Merge pull request #658 from OpenVicProject/add_typed_span

Add TypedSpan

Author: wvpm

src/openvic-simulation/types/TypedSpan.hpp

@@ -0,0 +1,32 @@
+#pragma once
+
+#include <span>
+
+#include <type_safe/strong_typedef.hpp>
+
+#include "openvic-simulation/utility/Concepts.hpp"
+#include "openvic-simulation/utility/ForwardableSpan.hpp"
+
+namespace OpenVic {
+	template<
+		derived_from_specialization_of<type_safe::strong_typedef> IndexType,
+		typename ValueType,
+		size_t _Extent = std::dynamic_extent
+	>
+	struct TypedSpan : public utility::forwardable_span<ValueType, _Extent> {
+	public:
+		using utility::forwardable_span<ValueType, _Extent>::forwardable_span;
+
+		constexpr IndexType size() const {
+			return IndexType(std::span<ValueType, _Extent>::size());
+		}
+
+		constexpr utility::forwardable_span<ValueType, _Extent>::reference operator[](const IndexType _Off) const {
+			return utility::forwardable_span<ValueType, _Extent>::operator[](static_cast<std::size_t>(type_safe::get(_Off)));
+		}
+
+		constexpr operator TypedSpan<IndexType, const ValueType, _Extent>() {
+			return TypedSpan<IndexType, const ValueType, _Extent>{*this};
+		}
+	};
+}