1 files changed, 43 insertions, 0 deletions
diff --git a/matrix-lang/src/value/function.rs b/matrix-lang/src/value/function.rs
new file mode 100644
index 0000000..38d8b0b
--- /dev/null
+++ b/matrix-lang/src/value/function.rs
@@ -0,0 +1,43 @@
+use crate::prelude::*;
+use std::fmt::{Debug, Display};
+
+pub struct Function {
+    pub name: Rc<str>,
+    pub arity: usize,
+    pub variadic: bool,
+    pub fun: InnerFunction
+}
+
+#[derive(Clone)]
+pub enum InnerFunction {
+    Compiled(Rc<Chunk>),
+    Native(Rc<dyn Fn((&mut Vm, &mut StackFrame), Vec<Value>) -> Result<Value>>),
+}
+
+impl Debug for Function {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        use InnerFunction as F;
+        match self.fun {
+            F::Compiled(_) => {
+                write!(f, "[Function {}]", self.name)
+            },
+            F::Native(_) => {
+                write!(f, "[Builtin {}]", self.name)
+            }
+        }
+    }
+}
+
+impl Display for Function {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        use InnerFunction as F;
+        match self.fun {
+            F::Compiled(_) => {
+                write!(f, "[Function {}]", self.name)
+            },
+            F::Native(_) => {
+                write!(f, "[Builtin {}]", self.name)
+            }
+        }
+    }
+}