feat: add last method to gradual perf calc

src/catch/gradual_performance.rs

@@ -122,6 +122,11 @@ impl<'map> CatchGradualPerformanceAttributes<'map> {
         self.nth(state, 0)
     }
 
+    /// Process all remaining hit objects and calculate the final performance attributes.
+    pub fn last(&mut self, state: CatchScoreState) -> Option<CatchPerformanceAttributes> {
+        self.nth(state, usize::MAX)
+    }
+
     /// Process everything up the the next `n`th hit object and calculate the performance
     /// attributes for the resulting score state.
     ///

src/mania/gradual_performance.rs

@@ -100,6 +100,11 @@ impl<'map> ManiaGradualPerformanceAttributes<'map> {
         self.nth(state, 0)
     }
 
+    /// Process all remaining hit objects and calculate the final performance attributes.
+    pub fn last(&mut self, state: ManiaScoreState) -> Option<ManiaPerformanceAttributes> {
+        self.nth(state, usize::MAX)
+    }
+
     /// Process everything up the the next `n`th hit object and calculate the performance
     /// attributes for the resulting score state.
     ///

src/osu/gradual_performance.rs

@@ -114,6 +114,11 @@ impl<'map> OsuGradualPerformanceAttributes<'map> {
         self.nth(state, 0)
     }
 
+    /// Process all remaining hit objects and calculate the final performance attributes.
+    pub fn last(&mut self, state: OsuScoreState) -> Option<OsuPerformanceAttributes> {
+        self.nth(state, usize::MAX)
+    }
+
     /// Process everything up the the next `n`th hit object and calculate the performance
     /// attributes for the resulting score state.
     ///

src/taiko/gradual_performance.rs

@@ -112,6 +112,11 @@ impl<'map> TaikoGradualPerformanceAttributes<'map> {
         self.nth(state, 0)
     }
 
+    /// Process all remaining hit objects and calculate the final performance attributes.
+    pub fn last(&mut self, state: TaikoScoreState) -> Option<TaikoPerformanceAttributes> {
+        self.nth(state, usize::MAX)
+    }
+
     /// Process everything up the the next `n`th hit object and calculate the performance
     /// attributes for the resulting score state.
     ///