osu: remove pp builder method for star_function

osu/src/pp.rs

@@ -30,8 +30,6 @@ pub struct PpCalculator<'m> {
     n100: Option<usize>,
     n50: Option<usize>,
     n_misses: usize,
-
-    stars_func: Option<Box<dyn Fn(&Beatmap, u32) -> Attributes>>,
 }
 
 impl<'m> PpCalculator<'m> {
@@ -48,8 +46,6 @@ impl<'m> PpCalculator<'m> {
             n100: None,
             n50: None,
             n_misses: 0,
-
-            stars_func: None,
         }
     }
 
@@ -102,13 +98,6 @@ impl<'m> PpCalculator<'m> {
         self
     }
 
-    #[inline]
-    pub fn stars_function(mut self, func: impl Fn(&Beatmap, u32) -> Attributes + 'static) -> Self {
-        self.stars_func.replace(Box::new(func));
-
-        self
-    }
-
     /// Generate the hit results with respect to the given accuracy between `0` and `100`.
     ///
     /// Be sure to set `misses` beforehand!
@@ -154,18 +143,13 @@ impl<'m> PpCalculator<'m> {
         self
     }
 
-    pub fn calculate(mut self) -> PpResult {
+    /// Consume the calculator and calculate the pp.
+    ///
+    /// `stars_func` will be used to calculate stars and other necessary attributes if not already given.
+    pub fn calculate(mut self, stars_func: impl FnOnce(&Beatmap, u32) -> Attributes) -> PpResult {
         if self.attributes.is_none() {
-            let stars_func = self
-                .stars_func
-                .take()
-                .unwrap_or_else(|| Box::new(super::no_sliders_no_leniency::stars));
-
-            let attribtes = stars_func(self.map, self.mods);
-
-            // println!("> stars={}", attribtes.stars);
-
-            self.attributes.replace(attribtes);
+            let attributes = stars_func(self.map, self.mods);
+            self.attributes.replace(attributes);
         }
 
         if self.acc.is_none() {

osu/src/versions/all_included/mod.rs

@@ -226,8 +226,8 @@ mod tests {
             Err(why) => panic!("Error while parsing map: {}", why),
         };
 
-        let calculator = PpCalculator::new(&map).mods(0).stars_function(stars);
-        let result = calculator.calculate();
+        let calculator = PpCalculator::new(&map).mods(0);
+        let result = calculator.calculate(stars);
 
         println!("PP: {}", result.pp);
     }

osu/src/versions/no_leniency/mod.rs

@@ -229,8 +229,8 @@ mod tests {
             Err(why) => panic!("Error while parsing map: {}", why),
         };
 
-        let calculator = PpCalculator::new(&map).mods(0).stars_function(stars);
-        let result = calculator.calculate();
+        let calculator = PpCalculator::new(&map).mods(0);
+        let result = calculator.calculate(stars);
 
         println!("PP: {}", result.pp);
     }

osu/src/versions/no_sliders_no_leniency/mod.rs

@@ -315,14 +315,13 @@ mod tests {
         };
 
         let calculator = PpCalculator::new(&map)
-            .stars_function(stars)
             // .misses(2)
             // .accuracy(96.78)
             // .combo(100)
             // .n100(0)
             .mods(0);
 
-        let result = calculator.calculate();
+        let result = calculator.calculate(stars);
 
         println!("Stars: {}", result.attributes.stars);
         println!("PP: {}", result.pp);