From 9383579d43f834519d5061527f749acf8dca59c6 Mon Sep 17 00:00:00 2001
From: "Claudius \"keldu\" Holeksa" <mail@keldu.de>
Date: Thu, 16 Jul 2026 15:10:27 +0200
Subject: Prepping for abstract data in lbm

---
 modules/core/c++/abstract/alloc.hpp            |  9 ++++
 modules/core/c++/abstract/data.hpp             | 53 +++++-----------------
 modules/core/c++/abstract/encode.hpp           |  9 ++++
 modules/core/c++/abstract/schema.hpp           | 60 +++++++++++++++++++++++++
 modules/core/c++/abstract/string_literal.hpp   | 61 ++++++++++++++++++++++++++
 modules/core/c++/abstract/stringify_schema.hpp | 51 +++++++++++++++++++++
 6 files changed, 200 insertions(+), 43 deletions(-)
 create mode 100644 modules/core/c++/abstract/alloc.hpp
 create mode 100644 modules/core/c++/abstract/encode.hpp
 create mode 100644 modules/core/c++/abstract/schema.hpp
 create mode 100644 modules/core/c++/abstract/string_literal.hpp
 create mode 100644 modules/core/c++/abstract/stringify_schema.hpp

diff --git a/modules/core/c++/abstract/alloc.hpp b/modules/core/c++/abstract/alloc.hpp
new file mode 100644
index 0000000..b15e737
--- /dev/null
+++ b/modules/core/c++/abstract/alloc.hpp
@@ -0,0 +1,9 @@
+#pragma once
+
+namespace kel {
+namespace lbm {
+namespace all {
+struct Native {};
+}
+}
+}
diff --git a/modules/core/c++/abstract/data.hpp b/modules/core/c++/abstract/data.hpp
index ed23268..f1ae5a7 100644
--- a/modules/core/c++/abstract/data.hpp
+++ b/modules/core/c++/abstract/data.hpp
@@ -1,52 +1,19 @@
 #pragma once
 
-#include "templates.hpp"
+#include "schema.hpp"
+#include "encode.hpp"
 
 namespace kel {
-namespace sch {
-struct Void {};
-
-struct UnsignedInteger {};
-struct SignedInteger {};
-struct FloatingPoint {};
-
-template<typename StorageT, typename InterfaceT>
-struct MixedPrecision {
-	using Meta = Void;
-	using StorageType = StorageT;
-	using InterfaceType = InterfaceT;
-};
-
-template<typename PrimType, uint64_t N>
-struct Primitive {
-	using Meta = Void;
-	using Type = PrimType;
-	static constexpr uint64_t Bytes = N;
-};
-
-template<typename T, uint64_t... Dims>
-struct FixedArray {
-	using Meta = Void;
-	using Inner = T;
-	static constexpr std::array<uint64_t,sizeof...(Dims)> Dimensions{Dims...};
+namespace lbm {
+template<typename Schema, typename Encode = enc::Native>
+class data final {};
+
+template<typename T, uint64_t N>
+class data<sch::Primitive<T,N>,Encode> final {
+private:
+public:
 };
 
-template<typename T, uint64_t Dims>
-struct Array {
-	using Meta = FixedArray<UInt64,Dims>;
-	using Inner = T;
-	static constexpr std::array<uint64_t,sizeof...(Dims)> Dimensions{Dims};
-};
-
-template<typename... T>
-struct Tuple {
-};
 
