Add TokenText

crates/syntax/src/token_text.rs

@@ -0,0 +1,77 @@
+//! Yet another version of owned string, backed by a syntax tree token.
+
+use std::{cmp::Ordering, fmt, ops};
+
+pub struct TokenText(pub(crate) rowan::GreenToken);
+
+impl TokenText {
+    pub fn as_str(&self) -> &str {
+        self.0.text()
+    }
+}
+
+impl ops::Deref for TokenText {
+    type Target = str;
+
+    fn deref(&self) -> &str {
+        self.as_str()
+    }
+}
+impl AsRef<str> for TokenText {
+    fn as_ref(&self) -> &str {
+        self.as_str()
+    }
+}
+
+impl From<TokenText> for String {
+    fn from(token_text: TokenText) -> Self {
+        token_text.as_str().into()
+    }
+}
+
+impl PartialEq<&'_ str> for TokenText {
+    fn eq(&self, other: &&str) -> bool {
+        self.as_str() == *other
+    }
+}
+impl PartialEq<TokenText> for &'_ str {
+    fn eq(&self, other: &TokenText) -> bool {
+        other == self
+    }
+}
+impl PartialEq<String> for TokenText {
+    fn eq(&self, other: &String) -> bool {
+        self.as_str() == other.as_str()
+    }
+}
+impl PartialEq<TokenText> for String {
+    fn eq(&self, other: &TokenText) -> bool {
+        other == self
+    }
+}
+impl PartialEq for TokenText {
+    fn eq(&self, other: &TokenText) -> bool {
+        self.as_str() == other.as_str()
+    }
+}
+impl Eq for TokenText {}
+impl Ord for TokenText {
+    fn cmp(&self, other: &Self) -> Ordering {
+        self.as_str().cmp(other.as_str())
+    }
+}
+impl PartialOrd for TokenText {
+    fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
+        Some(self.cmp(other))
+    }
+}
+impl fmt::Display for TokenText {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        fmt::Display::fmt(self.as_str(), f)
+    }
+}
+impl fmt::Debug for TokenText {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        fmt::Debug::fmt(self.as_str(), f)
+    }
+}