jinja : implement sameas test

@@ -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;

@@ -1206,12 +1206,36 @@ 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}},