From 45ca44d5f0387a0551cef87168a59d6df97f66fe Mon Sep 17 00:00:00 2001
From: "Claudius \"keldu\" Holeksa" <mail@keldu.de>
Date: Thu, 7 Aug 2025 13:14:16 +0200
Subject: Fixed iterator issue when testing addition

---
 modules/codec/c++/data.hpp   |  3 +--
 modules/codec/tests/math.cpp | 18 ++++++++++++++++++
 2 files changed, 19 insertions(+), 2 deletions(-)

diff --git a/modules/codec/c++/data.hpp b/modules/codec/c++/data.hpp
index 48b2e60..013b475 100644
--- a/modules/codec/c++/data.hpp
+++ b/modules/codec/c++/data.hpp
@@ -318,8 +318,7 @@ private:
 	
 public:
 	constexpr data() = default;
-	constexpr data(data<MetaSchema, encode::Native>){
-	}
+	constexpr data(data<MetaSchema, encode::Native>){}
 
 	constexpr data(const std::array<data<T, encode::Native>, ct_multiply<uint64_t,D...>::value>& value__):
 		value_{value__}
diff --git a/modules/codec/tests/math.cpp b/modules/codec/tests/math.cpp
index 4240df5..8b3b6f9 100644
--- a/modules/codec/tests/math.cpp
+++ b/modules/codec/tests/math.cpp
@@ -24,9 +24,27 @@ SAW_TEST("Math/Tensor"){
 	using namespace saw;
 
 	data<sch::Matrix<sch::Float64,2u,2u> > a;
+	{
+		a.at({{0u,0u}}) = 1.0;
+		a.at({{0u,1u}}) = 2.0;
+		a.at({{1u,0u}}) = 3.0;
+		a.at({{1u,1u}}) = 4.0;
+	}
 
 	data<sch::Matrix<sch::Float64,2u,2u> > b;
+	{
+		b.at({{0u,0u}}) = 2.0;
+		b.at({{0u,1u}}) = 3.0;
+		b.at({{1u,0u}}) = 4.0;
+		b.at({{1u,1u}}) = 5.0;
+	}
 
 	auto c = a + b;
+	{
+		SAW_EXPECT(c.at({{0u,0u}}).get() == 3.0, std::string{"Unexpected value at (0,0): "} + std::to_string(c.at({{0u,0u}}).get()) );
+		SAW_EXPECT(c.at({{0u,1u}}).get() == 5.0, std::string{"Unexpected value at (0,1): "} + std::to_string(c.at({{0u,1u}}).get()));
+		SAW_EXPECT(c.at({{1u,0u}}).get() == 7.0, std::string{"Unexpected value at (1,0): "} + std::to_string(c.at({{1u,0u}}).get()));
+		SAW_EXPECT(c.at({{1u,1u}}).get() == 9.0, std::string{"Unexpected value at (1,1): "} + std::to_string(c.at({{1u,1u}}).get()));
+	}
 }
 }
-- 
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