Use tag for debugger state.

src/bin/rhai-dbg.rs

@@ -60,12 +60,7 @@ fn print_current_source(
     lines: &[String],
     window: (usize, usize),
 ) {
-    let current_source = &mut *context
+    let current_source = &mut *context.tag_mut().write_lock::<ImmutableString>().unwrap();
-        .global_runtime_state_mut()
-        .debugger
-        .state_mut()
-        .write_lock::<ImmutableString>()
-        .unwrap();
     let src = source.unwrap_or("");
     if src != current_source {
         println!(

src/eval/debugger.rs

@@ -249,8 +249,6 @@ impl fmt::Display for CallStackFrame {
 pub struct Debugger {
     /// The current status command.
     pub(crate) status: DebuggerStatus,
-    /// The current state.
-    state: Dynamic,
     /// The current set of break-points.
     break_points: Vec<BreakPoint>,
     /// The current function call stack.
@@ -258,37 +256,16 @@ pub struct Debugger {
 }
 
 impl Debugger {
-    /// Create a new [`Debugger`] based on an [`Engine`].
+    /// Create a new [`Debugger`].
     #[inline(always)]
     #[must_use]
-    pub fn new(engine: &Engine) -> Self {
+    pub fn new(status: DebuggerStatus) -> Self {
         Self {
-            status: if engine.debugger.is_some() {
+            status,
-                DebuggerStatus::Init
-            } else {
-                DebuggerStatus::CONTINUE
-            },
-            state: if let Some((ref init, ..)) = engine.debugger {
-                init()
-            } else {
-                Dynamic::UNIT
-            },
             break_points: Vec::new(),
             call_stack: Vec::new(),
         }
     }
-    /// Get a reference to the current state.
-    #[inline(always)]
-    #[must_use]
-    pub fn state(&self) -> &Dynamic {
-        &self.state
-    }
-    /// Get a mutable reference to the current state.
-    #[inline(always)]
-    #[must_use]
-    pub fn state_mut(&mut self) -> &mut Dynamic {
-        &mut self.state
-    }
     /// Get the current call stack.
     #[inline(always)]
     #[must_use]

src/eval/global_state.rs

@@ -97,9 +97,23 @@ impl GlobalRuntimeState<'_> {
             #[cfg(not(feature = "no_module"))]
             #[cfg(not(feature = "no_function"))]
             constants: None,
+
+            #[cfg(not(feature = "debugging"))]
             tag: Dynamic::UNIT,
             #[cfg(feature = "debugging")]
-            debugger: crate::eval::Debugger::new(_engine),
+            tag: if let Some((ref init, ..)) = engine.debugger {
+                init()
+            } else {
+                Dynamic::UNIT
+            },
+
+            #[cfg(feature = "debugging")]
+            debugger: crate::eval::Debugger::new(if engine.debugger.is_some() {
+                crate::eval::DebuggerStatus::Init
+            } else {
+                crate::eval::DebuggerStatus::CONTINUE
+            }),
+
             dummy: PhantomData::default(),
         }
     }

tests/debugging.rs

@@ -56,17 +56,11 @@ fn test_debugger_state() -> Result<(), Box<EvalAltResult>> {
             Dynamic::from_map(state)
         },
         |mut context, _, _, _, _| {
-            // Get global runtime state
-            let global = context.global_runtime_state_mut();
-
-            // Get debugger
-            let debugger = &mut global.debugger;
-
             // Print debugger state - which is an object map
-            println!("Current state = {}", debugger.state());
+            println!("Current state = {}", context.tag());
 
             // Modify state
-            let mut state = debugger.state_mut().write_lock::<Map>().unwrap();
+            let mut state = context.tag_mut().write_lock::<Map>().unwrap();
             let hello = state.get("hello").unwrap().as_int().unwrap();
             state.insert("hello".into(), (hello + 1).into());
             state.insert("foo".into(), true.into());