3 files changed, 7 insertions, 19 deletions
diff --git a/src/statistics/damage.rs b/src/statistics/damage.rs
index fdf723f..0fcbf9b 100644
--- a/src/statistics/damage.rs
+++ b/src/statistics/damage.rs
@@ -36,7 +36,7 @@ impl Monoid for Damage {
 }
 
 /// Provides access to the damage log.
-#[derive(Clone)]
+#[derive(Clone, Default)]
 pub struct DamageLog {
     inner: RecordFunc<u64, Meta, Damage>,
 }
diff --git a/src/statistics/math.rs b/src/statistics/math.rs
index 3760ca3..6e7e666 100644
--- a/src/statistics/math.rs
+++ b/src/statistics/math.rs
@@ -45,7 +45,7 @@ struct Record<X, T, D> {
 /// * `T` tag for each data point. Can be arbitrary.
 /// * `D` actual data. Must be [`Monoid`](trait.Monoid.html), so that it can be
 ///   summed up.
-#[derive(Clone)]
+#[derive(Clone, Default)]
 pub struct RecordFunc<X, T, D> {
     data: Vec<Record<X, T, D>>,
 }
@@ -84,6 +84,11 @@ where
         self.data.len()
     }
 
+    /// Check whether there are no records.
+    pub fn is_emtpy(&self) -> bool {
+        self.data.is_empty()
+    }
+
     /// Get the absolute value at the specific point.
     #[inline]
     pub fn get(&self, x: &X) -> D {
diff --git a/src/statistics/trackers.rs b/src/statistics/trackers.rs
index ce87f3d..11e51f2 100644
--- a/src/statistics/trackers.rs
+++ b/src/statistics/trackers.rs
@@ -18,26 +18,12 @@
 //! trackers on the same log.
 use std::collections::HashMap;
 use std::error::Error;
-use std::hash::Hash;
 
 use super::super::{Event, EventKind, Log};
 use super::boon::BoonQueue;
 use super::damage::{DamageLog, DamageType};
 use super::gamedata::{self, Mechanic, Trigger};
 
-// A support macro to introduce a new block.
-//
-// Doesn't really require a macro, but it's nicer to look at
-//   with! { foo = bar }
-// rather than
-//   { let foo = bar; ... }
-macro_rules! with {
-    ($name:ident = $expr:expr => $bl:block) => {{
-        let $name = $expr;
-        $bl
-    }};
-}
-
 /// A tracker.
 ///
 /// A tracker should be responsible for tracking a single statistic. Each
@@ -322,9 +308,6 @@ impl Tracker for BoonTracker {
     type Error = !;
 
     fn feed(&mut self, event: &Event) -> Result<(), Self::Error> {
-        if event.kind.destination_agent_addr() != Some(self.agent_addr) {
-            return Ok(());
-        }
 
         let delta_t = event.time - self.last_time;
         if self.next_update != 0 && delta_t > self.next_update {