diff options
Diffstat (limited to 'vendor/rustversion/src/release.rs')
-rw-r--r-- | vendor/rustversion/src/release.rs | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/vendor/rustversion/src/release.rs b/vendor/rustversion/src/release.rs new file mode 100644 index 000000000..3f421c657 --- /dev/null +++ b/vendor/rustversion/src/release.rs @@ -0,0 +1,34 @@ +use crate::error::{Error, Result}; +use crate::iter::Iter; +use crate::token; +use proc_macro::Group; + +#[derive(Copy, Clone, Debug, PartialEq, Eq, PartialOrd, Ord)] +pub struct Release { + pub minor: u16, + pub patch: Option<u16>, +} + +pub fn parse(paren: Group, iter: Iter) -> Result<Release> { + try_parse(iter).map_err(|_| Error::group(paren, "expected rustc release number, like 1.31")) +} + +fn try_parse(iter: Iter) -> Result<Release, ()> { + let major_minor = token::parse_literal(iter).map_err(drop)?; + let string = major_minor.to_string(); + + if !string.starts_with("1.") { + return Err(()); + } + + let minor: u16 = string[2..].parse().map_err(drop)?; + + let patch = if token::parse_optional_punct(iter, '.').is_some() { + let int = token::parse_literal(iter).map_err(drop)?; + Some(int.to_string().parse().map_err(drop)?) + } else { + None + }; + + Ok(Release { minor, patch }) +} |