From 60eefb228c9b5c2846d3640d68ae5a7ccb0c254d Mon Sep 17 00:00:00 2001
From: "Claudius \"keldu\" Holeksa" <mail@keldu.de>
Date: Mon, 1 Jun 2026 16:09:22 +0200
Subject: Adding unary - operator

---
 modules/codec/c++/data.hpp      |  4 ++++
 modules/codec/c++/data_math.hpp | 13 +++++++++++++
 modules/codec/tests/math.cpp    |  2 ++
 3 files changed, 19 insertions(+)

(limited to 'modules')

diff --git a/modules/codec/c++/data.hpp b/modules/codec/c++/data.hpp
index ae9d8eb..79a6ab8 100644
--- a/modules/codec/c++/data.hpp
+++ b/modules/codec/c++/data.hpp
@@ -171,6 +171,10 @@ public:
 	constexpr data<Schema, encode::Native> operator-(const data<Schema, encode::Native>& rhs)const{
 		return {get() - rhs.get()};
 	}
+	
+	constexpr data<Schema, encode::Native> operator-() const {
+		return {-get()};
+	}
 
 	constexpr data<Schema, encode::Native>& operator++() {
 		set(get() + static_cast<typename native_data_type<Schema>::type>(1));
diff --git a/modules/codec/c++/data_math.hpp b/modules/codec/c++/data_math.hpp
index 48dae91..9d07eb3 100644
--- a/modules/codec/c++/data_math.hpp
+++ b/modules/codec/c++/data_math.hpp
@@ -131,6 +131,19 @@ public:
 		return c;
 	}
 
+	data<schema::Tensor<Inner, Dims...>, encode::Native> operator-() const {
+		data<schema::Tensor<Inner, Dims...>, encode::Native> c;
+
+		rank_iterator<Dims...>::in_fixed_bounds([&](const data<schema::FixedArray<schema::UInt64, sizeof...(Dims)>, encode::Native>& index) -> error_or<void>{
+			c.at(index) = -at(index);
+			return make_void();
+		});
+
+		return c;
+	}
+
+
+
 	template<typename InnerChange>
 	data<schema::Tensor<InnerChange, Dims...>, encode::Native> cast_to() const {
 		data<schema::Tensor<InnerChange, Dims...>, encode::Native> native_change;
diff --git a/modules/codec/tests/math.cpp b/modules/codec/tests/math.cpp
index 34dcce8..18b6c41 100644
--- a/modules/codec/tests/math.cpp
+++ b/modules/codec/tests/math.cpp
@@ -76,6 +76,8 @@ SAW_TEST("Math/Tensor"){
 		SAW_EXPECT(d.at({{1u,0u}}).get() == 1.0, std::string{"Unexpected value at (1,0): "} + std::to_string(d.at({{1u,0u}}).get()));
 		SAW_EXPECT(d.at({{1u,1u}}).get() == 1.0, std::string{"Unexpected value at (1,1): "} + std::to_string(d.at({{1u,1u}}).get()));
 	}
+
+	auto e = -a;
 }
 
 SAW_TEST("Math/Rotate"){
-- 
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