use the same PpResult type for all modes

src/taiko/mod.rs

@@ -190,7 +190,7 @@ mod tests {
 
         let result = TaikoPP::new(&map).mods(64).calculate();
 
-        println!("Stars: {}", result.stars);
-        println!("PP: {}", result.pp);
+        println!("Stars: {}", result.stars());
+        println!("PP: {}", result.pp());
     }
 }

src/taiko/pp.rs

@@ -1,10 +1,23 @@
-use crate::{Beatmap, Mods};
+use crate::{Beatmap, Mods, PpResult};
 
-/// Basic struct containing the result of a PP calculation.
-/// In osu!taiko's case, this will be just the pp value and the star value.
-pub struct PpResult {
-    pub pp: f32,
-    pub stars: f32,
+pub trait TaikoStarProvider {
+    fn attributes(self) -> Option<f32>;
+}
+
+impl TaikoStarProvider for f32 {
+    fn attributes(self) -> Option<f32> {
+        Some(self)
+    }
+}
+
+impl TaikoStarProvider for PpResult {
+    fn attributes(self) -> Option<f32> {
+        if let PpResult::Taiko { stars, .. } = self {
+            Some(stars)
+        } else {
+            None
+        }
+    }
 }
 
 /// Calculator for pp on osu!taiko maps.
@@ -36,12 +49,16 @@ impl<'m> TaikoPP<'m> {
         }
     }
 
-    /// If you already know the stars of the map with the current mods,
-    /// you should specify them so that they don't have to be calculated
-    /// again while calculating PP.
+    /// [`TaikoStarProvider`] is implemented by `f32`
+    /// and by [`PpResult`](crate::PpResult) meaning you can give the
+    /// result of a star calculation or a pp calculation.
+    /// If you already calculated the stars for the current map-mod combination,
+    /// be sure to put them in here so that they don't have to be recalculated.
     #[inline]
-    pub fn stars(mut self, stars: f32) -> Self {
-        self.stars.replace(stars);
+    pub fn stars(mut self, stars: impl TaikoStarProvider) -> Self {
+        if let Some(stars) = stars.attributes() {
+            self.stars.replace(stars);
+        }
 
         self
     }
@@ -109,7 +126,7 @@ impl<'m> TaikoPP<'m> {
 
         let pp = (strain_value.powf(1.1) + acc_value.powf(1.1)).powf(1.0 / 1.1) * multiplier;
 
-        PpResult { stars, pp }
+        PpResult::Taiko { stars, pp }
     }
 
     fn compute_strain_value(&self, stars: f32) -> f32 {