDITION: Edition = Edition::Edition2021;
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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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Edition::Edition2021 => "2021",
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Edition::Edition2024 => "2024",
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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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Edition::Edition2021 => "rust_2021_compatibility",
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Edition::Edition2024 => "rust_2024_compatibility",
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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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Edition::Edition2021 => true,
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Edition::Edition2024 => false,
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}
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}
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/// Is this edition 2015?
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pub fn is_rust_2015(self) -> bool {
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self == Edition::Edition2015
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}
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/// Are we allowed to use features from the Rust 2018 edition?
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pub fn at_least_rust_2018(self) -> bool {
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self >= Edition::Edition2018
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}
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/// Are we allowed to use features from the Rust 2021 edition?
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pub fn at_least_rust_2021(self) -> bool {
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self >= Edition::Edition2021
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}
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/// Are we allowed to use features from the Rust 2024 edition?
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pub fn at_least_rust_2024(self) -> bool {
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self >= Edition::Edition2024
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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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"2021" => Ok(Edition::Edition2021),
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"2024" => Ok(Edition::Edition2024),
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_ => Err(()),
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}
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}
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}
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