refactor(resolver): change Rule to a closed enum

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

1 files changed, 7 insertions, 4 deletions

diff --git a/crates/shirabe/src/dependency_resolver/rule_set_iterator.rs b/crates/shirabe/src/dependency_resolver/rule_set_iterator.rs
index 73c406f..c1b8657 100644
--- a/crates/shirabe/src/dependency_resolver/rule_set_iterator.rs
+++ b/crates/shirabe/src/dependency_resolver/rule_set_iterator.rs
@@ -1,12 +1,15 @@
 //! ref: composer/src/Composer/DependencyResolver/RuleSetIterator.php
 
+use std::cell::RefCell;
+use std::rc::Rc;
+
 use crate::dependency_resolver::Rule;
 use indexmap::IndexMap;
 
 /// Implements PHP \Iterator over a grouped rule set.
 #[derive(Debug)]
 pub struct RuleSetIterator {
-    pub(crate) rules: IndexMap<i64, Vec<Box<dyn Rule>>>,
+    pub(crate) rules: IndexMap<i64, Vec<Rc<RefCell<Rule>>>>,
     pub(crate) types: Vec<i64>,
     pub(crate) current_offset: i64,
     pub(crate) current_type: i64,
@@ -14,7 +17,7 @@ pub struct RuleSetIterator {
 }
 
 impl RuleSetIterator {
-    pub fn new(rules: IndexMap<i64, Vec<Box<dyn Rule>>>) -> Self {
+    pub fn new(rules: IndexMap<i64, Vec<Rc<RefCell<Rule>>>>) -> Self {
         let mut types: Vec<i64> = rules.keys().copied().collect();
         types.sort();
         let mut iter = Self {
@@ -28,8 +31,8 @@ impl RuleSetIterator {
         iter
     }
 
-    pub fn current(&self) -> &dyn Rule {
-        &*self.rules[&self.current_type][self.current_offset as usize]
+    pub fn current(&self) -> Rc<RefCell<Rule>> {
+        self.rules[&self.current_type][self.current_offset as usize].clone()
     }
 
     pub fn key(&self) -> i64 {