Change debugger init signature.

src/api/events.rs

@@ -349,7 +349,9 @@ impl Engine {
     #[inline(always)]
     pub fn register_debugger(
         &mut self,
-        init: impl Fn(&Self) -> Dynamic + SendSync + 'static,
+        init: impl Fn(&Self, crate::debugger::Debugger) -> crate::debugger::Debugger
+            + SendSync
+            + 'static,
         callback: impl Fn(
                 EvalContext,
                 crate::eval::DebuggerEvent,

src/bin/rhai-dbg.rs

@@ -604,7 +604,10 @@ fn main() {
     #[allow(deprecated)]
     engine.register_debugger(
         // Store the current source in the debugger state
-        |_| "".into(),
+        |engine, mut debugger| {
+            debugger.set_state(engine.const_empty_string());
+            debugger
+        },
         // Main debugging interface
         move |context, event, node, source, pos| {
             debug_callback(context, event, node, source, pos, &lines)

src/eval/debugger.rs

@@ -10,10 +10,10 @@ use std::{fmt, iter::repeat, mem};
 
 /// Callback function to initialize the debugger.
 #[cfg(not(feature = "sync"))]
-pub type OnDebuggingInit = dyn Fn(&Engine) -> Dynamic;
+pub type OnDebuggingInit = dyn Fn(&Engine, Debugger) -> Debugger;
 /// Callback function to initialize the debugger.
 #[cfg(feature = "sync")]
-pub type OnDebuggingInit = dyn Fn(&Engine) -> Dynamic + Send + Sync;
+pub type OnDebuggingInit = dyn Fn(&Engine, Debugger) -> Debugger + Send + Sync;
 
 /// Callback function for debugging.
 #[cfg(not(feature = "sync"))]
@@ -268,12 +268,12 @@ impl Debugger {
     /// Create a new [`Debugger`].
     #[inline(always)]
     #[must_use]
-    pub const fn new(status: DebuggerStatus, state: Dynamic) -> Self {
+    pub const fn new(status: DebuggerStatus) -> Self {
         Self {
             status,
             break_points: Vec::new(),
             call_stack: Vec::new(),
-            state,
+            state: Dynamic::UNIT,
         }
     }
     /// Get the current call stack.

src/eval/global_state.rs

@@ -104,7 +104,8 @@ impl GlobalRuntimeState {
 
             #[cfg(feature = "debugging")]
             debugger: engine.debugger.as_ref().map(|x| {
-                crate::eval::Debugger::new(crate::eval::DebuggerStatus::Init, (x.0)(engine))
+                let dbg = crate::eval::Debugger::new(crate::eval::DebuggerStatus::Init);
+                (x.0)(engine, dbg)
             }),
         }
     }