From f36a545b0f814d8d35e87262dd80d4d8d8dc4405 Mon Sep 17 00:00:00 2001
From: "Claudius \"keldu\" Holeksa" <mail@keldu.de>
Date: Wed, 6 Aug 2025 14:20:21 +0200
Subject: Extended math setup. Need meta iteration for multi dim array :/

---
 modules/codec/c++/data_math.hpp   | 37 +++++++++++++++++++++++++++++++++++++
 modules/codec/c++/schema_math.hpp | 26 +++++++++++++++++---------
 modules/codec/tests/math.cpp      | 32 ++++++++++++++++++++++++++++++++
 3 files changed, 86 insertions(+), 9 deletions(-)
 create mode 100644 modules/codec/tests/math.cpp

diff --git a/modules/codec/c++/data_math.hpp b/modules/codec/c++/data_math.hpp
index a5c50fc..7277168 100644
--- a/modules/codec/c++/data_math.hpp
+++ b/modules/codec/c++/data_math.hpp
@@ -1,10 +1,12 @@
 #pragma once
 
+#include "data.hpp"
 #include "schema_math.hpp"
 
 #include <cmath>
 
 namespace saw {
+/*
 template<typename T>
 class data<schema::Quaternion<T>,encode::Native> {
 public:
@@ -61,5 +63,40 @@ public:
 		return mult;
 	}
 };
+*/
+
+template<typename Inner, uint64_t... Dims>
+class data<schema::Tensor<Inner, Dims...>, encode::Native> {
+public:
+	using Schema = schema::Tensor<Inner, Dims...>;
+private:
+	data<schema::Array<Inner,Schema::Rank>, encode::Native> values_;
+public:
+	data():
+		values_{data<schema::FixedArray<schema::UInt64,sizeof...(Dims)>>{{data<schema::UInt64, encode::Native>{Dims}...}}}
+	{}
+
+	data<Inner, encode::Native>& at(const data<schema::FixedArray<schema::UInt64>, encode::Native>& index){
+		return values_.at(index);
+	}
+
+	const data<Inner, encode::Native>& at(const data<schema::FixedArray<schema::UInt64>, encode::Native>& index) const {
+		return values_.at(index);
+	}
+
+	data<Inner, encode::Native>& operator()(const data<schema::FixedArray<schema::UInt64>, encode::Native>& index){
+		return values_.at(index);
+	}
+
+	const data<Inner, encode::Native>& operator()(const data<schema::FixedArray<schema::UInt64>, encode::Native>& index) const {
+		return values_.at(index);
+	}
+
+	data<schema::Tensor<Inner, Dims...>, encode::Native> operator+(const data<schema::Tensor<Inner, Dims...>, encode::Native>& rhs) const {
+		data<schema::Tensor<Inner, Dims...>, encode::Native> c;
+
+		return {};
+	}
+};
 
 }
diff --git a/modules/codec/c++/schema_math.hpp b/modules/codec/c++/schema_math.hpp
index 203b88a..ddf95a0 100644
--- a/modules/codec/c++/schema_math.hpp
+++ b/modules/codec/c++/schema_math.hpp
@@ -4,17 +4,25 @@
 
 namespace saw {
 namespace schema {
-template<typename T>
-struct Complex {};
 
-template<typename T>
-struct Quaternion {
-	static_assert(is_primitive<T>::value, "Quaternions assume a primitive type");
+/**
+ * Tensor Schema. I think I need this due to the amount of mathematical operators being able to be represented by this one construct.
+ */
+template<typename Inner, uint64_t... D>
+struct Tensor {
+	static constexpr uint64_t Rank = sizeof...(D);
+	static constexpr std::array<uint64_t,Rank> Dimension{D...};
+	static constexpr string_literal name = "Tensor";
 };
 
-template<typename T, uint64_t D>
-struct Euler {
-	static_assert(is_primitive<T>::value, "Quaternions assume a primitive type");
-};
+template<typename Inner>
+using Scalar = Tensor<Inner>;
+
+template<typename Inner, uint64_t D>
+using Vector = Tensor<Inner,D>;
+
+template<typename Inner, uint64_t D1, uint64_t D2>
+using Matrix = Tensor<Inner,D1,D2>;
+
 }
 }
diff --git a/modules/codec/tests/math.cpp b/modules/codec/tests/math.cpp
new file mode 100644
index 0000000..4240df5
--- /dev/null
+++ b/modules/codec/tests/math.cpp
@@ -0,0 +1,32 @@
+#include <forstio/test/suite.hpp>
+#include "../c++/data.hpp"
+#include "../c++/data_math.hpp"
+#include "../c++/csv.hpp"
+
+#include <iostream>
+
+namespace {
+namespace sch {
+using namespace saw::schema;
+}
+/*
+SAW_TEST("Math/Basic"){
+	using namespace saw;
+
+	data<sch::Vector<sch::Float64,2u>> a;
+	data<sch::Vector<sch::Float64,2u>> b;
+
+	auto c = a + b;
+}
+*/
+
+SAW_TEST("Math/Tensor"){
+	using namespace saw;
+
+	data<sch::Matrix<sch::Float64,2u,2u> > a;
+
+	data<sch::Matrix<sch::Float64,2u,2u> > b;
+
+	auto c = a + b;
+}
+}
-- 
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