implement Debug for MersenneTwister

can't just derive it, because [_; 624] doesn't have a Debug
implementation

1 files changed, 11 insertions, 0 deletions

diff --git a/src/random.rs b/src/random.rs
index fcc1967..64944b7 100644
--- a/src/random.rs
+++ b/src/random.rs
@@ -1,4 +1,5 @@
 use rand::{Rand, Rng, SeedableRng};
+use std;
 
 pub struct MersenneTwister {
     state: [u32; 624],
@@ -65,3 +66,13 @@ impl Clone for MersenneTwister {
         MersenneTwister { state: self.state, index: self.index }
     }
 }
+
+impl std::fmt::Debug for MersenneTwister {
+    fn fmt (&self, f: &mut std::fmt::Formatter) -> Result<(), std::fmt::Error> {
+        try!(write!(f, "MersenneTwister {{ "));
+        try!(std::fmt::Debug::fmt(&&self.state[..], f));
+        try!(write!(f, ", "));
+        try!(std::fmt::Debug::fmt(&self.index, f));
+        write!(f, " }}")
+    }
+}