feat: kernel & libSystem: improvements and tweaks.

feat: docs: wip design of Launch.

Signed-off-by: Amlal El Mahrouss <amlal@nekernel.org>

1 files changed, 38 insertions, 0 deletions

diff --git a/dev/kernel/NeKit/Pair.h b/dev/kernel/NeKit/Pair.h
index aeeeb8a2..61668f5a 100644
--- a/dev/kernel/NeKit/Pair.h
+++ b/dev/kernel/NeKit/Pair.h
@@ -6,8 +6,46 @@
 
 #pragma once
 
+#include <CompilerKit/CompilerKit.h>
 #include <NeKit/Defines.h>
+#include <NeKit/ErrorOr.h>
 
 namespace Kernel {
+template <typename T1, typename T2>
 class Pair;
+
+class PairBuilder;
+
+template <typename T1, typename T2>
+class Pair final {
+  T1 fFirst{nullptr};
+  T2 fSecond{nullptr};
+
+  friend PairBuilder;
+
+ public:
+  explicit Pair() = default;
+  ~Pair()         = default;
+
+  NE_COPY_DEFAULT(Pair)
+
+  T1& First() { return fFirst; }
+  T2& Second() { return fSecond; }
+
+  const T1& First() const { return *fFirst; }
+  const T2& Second() const { return *fSecond; }
+
+ private:
+  Pair(T1 first, T2 second) : fFirst(first), fSecond(second) {}
+};
+
+class PairBuilder final {
+  template <typename T1, typename T2>
+  STATIC Pair<T1, T2> Construct(T1 first, T2 second) {
+    return Pair(first, second);
+  }
+};
+
+template <typename T1, typename T2>
+using PairOr = ErrorOr<Pair<T1, T2>>;
 }  // namespace Kernel