1 files changed, 12 insertions, 0 deletions
diff --git a/include/mbgl/style/function.hpp b/include/mbgl/style/function.hpp
index 44ffa31079..97e880b280 100644
--- a/include/mbgl/style/function.hpp
+++ b/include/mbgl/style/function.hpp
@@ -21,7 +21,19 @@ public:
 private:
     float base = 1;
     std::vector<std::pair<float, T>> stops;
+
+    template <class S> friend bool operator==(const Function<S>&, const Function<S>&);
 };
 
+template <class T>
+bool operator==(const Function<T>& lhs, const Function<T>& rhs) {
+    return lhs.base == rhs.base && lhs.stops == rhs.stops;
+}
+
+template <class T>
+bool operator!=(const Function<T>& lhs, const Function<T>& rhs) {
+    return !(lhs == rhs);
+}
+
 } // namespace style
 } // namespace mbgl