feat(picker): add `is_empty` method and refactor `if let` chains

Refactor multiple `if let` patterns in macros to use the let-chain
syntax for improved readability

1 files changed, 17 insertions, 0 deletions

diff --git a/mingling_picker/src/picker.rs b/mingling_picker/src/picker.rs
index f8d3cb1..01bebc7 100644
--- a/mingling_picker/src/picker.rs
+++ b/mingling_picker/src/picker.rs
@@ -81,6 +81,23 @@ impl<'a> Picker<'a> {
         }
     }
 
+    /// Returns `true` if the picker contains no arguments.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use mingling_picker::Picker;
+    ///
+    /// let empty: Picker = Picker::from(&[][..]);
+    /// assert!(empty.is_empty());
+    ///
+    /// let args = Picker::from(&["hello"][..]);
+    /// assert!(!args.is_empty());
+    /// ```
+    pub fn is_empty(&self) -> bool {
+        self.len() == 0
+    }
+
     /// Returns an iterator over the arguments, yielding owned `String` values.
     ///
     /// # Examples