From ec64d7309ccb7e63c9fdf00efe3778f3313f0178 Mon Sep 17 00:00:00 2001
From: sergeych <real.sergeych@gmail.com>
Date: Wed, 4 Feb 2026 00:01:29 +0300
Subject: [PATCH] Add typed Iterable/Iterator externs

---
 lynglib/stdlib/lyng/root.lyng | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/lynglib/stdlib/lyng/root.lyng b/lynglib/stdlib/lyng/root.lyng
index 0fd0f03..814f63f 100644
--- a/lynglib/stdlib/lyng/root.lyng
+++ b/lynglib/stdlib/lyng/root.lyng
@@ -8,6 +8,18 @@ extern class IllegalArgumentException
 extern class NotImplementedException
 extern class Delegate
 
+extern class Iterable<T> {
+    fun iterator(): Iterator<T>
+    fun toList(): List<T>
+}
+
+extern class Iterator<T> {
+    fun hasNext(): Bool
+    fun next(): T
+    fun cancelIteration(): Void
+    fun toList(): List<T>
+}
+
 // Built-in math helpers (implemented in host runtime).
 extern fun abs(x: Object): Real
 extern fun ln(x: Object): Real