1 files changed, 34 insertions, 0 deletions
diff --git a/src/util.rs b/src/util.rs
new file mode 100644
index 0000000..309a471
--- /dev/null
+++ b/src/util.rs
@@ -0,0 +1,34 @@
+macro_rules! enum_with_get_inner {
+    (
+       inner = $inner: ty;
+        $(#[$attr: meta])*
+        $visibility: vis enum $enum_name: ident {
+            $(
+                $(#[$variant_attr: meta])*
+                $variant: ident($variant_inner: ty),
+            )*
+        }
+    ) => {
+        $(#[$attr])*
+        $visibility enum $enum_name {
+            $(
+                $(#[$variant_attr])*
+                $variant($inner)
+            ),*
+        }
+
+        impl $enum_name {
+            /// Returns the inner value.
+            #[must_use]
+            pub fn inner(&self) -> &$inner {
+                match self {
+                    $(
+                        $enum_name::$variant(inner) => inner
+                    ),*
+                }
+            }
+        }
+    };
+}
+
+pub(crate) use enum_with_get_inner;