From 84b804adf79443cf2a8fa24b7b48bfa9fa312ff8 Mon Sep 17 00:00:00 2001
From: lisyarus <lisyarus@gmail.com>
Date: Sat, 25 Feb 2023 12:42:15 +0300
Subject: [PATCH] Add geom::gradient default constructor

---
 libs/geom/include/psemek/geom/gradient.hpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/libs/geom/include/psemek/geom/gradient.hpp b/libs/geom/include/psemek/geom/gradient.hpp
index e7b33b8a..028b9470 100644
--- a/libs/geom/include/psemek/geom/gradient.hpp
+++ b/libs/geom/include/psemek/geom/gradient.hpp
@@ -14,6 +14,8 @@ namespace psemek::geom
 	{
 		using result_type = R;
 
+		gradient() = default;
+
 		template <typename ... Args>
 		gradient(Args const & ...  args)
 		{
@@ -29,6 +31,8 @@ namespace psemek::geom
 
 		R operator()(T const & t) const
 		{
+			assert(!points_.empty());
+
 			auto it = std::upper_bound(points_.begin(), points_.end(), t, [](T const & t, auto const & p){ return t < p.first; });
 			if (it == points_.begin())
 				return points_.front().second;