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author | Nadrieril Feneanar | 2019-12-20 19:39:16 +0000 |
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committer | GitHub | 2019-12-20 19:39:16 +0000 |
commit | de0dd59204e979e29445d634a0739394110261ef (patch) | |
tree | a75ce010c7ea771a03cb51cc2b828dad6ea1a9f7 /dhall/src/syntax/ast/label.rs | |
parent | 91ef0cf697d56c91a8d15937aa4669dc221cd6c1 (diff) | |
parent | 64cca1837cc97b7679c4e2ffd54a22ad50f05cfd (diff) |
Merge pull request #118 from Nadrieril/clarify-types
Clarify naming and file organization
Diffstat (limited to 'dhall/src/syntax/ast/label.rs')
-rw-r--r-- | dhall/src/syntax/ast/label.rs | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/dhall/src/syntax/ast/label.rs b/dhall/src/syntax/ast/label.rs new file mode 100644 index 0000000..43c3f53 --- /dev/null +++ b/dhall/src/syntax/ast/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() + } +} |