Add purity to LocalInfo and initialize in binder

The `LocalInfo` struct now includes a `purity` field to track the purity
of local variables and function arguments. This is initialized to
`Purity::Impure` for local variables and arguments within functions and
when registering native functions. Additionally, the `Environment`
struct is updated to include `root_scopes` and `root_slot_count` to
support parallel mode compilation by populating the root scope with
initial function and native function information.

src/ast/compiler/binder.rs

@@ -3,7 +3,7 @@ use crate::ast::compiler::bound_nodes::{
 };
 use crate::ast::diagnostics::Diagnostics;
 use crate::ast::nodes::{Node, Symbol, UntypedKind};
-use crate::ast::types::{Identity, StaticType};
+use crate::ast::types::{Identity, StaticType, Purity};
 use std::cell::RefCell;
 use std::collections::HashMap;
 use std::rc::Rc;
@@ -13,6 +13,7 @@ pub struct LocalInfo {
     pub addr: Address,
     pub identity: Identity,
     pub _ty: StaticType,
+    pub purity: Purity,
 }
 
 #[derive(Debug, Clone)]
@@ -69,6 +70,7 @@ impl FunctionCompiler {
                 addr: Address::Local(slot),
                 identity,
                 _ty: StaticType::Any,
+                purity: Purity::Impure,
             },
         );
         self.slot_count += 1;
@@ -191,6 +193,7 @@ impl Binder {
                         addr,
                         identity,
                         _ty: StaticType::Any,
+                        purity: Purity::Impure,
                     },
                 );
                 return Some(addr);

src/ast/environment.rs

@@ -76,6 +76,8 @@ pub struct Environment {
     pub global_purity: Rc<RefCell<HashMap<GlobalIdx, Purity>>>,
     pub global_values: Rc<RefCell<Vec<Value>>>,
     pub fixed_scope_idx: i32,
+    pub root_scopes: Rc<RefCell<Vec<crate::ast::compiler::binder::CompilerScope>>>,
+    pub root_slot_count: Rc<RefCell<u32>>,
     pub function_registry: Rc<RefCell<GlobalFunctionRegistry>>,
     pub typed_function_registry: Rc<RefCell<GlobalAnalyzedRegistry>>,
     pub monomorph_cache: Rc<RefCell<MonoCache>>,
@@ -164,6 +166,8 @@ impl Environment {
             global_purity: Rc::new(RefCell::new(HashMap::new())),
             global_values: Rc::new(RefCell::new(Vec::new())),
             fixed_scope_idx: -1,
+            root_scopes: Rc::new(RefCell::new(vec![crate::ast::compiler::binder::CompilerScope::new()])),
+            root_slot_count: Rc::new(RefCell::new(0)),
             function_registry: Rc::new(RefCell::new(HashMap::new())),
             typed_function_registry: Rc::new(RefCell::new(HashMap::new())),
             monomorph_cache: Rc::new(RefCell::new(HashMap::new())),
@@ -504,10 +508,25 @@ impl Environment {
 
         let idx = GlobalIdx(values.len() as u32);
         let identity = NodeIdentity::new(SourceLocation { line: 0, col: 0 });
-        names.insert(Symbol::from(name), (idx, identity));
-        types.insert(idx, ty);
+        names.insert(Symbol::from(name), (idx, identity.clone()));
+        types.insert(idx, ty.clone());
         purity.insert(idx, func.purity);
-        values.push(Value::Function(func));
+        values.push(Value::Function(func.clone()));
+
+        // Parallel mode: populate root_scopes[0]
+        let mut root_scopes = self.root_scopes.borrow_mut();
+        let mut slot_count = self.root_slot_count.borrow_mut();
+        let slot = crate::ast::compiler::bound_nodes::LocalSlot(*slot_count);
+        root_scopes[0].locals.insert(
+            Symbol::from(name),
+            crate::ast::compiler::binder::LocalInfo {
+                addr: Address::Local(slot),
+                identity,
+                _ty: ty,
+                purity: func.purity,
+            },
+        );
+        *slot_count += 1;
     }
 
     pub fn register_native_fn(
@@ -535,10 +554,25 @@ impl Environment {
 
         let idx = GlobalIdx(values.len() as u32);
         let identity = NodeIdentity::new(SourceLocation { line: 0, col: 0 });
-        names.insert(Symbol::from(name), (idx, identity));
-        types.insert(idx, ty);
+        names.insert(Symbol::from(name), (idx, identity.clone()));
+        types.insert(idx, ty.clone());
         purity.insert(idx, Purity::Pure);
         values.push(val);
+
+        // Parallel mode: populate root_scopes[0]
+        let mut root_scopes = self.root_scopes.borrow_mut();
+        let mut slot_count = self.root_slot_count.borrow_mut();
+        let slot = crate::ast::compiler::bound_nodes::LocalSlot(*slot_count);
+        root_scopes[0].locals.insert(
+            Symbol::from(name),
+            crate::ast::compiler::binder::LocalInfo {
+                addr: Address::Local(slot),
+                identity,
+                _ty: ty,
+                purity: Purity::Pure,
+            },
+        );
+        *slot_count += 1;
     }