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-rw-r--r--tvix/eval/src/value/function.rs15
-rw-r--r--tvix/eval/src/value/thunk.rs17
2 files changed, 20 insertions, 12 deletions
diff --git a/tvix/eval/src/value/function.rs b/tvix/eval/src/value/function.rs
index 4f5cc1154bd7..758994504e45 100644
--- a/tvix/eval/src/value/function.rs
+++ b/tvix/eval/src/value/function.rs
@@ -4,7 +4,10 @@ use std::{
     rc::Rc,
 };
 
-use crate::{chunk::Chunk, upvalues::UpvalueCarrier, Value};
+use crate::{
+    chunk::Chunk,
+    upvalues::{UpvalueCarrier, Upvalues},
+};
 
 #[derive(Clone, Debug)]
 pub struct Lambda {
@@ -30,7 +33,7 @@ impl Lambda {
 #[derive(Clone, Debug)]
 pub struct InnerClosure {
     pub lambda: Rc<Lambda>,
-    pub upvalues: Vec<Value>,
+    upvalues: Upvalues,
 }
 
 #[repr(transparent)]
@@ -40,7 +43,7 @@ pub struct Closure(Rc<RefCell<InnerClosure>>);
 impl Closure {
     pub fn new(lambda: Rc<Lambda>) -> Self {
         Closure(Rc::new(RefCell::new(InnerClosure {
-            upvalues: Vec::with_capacity(lambda.upvalue_count),
+            upvalues: Upvalues::with_capacity(lambda.upvalue_count),
             lambda,
         })))
     }
@@ -59,11 +62,11 @@ impl UpvalueCarrier for Closure {
         self.0.borrow().lambda.upvalue_count
     }
 
-    fn upvalues(&self) -> Ref<'_, [Value]> {
-        Ref::map(self.0.borrow(), |c| c.upvalues.as_slice())
+    fn upvalues(&self) -> Ref<'_, Upvalues> {
+        Ref::map(self.0.borrow(), |c| &c.upvalues)
     }
 
-    fn upvalues_mut(&self) -> RefMut<'_, Vec<Value>> {
+    fn upvalues_mut(&self) -> RefMut<'_, Upvalues> {
         RefMut::map(self.0.borrow_mut(), |c| &mut c.upvalues)
     }
 }
diff --git a/tvix/eval/src/value/thunk.rs b/tvix/eval/src/value/thunk.rs
index ad56b5eaf646..5098be186fa8 100644
--- a/tvix/eval/src/value/thunk.rs
+++ b/tvix/eval/src/value/thunk.rs
@@ -24,7 +24,12 @@ use std::{
     rc::Rc,
 };
 
-use crate::{errors::ErrorKind, upvalues::UpvalueCarrier, vm::VM, Value};
+use crate::{
+    errors::ErrorKind,
+    upvalues::{UpvalueCarrier, Upvalues},
+    vm::VM,
+    Value,
+};
 
 use super::Lambda;
 
@@ -35,7 +40,7 @@ enum ThunkRepr {
     /// execution.
     Suspended {
         lambda: Rc<Lambda>,
-        upvalues: Vec<Value>,
+        upvalues: Upvalues,
     },
 
     /// Thunk currently under-evaluation; encountering a blackhole
@@ -52,7 +57,7 @@ pub struct Thunk(Rc<RefCell<ThunkRepr>>);
 impl Thunk {
     pub fn new(lambda: Rc<Lambda>) -> Self {
         Thunk(Rc::new(RefCell::new(ThunkRepr::Suspended {
-            upvalues: Vec::with_capacity(lambda.upvalue_count),
+            upvalues: Upvalues::with_capacity(lambda.upvalue_count),
             lambda: lambda.clone(),
         })))
     }
@@ -119,14 +124,14 @@ impl UpvalueCarrier for Thunk {
         panic!("upvalues() on non-suspended thunk");
     }
 
-    fn upvalues(&self) -> Ref<'_, [Value]> {
+    fn upvalues(&self) -> Ref<'_, Upvalues> {
         Ref::map(self.0.borrow(), |thunk| match thunk {
-            ThunkRepr::Suspended { upvalues, .. } => upvalues.as_slice(),
+            ThunkRepr::Suspended { upvalues, .. } => upvalues,
             _ => panic!("upvalues() on non-suspended thunk"),
         })
     }
 
-    fn upvalues_mut(&self) -> RefMut<'_, Vec<Value>> {
+    fn upvalues_mut(&self) -> RefMut<'_, Upvalues> {
         RefMut::map(self.0.borrow_mut(), |thunk| match thunk {
             ThunkRepr::Suspended { upvalues, .. } => upvalues,
             _ => panic!("upvalues() on non-suspended thunk"),