1 files changed, 4 insertions, 0 deletions
diff --git a/src/type/util.rs b/src/type/util.rs
index 04b4ee6..0ea1e4d 100644
--- a/src/type/util.rs
+++ b/src/type/util.rs
@@ -6,6 +6,10 @@ pub fn arr(a: impl Into<Box<Type>>, b: impl Into<Box<Type>>) -> Type {
     Arrow(a.into(), b.into())
 }
 
+pub fn sumtype(a: impl Into<Box<Type>>, b: impl Into<Box<Type>>) -> Type {
+    SumType(a.into(), b.into())
+}
+
 pub fn vt(name: &str) -> Type {
     VarType(name.to_string())
 }