Impl subtraction for TimeType

1 files changed, 9 insertions, 0 deletions

diff --git a/src/timetype.rs b/src/timetype.rs
index 567ff8a..4e2575e 100644
--- a/src/timetype.rs
+++ b/src/timetype.rs
@@ -4,6 +4,7 @@
 use chrono::NaiveDateTime;
 
 use std::ops::Add;
+use std::ops::Sub;
 
 /// A Type of Time, currently based on chrono::NaiveDateTime
 #[derive(Debug)]
@@ -30,6 +31,14 @@ impl Add for TimeType {
     }
 }
 
+impl Sub for TimeType {
+    type Output = TimeType;
+
+    fn sub(self, rhs: TimeType) -> Self::Output {
+        TimeType::Subtraction(Box::new(self), Box::new(rhs))
+    }
+}
+
 
 #[cfg(test)]
 mod tests {