feat: SCC analysis (thunk capture WIP)

src/ty/internal/attrset.rs

@@ -14,7 +14,7 @@ use super::super::public as p;
 use super::Value;
 
 #[repr(transparent)]
-#[derive(Constructor, Clone, PartialEq)]
+#[derive(Constructor, Clone, PartialEq, Debug)]
 pub struct AttrSet {
     data: HashMap<EcoString, Value>,
 }
@@ -61,7 +61,7 @@ impl AttrSet {
             let item = item?;
             let Some(Value::AttrSet(attrs)) = data.get(&item) else {
                 return Err(Error::EvalError(format!(
-                    "{} not found",
+                    "attribute {} not found",
                     Symbol::from(item)
                 )));
             };
@@ -73,7 +73,10 @@ impl AttrSet {
             .ok_or_else(|| Error::EvalError(format!("{} not found", Symbol::from(last))))
     }
 
-    pub fn has_attr(&self, mut path: impl DoubleEndedIterator<Item = Result<EcoString>>) -> Result<bool> {
+    pub fn has_attr(
+        &self,
+        mut path: impl DoubleEndedIterator<Item = Result<EcoString>>,
+    ) -> Result<bool> {
         let mut data = &self.data;
         let last = path.nth_back(0).unwrap();
         for item in path {