Merge #1

1: Add extend_to for TextRange r=edwin0cheng a=edwin0cheng

~~This PR added a `convex_hull` function for joining to two `TextUnit` together.~~

This PR added a `extend_to` function for joining to two `TextUnit` together.

Co-authored-by: Edwin Cheng <[email protected]>

Author: bors[bot]

src/lib.rs

@@ -299,6 +299,15 @@ impl TextRange {
         }
     }
 
+    // BREAK: pass by value
+    #[inline(always)]
+    /// The smallest range that contains both ranges
+    pub fn extend_to(&self, other: &TextRange) -> TextRange {
+        let start = self.start().min(other.start());
+        let end = self.end().max(other.end());
+        TextRange::from_to(start, end)
+    }
+
     // BREAK: pass by value
     #[inline(always)]
     pub fn contains(&self, offset: TextUnit) -> bool {
@@ -433,6 +442,13 @@ mod tests {
         assert_eq!(r(1, 2).intersection(&r(3, 4)), None);
     }
 
+    #[test]
+    fn check_extend_to() {
+        assert_eq!(r(1, 2).extend_to(&r(2, 3)), r(1, 3));
+        assert_eq!(r(1, 5).extend_to(&r(2, 3)), r(1, 5));
+        assert_eq!(r(1, 2).extend_to(&r(4, 5)), r(1, 5));
+    }
+
     #[test]
     fn check_contains() {
         assert!(!r(1, 3).contains(0.into()));