2 files changed, 22 insertions, 1 deletions
diff --git a/src/lua/mod.rs b/src/lua/mod.rs
index 0ddcd7f..7388890 100644
--- a/src/lua/mod.rs
+++ b/src/lua/mod.rs
@@ -1,4 +1,5 @@
 use std::{
+    borrow::Borrow,
     path::Path,
     sync::{Mutex, MutexGuard},
 };
@@ -6,9 +7,10 @@ use std::{
 use lazy_static::lazy_static;
 use mlua::prelude::*;
 
-use crate::sheet::cell::CellRef;
+use crate::{config::GlobalConfig, sheet::cell::CellRef};
 
 pub mod iobuffer;
+pub mod ownedfunction;
 pub mod runtime;
 
 lazy_static! {
@@ -37,6 +39,8 @@ fn print(_: &Lua, args: LuaMultiValue) -> LuaResult<()> {
         if let Some(ud) = arg.as_userdata() {
             if ud.is::<CellRef>() {
                 writer.write(ud.borrow::<CellRef>().unwrap().value().to_string());
+            } else if ud.is::<GlobalConfig>() {
+                writer.write(format!("{:#?}", GlobalConfig::instance().borrow()))
             } else {
                 writer.write(format!("{:#?}", ud));
             }
diff --git a/src/lua/ownedfunction.rs b/src/lua/ownedfunction.rs
new file mode 100644
index 0000000..a8d81cf
--- /dev/null
+++ b/src/lua/ownedfunction.rs
@@ -0,0 +1,17 @@
+use mlua::{Function, Lua, RegistryKey, Value};
+
+#[derive(Debug)]
+pub struct OwnedFunction {
+    key: RegistryKey,
+}
+
+impl OwnedFunction {
+    pub fn new<'lua>(value: Value<'lua>, lua: &'lua Lua) -> Self {
+        let key = lua.create_registry_value(value).unwrap();
+        Self { key }
+    }
+
+    pub fn get<'lua>(&self, lua: &'lua Lua) -> Function<'lua> {
+        lua.registry_value(&self.key).unwrap()
+    }
+}