From 49b652024ed10d4d16c9222b334784de3c858bc3 Mon Sep 17 00:00:00 2001
From: Ilnur Khuziev <ilnur.khuziev@yandex.ru>
Date: Fri, 5 Sep 2025 12:21:36 +0300
Subject: [PATCH] fix interpreting optional with 0 value as true in checks

---
 src/filters.cpp | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/filters.cpp b/src/filters.cpp
index 3ab9f338..203b23a4 100644
--- a/src/filters.cpp
+++ b/src/filters.cpp
@@ -487,7 +487,7 @@ InternalValue SequenceAccessor::Filter(const InternalValue& baseVal, RenderConte
     switch (m_mode)
     {
         case FirstItemMode:
-            if (listSize)
+            if (listSize && *listSize > 0)
                 result = ProtectedValue( list.GetValueByIndex(0) );
             else
             {
@@ -497,7 +497,7 @@ InternalValue SequenceAccessor::Filter(const InternalValue& baseVal, RenderConte
             }
             break;
         case LastItemMode:
-            if (listSize)
+            if (listSize && *listSize > 0)
                 result = ProtectedValue(list.GetValueByIndex(listSize.value() - 1));
             else
             {
@@ -508,7 +508,7 @@ InternalValue SequenceAccessor::Filter(const InternalValue& baseVal, RenderConte
             }
             break;
         case LengthMode:
-            if (listSize)
+            if (listSize && *listSize > 0)
                 result = static_cast<int64_t>(listSize.value());
             else
                 result = static_cast<int64_t>(std::distance(list.begin(), list.end()));
@@ -517,7 +517,7 @@ InternalValue SequenceAccessor::Filter(const InternalValue& baseVal, RenderConte
         {
             std::random_device rd;
             std::mt19937 gen(rd());
-            if (listSize)
+            if (listSize && *listSize > 0)
             {
                 std::uniform_int_distribution<> dis(0, static_cast<int>(listSize.value()) - 1);
                 result = ProtectedValue(list.GetValueByIndex(dis(gen)));