From 81bc6b83f827df746eb129235488d325c49cae52 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sigbj=C3=B8rn=20Skj=C3=A6ret?=
 <sigbjorn.skjaeret@huggingface.co>
Date: Sat, 26 Sep 2026 10:14:58 +0200
Subject: [PATCH] jinja : implement sameas test (#29448)

* implement sameas test

* add tests
---
 common/jinja/value.cpp | 24 ++++++++++++++++++++++--
 tests/test-jinja.cpp   | 26 +++++++++++++++++++++++++-
 2 files changed, 47 insertions(+), 3 deletions(-)

diff --git a/common/jinja/value.cpp b/common/jinja/value.cpp
index 6999ef7d67..ce4c66f879 100644
--- a/common/jinja/value.cpp
+++ b/common/jinja/value.cpp
@@ -515,8 +515,28 @@ const func_builtins & global_builtins() {
         }},
         {"test_is_sameas", [](const func_args & args) -> value {
             // Check if an object points to the same memory address as another object
-            (void)args;
-            throw not_implemented_exception("sameas test not implemented");
+            args.ensure_count(2);
+            auto a = args.get_pos(0);
+            auto b = args.get_pos(1);
+            bool res = false;
+            if (!is_val<value_undefined>(a) && !is_val<value_undefined>(b)) {
+                if (is_val<value_none>(a) && is_val<value_none>(b)) {
+                    res = true;
+                } else if (is_val<value_bool>(a) && is_val<value_bool>(b)) {
+                    if (a->as_bool() == b->as_bool()) {
+                        res = true;
+                    }
+                } else if (is_val<value_int>(a) && is_val<value_int>(b)) {
+                    const int64_t x = a->as_int();
+                    // Allow comparison within small-int cache range
+                    if (x >= -5 && x <= 256 && x == b->as_int()) {
+                        res = true;
+                    }
+                } else if (a == b) {
+                    res = true;
+                }
+            }
+            return mk_val<value_bool>(res);
         }},
         {"test_is_escaped", [](const func_args & args) -> value {
             (void)args;
diff --git a/tests/test-jinja.cpp b/tests/test-jinja.cpp
index 064f5927ba..50a79af3f3 100644
--- a/tests/test-jinja.cpp
+++ b/tests/test-jinja.cpp
@@ -1212,12 +1212,36 @@ static void test_tests(testing & t) {
         "yes"
     );
 
-    test_template(t, "is sameas",
+    test_template(t, "is sameas boolean",
         "{{ 'yes' if x is sameas(false) }}",
         {{"x", false}},
         "yes"
     );
 
+    test_template(t, "is sameas integer",
+        "{{ 'yes' if x is sameas(1) }}",
+        {{"x", 1}},
+        "yes"
+    );
+
+    test_template(t, "is sameas object",
+        "{{ 'yes' if x is sameas(x) }}",
+        {{"x", {{"y", false}}}},
+        "yes"
+    );
+
+    test_template(t, "is sameas ref object",
+        "{% set y = x.y %}{{ 'yes' if x.y is sameas(y) and x.y is not sameas(x.z) }}",
+        {{"x", {{"y", {{"z", 1}}}, {"z", {{"z", 1}}}}}},
+        "yes"
+    );
+
+    test_template(t, "is sameas undefined",
+        "{{ 'yes' if x is sameas(x) else 'no' }}",
+        json::object(),
+        "no"
+    );
+
     test_template(t, "is boolean",
         "{{ 'yes' if x is boolean }}",
         {{"x", true}},