From c3cf09c517dcfd4adb418ff84c189dc3910f089c Mon Sep 17 00:00:00 2001
From: Sebastian Hugentobler <shu@vanwa.ch>
Date: Wed, 28 May 2025 22:05:30 +0200
Subject: [PATCH] try some macro magic

---
 src/native_functions.rs | 41 +++++++++++++++++------------------------
 1 file changed, 17 insertions(+), 24 deletions(-)

diff --git a/src/native_functions.rs b/src/native_functions.rs
index 5639664..3ce4d2a 100644
--- a/src/native_functions.rs
+++ b/src/native_functions.rs
@@ -263,32 +263,25 @@ impl Callable for CliArgs {
     }
 }
 
+/// Helper macro to create a (String, Value) tuple for a native function.
+macro_rules! native_fn {
+    ($callable:expr) => {{
+        let callable_rc: Rc<dyn Callable> = Rc::new($callable);
+        (
+            callable_rc.name(),
+            Value::Callable((callable_rc.clone(), CallableType::Function)),
+        )
+    }};
+}
+
 /// Return all native functions available to the Lox interpreter
 pub fn all(cli_args: Vec<String>) -> Vec<(String, Value)> {
     vec![
-        (
-            "asciiOut".into(),
-            Value::Callable((Rc::new(AsciiOut {}), CallableType::Function)),
-        ),
-        (
-            "clock".into(),
-            Value::Callable((Rc::new(Clock {}), CallableType::Function)),
-        ),
-        (
-            "out".into(),
-            Value::Callable((Rc::new(Out {}), CallableType::Function)),
-        ),
-        (
-            "read".into(),
-            Value::Callable((Rc::new(ReadFile {}), CallableType::Function)),
-        ),
-        (
-            "promptAscii".into(),
-            Value::Callable((Rc::new(PromptAscii {}), CallableType::Function)),
-        ),
-        (
-            "args".into(),
-            Value::Callable((Rc::new(CliArgs { cli_args }), CallableType::Function)),
-        ),
+        native_fn!(AsciiOut {}),
+        native_fn!(Clock {}),
+        native_fn!(Out {}),
+        native_fn!(ReadFile {}),
+        native_fn!(PromptAscii {}),
+        native_fn!(CliArgs { cli_args }),
     ]
 }