build(rust): vendor rnix parser crate

third_party/crates/text-size-1.1.1/tests/constructors.rs

@@ -0,0 +1,24 @@
+use text_size::TextSize;
+
+#[derive(Copy, Clone)]
+struct BadRope<'a>(&'a [&'a str]);
+
+impl BadRope<'_> {
+    fn text_len(self) -> TextSize {
+        self.0.iter().copied().map(TextSize::of).sum()
+    }
+}
+
+#[test]
+fn main() {
+    let x: char = 'c';
+    let _ = TextSize::of(x);
+
+    let x: &str = "hello";
+    let _ = TextSize::of(x);
+
+    let x: &String = &"hello".into();
+    let _ = TextSize::of(x);
+
+    let _ = BadRope(&[""]).text_len();
+}