1 files changed, 24 insertions, 1 deletions

diff --git a/src/lib.rs b/src/lib.rs
index fca5dd5..39f4605 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,6 +1,29 @@
 mod ast;
 mod eval;
-mod parser;
+pub mod parser;
 mod string;
 
 pub use eval::evaluate;
+
+trait Wrap<T> {
+    fn wrap<F, U>(self, f: F) -> U
+    where
+        F: Fn(T) -> U,
+        Self: Sized;
+
+    fn wrap_ok<E>(self) -> Result<Self, E>
+    where
+        Self: Sized,
+    {
+        Ok(self)
+    }
+}
+
+impl<T> Wrap<T> for T {
+    fn wrap<F, U>(self, f: F) -> U
+    where
+        F: Fn(T) -> U,
+    {
+        f(self)
+    }
+}