Unnamed repository; edit this file 'description' to name the repository.
Diffstat (limited to 'crates/parser/src/edition.rs')
| -rw-r--r-- | crates/parser/src/edition.rs | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/crates/parser/src/edition.rs b/crates/parser/src/edition.rs new file mode 100644 index 0000000000..26178544f9 --- /dev/null +++ b/crates/parser/src/edition.rs @@ -0,0 +1,55 @@ +//! The edition of the Rust language used in a crate. +// Ideally this would be defined in the span crate, but the dependency chain is all over the place +// wrt to span, parser and syntax. +use std::fmt; + +#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)] +pub enum Edition { + Edition2015, + Edition2018, + Edition2021, + Edition2024, +} + +impl Edition { + pub const CURRENT: Edition = Edition::Edition2021; + pub const DEFAULT: Edition = Edition::Edition2015; +} + +#[derive(Debug)] +pub struct ParseEditionError { + invalid_input: String, +} + +impl std::error::Error for ParseEditionError {} +impl fmt::Display for ParseEditionError { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + write!(f, "invalid edition: {:?}", self.invalid_input) + } +} + +impl std::str::FromStr for Edition { + type Err = ParseEditionError; + + fn from_str(s: &str) -> Result<Self, Self::Err> { + let res = match s { + "2015" => Edition::Edition2015, + "2018" => Edition::Edition2018, + "2021" => Edition::Edition2021, + "2024" => Edition::Edition2024, + _ => return Err(ParseEditionError { invalid_input: s.to_owned() }), + }; + Ok(res) + } +} + +impl fmt::Display for Edition { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.write_str(match self { + Edition::Edition2015 => "2015", + Edition::Edition2018 => "2018", + Edition::Edition2021 => "2021", + Edition::Edition2024 => "2024", + }) + } +} |