use crate::symbol::{sym, Symbol};
use std::fmt;
use std::str::FromStr;
use rustc_macros::HashStable_Generic;
#[derive(Clone, Copy, Hash, PartialEq, PartialOrd, Debug, Encodable, Decodable, Eq)]
#[derive(HashStable_Generic)]
pub enum Edition {
Edition2015,
Edition2018,
Edition2021,
Edition2024,
}
pub const ALL_EDITIONS: &[Edition] =
&[Edition::Edition2015, Edition::Edition2018, Edition::Edition2021, Edition::Edition2024];
pub const EDITION_NAME_LIST: &str = "2015|2018|2021|2024";
pub const DEFAULT_EDITION: Edition = Edition::Edition2015;
pub const LATEST_STABLE_EDITION: Edition = Edition::Edition2021;
impl fmt::Display for Edition {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
let s = match *self {
Edition::Edition2015 => "2015",
Edition::Edition2018 => "2018",
Edition::Edition2021 => "2021",
Edition::Edition2024 => "2024",
};
write!(f, "{s}")
}
}
impl Edition {
pub fn lint_name(self) -> &'static str {
match self {
Edition::Edition2015 => "rust_2015_compatibility",
Edition::Edition2018 => "rust_2018_compatibility",
Edition::Edition2021 => "rust_2021_compatibility",
Edition::Edition2024 => "rust_2024_compatibility",
}
}
pub fn feature_name(self) -> Symbol {
match self {
Edition::Edition2015 => sym::rust_2015_preview,
Edition::Edition2018 => sym::rust_2018_preview,
Edition::Edition2021 => sym::rust_2021_preview,
Edition::Edition2024 => sym::rust_2024_preview,
}
}
pub fn is_stable(self) -> bool {
match self {
Edition::Edition2015 => true,
Edition::Edition2018 => true,
Edition::Edition2021 => true,
Edition::Edition2024 => false,
}
}
pub fn is_rust_2015(self) -> bool {
self == Edition::Edition2015
}
pub fn at_least_rust_2018(self) -> bool {
self >= Edition::Edition2018
}
pub fn at_least_rust_2021(self) -> bool {
self >= Edition::Edition2021
}
pub fn at_least_rust_2024(self) -> bool {
self >= Edition::Edition2024
}
}
impl FromStr for Edition {
type Err = ();
fn from_str(s: &str) -> Result<Self, ()> {
match s {
"2015" => Ok(Edition::Edition2015),
"2018" => Ok(Edition::Edition2018),
"2021" => Ok(Edition::Edition2021),
"2024" => Ok(Edition::Edition2024),
_ => Err(()),
}
}
}