From 3549dc50cb8cb03e1e6d0d8e0bbd9ad502d80d07 Mon Sep 17 00:00:00 2001
From: konsti <konstin@mailbox.org>
Date: Tue, 12 Mar 2024 14:48:43 +0100
Subject: [PATCH] feat: add `Range::is_empty()` (#189)

We use `Range::is_empty()` for special casing the empty version range in error messages. This mirrors std, which has `is_empty` methods on all of its collections: https://doc.rust-lang.org/nightly/std/?search=is_empty

Example usages:

https://github.com/astral-sh/uv/blob/8d721830db8ad75b8b7ef38edc0e346696c52e3d/crates/uv-resolver/src/pubgrub/report.rs#L553

https://github.com/astral-sh/uv/blob/8d721830db8ad75b8b7ef38edc0e346696c52e3d/crates/uv-resolver/src/pubgrub/report.rs#L565
---
 src/range.rs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/range.rs b/src/range.rs
index bbca4da2..a7eb0e82 100644
--- a/src/range.rs
+++ b/src/range.rs
@@ -119,6 +119,11 @@ impl<V> Range<V> {
             segments: SmallVec::one((Included(v1.into()), Excluded(v2.into()))),
         }
     }
+
+    /// Whether the set is empty, i.e. it has not ranges
+    pub fn is_empty(&self) -> bool {
+        self.segments.is_empty()
+    }
 }
 
 impl<V: Clone> Range<V> {