Add ops

5 files changed, 69 insertions, 0 deletions

diff --git a/src/lib.rs b/src/lib.rs
index 34d102d..8371ad1 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1 +1,2 @@
 pub mod filter;
+pub mod ops;
diff --git a/src/ops/and.rs b/src/ops/and.rs
new file mode 100644
index 0000000..8d79b42
--- /dev/null
+++ b/src/ops/and.rs
@@ -0,0 +1,22 @@
+use filter::Filter;
+
+pub struct And<T> {
+    a: Box<Filter<T>>,
+    b: Box<Filter<T>>
+}
+
+impl<T> And<T> {
+
+    pub fn new(a: Box<Filter<T>>, b: Box<Filter<T>>) -> And<T> {
+        And { a: a, b: b }
+    }
+
+}
+
+impl<T> Filter<T> for And<T> {
+
+    fn filter(&self, e: &T) -> bool {
+        self.a.filter(e) && self.b.filter(e)
+    }
+
+}
diff --git a/src/ops/mod.rs b/src/ops/mod.rs
new file mode 100644
index 0000000..668eedc
--- /dev/null
+++ b/src/ops/mod.rs
@@ -0,0 +1,3 @@
+pub mod and;
+pub mod not;
+pub mod or;
diff --git a/src/ops/not.rs b/src/ops/not.rs
new file mode 100644
index 0000000..a7c5c76
--- /dev/null
+++ b/src/ops/not.rs
@@ -0,0 +1,21 @@
+use filter::Filter;
+
+pub struct Not<T> {
+    a: Box<Filter<T>>
+}
+
+impl<T> Not<T> {
+
+    pub fn new(a: Box<Filter<T>>) -> Not<T> {
+        Not { a: a }
+    }
+
+}
+
+impl<T> Filter<T> for Not<T> {
+
+    fn filter(&self, e: &T) -> bool {
+        !self.a.filter(e)
+    }
+
+}
diff --git a/src/ops/or.rs b/src/ops/or.rs
new file mode 100644
index 0000000..b001d75
--- /dev/null
+++ b/src/ops/or.rs
@@ -0,0 +1,22 @@
+use filter::Filter;
+
+pub struct Or<T> {
+    a: Box<Filter<T>>,
+    b: Box<Filter<T>>
+}
+
+impl<T> Or<T> {
+
+    pub fn new(a: Box<Filter<T>>, b: Box<Filter<T>>) -> Or<T> {
+        Or { a: a, b: b }
+    }
+
+}
+
+impl<T> Filter<T> for Or<T> {
+
+    fn filter(&self, e: &T) -> bool {
+        self.a.filter(e) || self.b.filter(e)
+    }
+
+}