added debug to lox_std

interpreter/src/lox_std.rs

@@ -6,6 +6,7 @@ use crate::error::RuntimeError;
 
 pub fn init_std(env: &mut Runtime) {
     clock().register(env);
+    debug().register(env);
     exit().register(env);
     input().register(env);
     print_env().register(env);
@@ -26,6 +27,18 @@ fn clock() -> LoxExternFunction {
     LoxExternFunction::new("clock", 0, closure)
 }
 
+fn debug() -> LoxExternFunction {
+    let closure: ExternFunClosure = |args, _env| {
+        for arg in args {
+            println!("{arg:?}");
+        }
+
+        Ok(Value::Nil)
+    };
+
+    LoxExternFunction::new("debug", 1, closure)
+}
+
 fn exit() -> LoxExternFunction {
     let closure: ExternFunClosure = |args, _env| {
         assert_eq!(args.len(), 1);