1 files changed, 25 insertions, 0 deletions
diff --git a/third_party/rust/fluent-syntax/src/parser/slice.rs b/third_party/rust/fluent-syntax/src/parser/slice.rs
new file mode 100644
index 0000000000..d44f8251fe
--- /dev/null
+++ b/third_party/rust/fluent-syntax/src/parser/slice.rs
@@ -0,0 +1,25 @@
+use std::ops::Range;
+pub trait Slice<'s>: AsRef<str> + Clone + PartialEq {
+    fn slice(&self, range: Range<usize>) -> Self;
+    fn trim(&mut self);
+}
+
+impl<'s> Slice<'s> for String {
+    fn slice(&self, range: Range<usize>) -> Self {
+        self[range].to_string()
+    }
+
+    fn trim(&mut self) {
+        *self = self.trim_end().to_string();
+    }
+}
+
+impl<'s> Slice<'s> for &'s str {
+    fn slice(&self, range: Range<usize>) -> Self {
+        &self[range]
+    }
+
+    fn trim(&mut self) {
+        *self = self.trim_end();
+    }
+}