osu: ignore Hold objects instead of panicking

README.md

@@ -9,23 +9,22 @@ Conversions are generally not supported.
 use std::fs::File;
 use rosu_pp::{Beatmap, BeatmapExt, GameMode, OsuPP, TaikoPP};
 
-fn main() {
-    let file = match File::open("/path/to/file.osu") {
+let file = match File::open("/path/to/file.osu") {
     Ok(file) => file,
     Err(why) => panic!("Could not open file: {}", why),
-    };
+};
 
-    // Parse the map yourself
-    let map = match Beatmap::parse(file) {
+// Parse the map yourself
+let map = match Beatmap::parse(file) {
     Ok(map) => map,
     Err(why) => panic!("Error while parsing map: {}", why),
-    };
+};
 
-    // The different modes make things annoying because their
-    // pp calculations require different parameters.
-    // For now, you will have to match on the mode yourself
-    // to be able to set all options for pp calculation.
-    match map.mode {
+// The different modes make things annoying because their
+// pp calculations require different parameters.
+// For now, you will have to match on the mode yourself
+// to be able to set all options for pp calculation.
+match map.mode {
     GameMode::STD => {
         let result = OsuPP::new(&map)
             .mods(24) // HDHR
@@ -63,15 +62,14 @@ fn main() {
         println!("Stars: {} | PP: {}", result.stars(), result.pp());
     }
     GameMode::MNA | GameMode::CTB => panic!("do your thing"),
-    }
-
-    // If all you want is the map's stars or max pp,
-    // you can make use of the BeatmapExt trait.
-    let stars = map.stars(16, None); // HR
-    let max_pp = map.max_pp(16);
-
-    println!("Stars: {} | Max PP: {}", stars, max_pp);
 }
+
+// If all you want is the map's stars or max pp,
+// you can make use of the BeatmapExt trait.
+let stars = map.stars(16, None); // HR
+let max_pp = map.max_pp(16);
+
+println!("Stars: {} | Max PP: {}", stars, max_pp);
 ```
 
 #### osu!standard versions

src/lib.rs

@@ -7,7 +7,6 @@
 //! use std::fs::File;
 //! use rosu_pp::{Beatmap, BeatmapExt, GameMode, OsuPP, TaikoPP};
 //!
-//! fn main() {
 //! let file = match File::open("/path/to/file.osu") {
 //!     Ok(file) => file,
 //!     Err(why) => panic!("Could not open file: {}", why),
@@ -69,7 +68,6 @@
 //! let max_pp = map.max_pp(16);
 //!
 //! println!("Stars: {} | Max PP: {}", stars, max_pp);
-//! }
 //! ```
 //!
 //! ### osu!standard versions

src/osu/versions/all_included/mod.rs

@@ -44,7 +44,7 @@ pub fn stars(
         .hit_objects
         .iter()
         .take(take)
-        .map(|h| OsuObject::new(h, map, &attributes));
+        .filter_map(|h| OsuObject::new(h, map, &attributes));
 
     let mut skills = vec![Skill::new(SkillKind::Aim), Skill::new(SkillKind::Speed)];
 

src/osu/versions/all_included/osu_object.rs

@@ -42,14 +42,18 @@ pub(crate) enum OsuObject {
 }
 
 impl OsuObject {
-    pub(crate) fn new(h: &HitObject, map: &Beatmap, attributes: &BeatmapAttributes) -> Self {
+    pub(crate) fn new(
+        h: &HitObject,
+        map: &Beatmap,
+        attributes: &BeatmapAttributes,
+    ) -> Option<Self> {
         let pos = h.pos;
         let time = h.start_time;
 
         let scale = (1.0 - 0.7 * (attributes.cs - 5.0) / 5.0) / 2.0;
         let mut stack_height = 0.0;
 
-        match &h.kind {
+        let obj = match &h.kind {
             HitObjectKind::Circle => Self::Circle {
                 pos,
                 time,
@@ -303,8 +307,10 @@ impl OsuObject {
                 }
             }
             HitObjectKind::Spinner { .. } => Self::Spinner { pos, time },
-            HitObjectKind::Hold { .. } => panic!("found Hold object in osu!standard file"),
-        }
+            HitObjectKind::Hold { .. } => return None,
+        };
+
+        Some(obj)
     }
 
     #[inline]

src/osu/versions/no_leniency/mod.rs

@@ -66,7 +66,7 @@ pub fn stars(
     let mut slider_state = SliderState::new(map);
     let mut ticks_buf = Vec::new();
 
-    let mut hit_objects = map.hit_objects.iter().take(take).map(|h| {
+    let mut hit_objects = map.hit_objects.iter().take(take).filter_map(|h| {
         OsuObject::new(
             h,
             map,

src/osu/versions/no_leniency/osu_object.rs

@@ -21,10 +21,10 @@ impl OsuObject {
         ticks: &mut Vec<f32>,
         attributes: &mut DifficultyAttributes,
         slider_state: &mut SliderState,
-    ) -> Self {
+    ) -> Option<Self> {
         attributes.max_combo += 1; // hitcircle, slider head, or spinner
 
-        match &h.kind {
+        let obj = match &h.kind {
             HitObjectKind::Circle => {
                 attributes.n_circles += 1;
 
@@ -168,8 +168,10 @@ impl OsuObject {
                     travel_dist: None,
                 }
             }
-            HitObjectKind::Hold { .. } => panic!("found Hold object in osu!standard file"),
-        }
+            HitObjectKind::Hold { .. } => return None,
+        };
+
+        Some(obj)
     }
 
     #[inline]

src/osu/versions/no_sliders_no_leniency/mod.rs

@@ -64,32 +64,36 @@ pub fn stars(
     let mut n_spinners = 0;
     let mut state = SliderState::new(&map);
 
-    let mut hit_objects = map.hit_objects.iter().take(take).map(|h| match &h.kind {
+    let mut hit_objects = map
+        .hit_objects
+        .iter()
+        .take(take)
+        .filter_map(|h| match &h.kind {
             HitObjectKind::Circle => {
                 max_combo += 1;
                 n_circles += 1;
 
-            Cow::Borrowed(h)
+                Some(Cow::Borrowed(h))
             }
             HitObjectKind::Slider {
                 pixel_len, repeats, ..
             } => {
                 max_combo += state.count_ticks(h.start_time, *pixel_len, *repeats, &map);
 
-            Cow::Owned(HitObject {
+                Some(Cow::Owned(HitObject {
                     pos: h.pos,
                     start_time: h.start_time,
                     kind: HitObjectKind::Circle,
                     sound: h.sound,
-            })
+                }))
             }
             HitObjectKind::Spinner { .. } => {
                 max_combo += 1;
                 n_spinners += 1;
 
-            Cow::Borrowed(h)
+                Some(Cow::Borrowed(h))
             }
-        HitObjectKind::Hold { .. } => panic!("found Hold object in osu!standard map"),
+            HitObjectKind::Hold { .. } => None,
         });
 
     let mut aim = Skill::new(SkillKind::Aim);

src/taiko/hitobject_rhythm.rs

@@ -4,7 +4,7 @@ use std::cmp::Ordering;
 
 static COMMON_RHYTHMS: [HitObjectRhythm; 9] = [
     HitObjectRhythm {
-        ratio: 1.0 / 1.0,
+        ratio: 1.0,
         difficulty: 0.0,
     },
     HitObjectRhythm {