diff --git a/src/rstd.rs b/src/rstd.rs
index 1d706d4..f6f04c6 100644
--- a/src/rstd.rs
+++ b/src/rstd.rs
@@ -3,6 +3,7 @@
 pub mod atomic;
 pub mod cast;
 pub mod collections;
+mod external_points;
 pub mod inject;
 pub mod inlining;
 mod local_origin;
diff --git a/src/rstd/collections/stack.rs b/src/rstd/collections/stack.rs
index 83c0d02..b8a62be 100644
--- a/src/rstd/collections/stack.rs
+++ b/src/rstd/collections/stack.rs
@@ -2,6 +2,7 @@
 
 use crate::func::{context::*, controlflow::ControlFlow};
 use crate::rcore::*;
+use crate::rstd::external_points::*;
 use crate::rstd::{inlining::*, nullable::*, point::*, *};
 
 /// Node containing a (nullable) reference to the next node and an element.
@@ -35,10 +36,6 @@ impl<'a, Ctx: Context<'a>, A: StackCompatible<'a, Ctx>> Serializable for StackNo
     }
 }
 
-pub trait ExternalPoints<'a, Ctx: Context<'a>, T: MentionableBase<'a, Ctx>> {
-    fn ex_points_typed(mentionable: &T, points: &mut impl PointsVisitor<'a, Ctx>);
-}
-
 pub trait StackCompatible<'a, Ctx: Context<'a>>:
     Mentionable<'a, Ctx> + ExternalPoints<'a, Ctx, Stack<'a, Ctx, Self>>
 {
@@ -52,21 +49,17 @@ impl<
 {
 }
 
-pub trait ExternalPointsProxy<'a, Ctx: Context<'a>, T>: FactoryProxy<'a, Ctx>
-where
-    Self::F: Factory<'a, Ctx>,
-{
-    fn exp_points_typed(stack: &T, points: &mut impl PointsVisitor<'a, Ctx>);
-}
-
 impl<'a, Ctx: Context<'a>, A: Mentionable<'a, Ctx>> ExternalPoints<'a, Ctx, Stack<'a, Ctx, Self>>
     for A
 where
     <Fctr<'a, Ctx, A> as WithParseMode>::WithMode:
         ExternalPointsProxy<'a, Ctx, Stack<'a, Ctx, A>, F = Fctr<'a, Ctx, A>>,
 {
-    fn ex_points_typed(stack: &Stack<'a, Ctx, Self>, points: &mut impl PointsVisitor<'a, Ctx>) {
-        <<Fctr<'a, Ctx, A> as WithParseMode>::WithMode as ExternalPointsProxy<'a, Ctx, _>>::exp_points_typed(stack, points)
+    fn ex_points_typed(
+        mentionable: &Stack<'a, Ctx, Self>,
+        points: &mut impl PointsVisitor<'a, Ctx>,
+    ) {
+        <<Fctr<'a, Ctx, A> as WithParseMode>::WithMode as ExternalPointsProxy<'a, Ctx, _>>::exp_points_typed(mentionable, points)
     }
 }
 
@@ -76,10 +69,10 @@ where
     F::Mtbl: MentionableTop<'a, Ctx>,
 {
     fn exp_points_typed(
-        stack: &Stack<'a, Ctx, Mtbl<'a, Ctx, Self::F>>,
+        mentionable: &Stack<'a, Ctx, Mtbl<'a, Ctx, Self::F>>,
         points: &mut impl PointsVisitor<'a, Ctx>,
     ) {
-        stack.points_typed(points)
+        mentionable.points_typed(points)
     }
 }
 
@@ -89,10 +82,10 @@ where
     F::Mtbl: MentionableTop<'a, Ctx>,
 {
     fn exp_points_typed(
-        stack: &Stack<'a, Ctx, Mtbl<'a, Ctx, Self::F>>,
+        mentionable: &Stack<'a, Ctx, Mtbl<'a, Ctx, Self::F>>,
         points: &mut impl PointsVisitor<'a, Ctx>,
     ) {
-        stack.points_typed(points)
+        mentionable.points_typed(points)
     }
 }
 
diff --git a/src/rstd/external_points.rs b/src/rstd/external_points.rs
new file mode 100644
index 0000000..23384d9
--- /dev/null
+++ b/src/rstd/external_points.rs
@@ -0,0 +1,12 @@
+use crate::rcore::*;
+
+pub trait ExternalPoints<'a, Ctx: Context<'a>, T: MentionableBase<'a, Ctx>> {
+    fn ex_points_typed(mentionable: &T, points: &mut impl PointsVisitor<'a, Ctx>);
+}
+
+pub trait ExternalPointsProxy<'a, Ctx: Context<'a>, T>: FactoryProxy<'a, Ctx>
+where
+    Self::F: Factory<'a, Ctx>,
+{
+    fn exp_points_typed(mentionable: &T, points: &mut impl PointsVisitor<'a, Ctx>);
+}