 }
-
-template<typename Sch>
-struct schema {
-	using Type = Sch;
-};
-
 }
diff --git a/modules/core/c++/abstract/encode.hpp b/modules/core/c++/abstract/encode.hpp
new file mode 100644
index 0000000..64aef4a
--- /dev/null
+++ b/modules/core/c++/abstract/encode.hpp
@@ -0,0 +1,9 @@
+#pragma once
+
+namespace kel {
+namespace lbm {
+namespace enc {
+struct Native {};
+}
+}
+}
diff --git a/modules/core/c++/abstract/schema.hpp b/modules/core/c++/abstract/schema.hpp
new file mode 100644
index 0000000..8305005
--- /dev/null
+++ b/modules/core/c++/abstract/schema.hpp
@@ -0,0 +1,60 @@
+#pragma once
+
+#include "string_literal.hpp"
+#include "templates.hpp"
+
+namespace kel {
+namespace sch {
+struct Void {};
+
+struct UnsignedInteger {};
+struct SignedInteger {};
+struct FloatingPoint {};
+
+template<typename StorageT, typename InterfaceT>
+struct MixedPrecision {
+	using Meta = Void;
+	using StorageType = StorageT;
+	using InterfaceType = InterfaceT;
+};
+
+template<typename PrimType, uint64_t N>
+struct Primitive {
+	using Meta = Void;
+	using StorageType = PrimType;
+	using InterfaceType = PrimType;
+	static constexpr uint64_t Bytes = N;
+};
+
+template<typename T, uint64_t... Dims>
+struct FixedArray {
+	using Meta = Void;
+	using Inner = T;
+	static constexpr std::array<uint64_t,sizeof...(Dims)> Dimensions{Dims...};
+};
+
+template<typename T, uint64_t Dims>
+struct Array {
+	using Meta = FixedArray<UInt64,Dims>;
+	using Inner = T;
+	static constexpr std::array<uint64_t,sizeof...(Dims)> Dimensions{Dims};
+};
+
+template<typename... T>
+struct Tuple {
+};
+
+template<typename Value, string_literal Key>
+struct Member {};
+
+template<typename... SL>
+struct Struct {};
+
+}
+
+template<typename Sch>
+struct schema {
+	using Type = Sch;
+};
+
+}
diff --git a/modules/core/c++/abstract/string_literal.hpp b/modules/core/c++/abstract/string_literal.hpp
new file mode 100644
index 0000000..51e58c8
--- /dev/null
+++ b/modules/core/c++/abstract/string_literal.hpp
@@ -0,0 +1,61 @@
+#pragma once
+
+#include <array>
+#include <string_view>
+
+namespace kel {
+namespace lbm {
+/**
+ * Helper object which creates a templated string from the provided string
+ * literal. It guarantees compile time uniqueness and thus allows using strings
+ * in template parameters.
+ */
+template <class CharT, size_t N> class string_literal {
+public:
+    static_assert(N > 0, "string_literal needs a null terminator");
+
+	constexpr string_literal(const CharT (&input)[N]) noexcept {
+		for (size_t i = 0; i < N; ++i) {
+			data[i] = input[i];
+		}
+	}
+
+	std::array<CharT, N> data{};
+
+	constexpr std::string_view view() const noexcept {
+		return std::string_view{data.data()};
+	}
+
+	constexpr bool
+	operator==(const string_literal<CharT, N> &) const noexcept = default;
+
+	template <class CharTR, size_t NR>
+	constexpr bool
+	operator==(const string_literal<CharTR, NR> &) const noexcept {
+		return false;
+	}
+
+	template<size_t NR>
+    constexpr string_literal<CharT, N+NR-1> operator+(const string_literal<CharT, NR>& rhs) const noexcept {
+		CharT sum[N+NR-1];
+
+		// The weird i+1 happens due to needing to skip the '\0' terminator
+		for(size_t i = 0; (i+1) < N; ++i){
+				sum[i] = data[i];
+		}
+		for(size_t i = 0; i < NR; ++i){
+				sum[i+N-1] = rhs.data[i];
+		}
+
+		return string_literal<CharT, N+NR-1>{sum};
+	}
+
+
+};
+
+template <typename T, T... Chars>
+constexpr string_literal<T, sizeof...(Chars) + 1u> operator""_sl() {
+	return string_literal<T, sizeof...(Chars) + 1u>{{Chars..., '\0'}};
+}
+}
+}
diff --git a/modules/core/c++/abstract/stringify_schema.hpp b/modules/core/c++/abstract/stringify_schema.hpp
new file mode 100644
index 0000000..866bc7e
--- /dev/null
+++ b/modules/core/c++/abstract/stringify_schema.hpp
@@ -0,0 +1,51 @@
+#pragma once
+
+#include "schema.hpp"
+
+namespace kel {
+namespace lbm {
+namespace impl {
+template<class T>
+struct schema_to_string_helper {
+	static_assert(always_false<T>, "schema_to_string_helper specialization not handled.");
+
+	static constexpr string_literal apply(){
+		return {};
+	}
+};
+
+template<>
+struct schema_to_string_helper<sch::SignedInteger> final {
+	static constexpr string_literal apply(){
+		return "SignedInteger";
+	}
+};
+
+template<>
+struct schema_to_string_helper<sch::UnsignedInteger> final {
+	static constexpr string_literal apply(){
+		return "UnsignedInteger";
+	}
+};
+
+template<>
+struct schema_to_string_helper<sch::FloatingPoint> final {
+	static constexpr string_literal apply(){
+		return "FloatingPoint";
+	}
+};
+
+template<typename T, uint64_t N>
+struct schema_to_string_helper<sch::Primitive<T,N>> final {
+	static constexpr string_literal apply(){
+		return "Primitive<"+schema_to_string_helper<T>::apply()+","+N+">";
+	}
+};
+}
+
+template<class T>
+struct schema_to_string{
+	static constexpr std::string_view value = impl::schema_to_string_helper<T>::apply().view();
+};
+}
+}
-- 
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