diff options
author | Nadrieril | 2019-05-04 12:38:36 +0200 |
---|---|---|
committer | Nadrieril | 2019-05-04 12:38:36 +0200 |
commit | 45be2ff1f5bb3d6e0faa098402adf985b3d5e7ca (patch) | |
tree | a7b15b0bf4b5b211eb42a559bc3cfde9a14b7749 /dhall_syntax/src/label.rs | |
parent | ca4e2b39c838cde6da835470699579e8eddc1535 (diff) |
Rename dhall_core to dhall_syntax
Diffstat (limited to 'dhall_syntax/src/label.rs')
-rw-r--r-- | dhall_syntax/src/label.rs | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/dhall_syntax/src/label.rs b/dhall_syntax/src/label.rs new file mode 100644 index 0000000..43c3f53 --- /dev/null +++ b/dhall_syntax/src/label.rs @@ -0,0 +1,34 @@ +use std::rc::Rc; + +// The type for labels throughout the AST +// It owns the data because otherwise lifetimes would make recursive imports impossible +#[derive(Debug, Clone, PartialEq, Eq, Hash, PartialOrd, Ord)] +pub struct Label(Rc<str>); + +impl From<String> for Label { + fn from(s: String) -> Self { + let s: &str = &s; + Label(s.into()) + } +} + +impl<'a> From<&'a str> for Label { + fn from(s: &'a str) -> Self { + Label(Rc::from(s)) + } +} + +impl From<&Label> for String { + fn from(x: &Label) -> String { + x.0.as_ref().to_owned() + } +} + +impl Label { + pub fn from_str(s: &str) -> Label { + Label(s.into()) + } + pub fn as_ref(&self) -> &str { + self.0.as_ref() + } +} |