From cb9fa588ba8144fcdd52ba4b83d69d93fb18066f Mon Sep 17 00:00:00 2001
From: Dominick Allen <djallen@librehumanitas.org>
Date: Sun, 30 Mar 2025 23:08:43 -0500
Subject: Add hash map.

---
 include/fud_vector.hpp | 62 +++++++++++++++++++++++++++++++++++++-------------
 1 file changed, 46 insertions(+), 16 deletions(-)

(limited to 'include/fud_vector.hpp')

diff --git a/include/fud_vector.hpp b/include/fud_vector.hpp
index 0a9abf3..fd01cd0 100644
--- a/include/fud_vector.hpp
+++ b/include/fud_vector.hpp
@@ -33,14 +33,20 @@
 
 namespace fud {
 
+/** \brief Vector storing elements of T using a custom allocator. */
 template <typename T>
 class Vector {
     static constexpr size_t ElementSize = sizeof(T);
     static constexpr size_t Alignment = alignof(T);
 
   public:
+    /** \brief Construct a vector implictly using the globalFudAllocator. */
     constexpr Vector() noexcept = default;
-    constexpr explicit Vector(Allocator& allocator) noexcept : m_allocator{&allocator} {}
+
+    /** \brief Construct a vector explicitly using the specified allocator. */
+    constexpr explicit Vector(Allocator& allocator) noexcept : m_allocator{&allocator}
+    {
+    }
     constexpr Vector(const Vector<T>& rhs) = delete;
     constexpr Vector(Vector<T>&& rhs) noexcept :
         m_allocator(rhs.m_allocator), m_data(rhs.m_data), m_length{rhs.m_length}, m_capacity{rhs.m_capacity}
@@ -77,7 +83,8 @@ class Vector {
         return *this;
     }
 
-    static constexpr Vector<T> NullVector() noexcept {
+    static constexpr Vector<T> NullVector() noexcept
+    {
         Vector<T> output{};
         output.m_allocator = &globalNullAllocator;
         return output;
@@ -134,10 +141,7 @@ class Vector {
         return Okay<Vector<T>>{std::move(output)};
     }
 
-    static FudStatus initializeWithSize(
-        Vector<T>& output,
-        size_t count,
-        Allocator* allocator = &globalFudAllocator)
+    static FudStatus initializeWithSize(Vector<T>& output, size_t count, Allocator* allocator = &globalFudAllocator)
     {
         if (output.m_data != nullptr) {
             return FudStatus::AlreadyInitialized;
@@ -224,7 +228,7 @@ class Vector {
         if (status != FudStatus::Success) {
             return status;
         }
-        return output;
+        return Okay{std::move(output)};
     }
 
     template <size_t Size>
@@ -235,7 +239,7 @@ class Vector {
         if (status != FudStatus::Success) {
             return status;
         }
-        return output;
+        return Okay{std::move(output)};
     }
 
     template <size_t Size>
@@ -251,6 +255,30 @@ class Vector {
         }
     }
 
+    template <typename... Args>
+    static Result<Vector<T>, FudStatus> from(Option<Allocator*> allocatorOpt, Args&&... args)
+    {
+        constexpr size_t size = sizeof...(args);
+        Vector<T> output{};
+        Allocator* allocator = allocatorOpt.hasValue() ? allocatorOpt.value() : &globalFudAllocator;
+        auto status = Vector::initializeWithCapacity(output, size, allocator);
+        if (status != FudStatus::Success) {
+            return Error{status};
+        }
+        output.m_length = size;
+        size_t index = 0;
+        /*
+        for (size_t index = 0; index < output.m_length; ++index) {
+            
+        }
+        */
+        ([&]() {
+            output.m_data[index] = std::forward<T>(args);
+            ++index;
+        } (), ...);
+        return Okay{std::move(output)};
+    }
+
     static Vector<T> move(Vector<T>&& rhs) noexcept
     {
         return Vector<T>{std::move(rhs)};
@@ -270,6 +298,11 @@ class Vector {
         return m_capacity;
     }
 
+    [[nodiscard]] bool empty() const
+    {
+        return m_length == 0;
+    }
+
     Result<Span<const T>, FudStatus> span() const
     {
         using RetType = Result<Span<const T>, FudStatus>;
@@ -367,7 +400,7 @@ class Vector {
         auto status = FudStatus::Success;
         if (m_capacity > 0) {
             // NOLINTNEXTLINE(cppcoreguidelines-pro-type-reinterpret-cast)
-            m_allocator->deallocate(reinterpret_cast<std::byte*>(m_data), m_capacity);
+            m_allocator->deallocate(reinterpret_cast<std::byte*>(m_data), m_capacity * ElementSize);
         }
 
         m_data = dataPtr;
@@ -647,8 +680,7 @@ class Vector {
         if (std::numeric_limits<size_t>::max() - Size < m_length) {
             return FudStatus::Failure;
         }
-        if (m_length + Size > m_capacity)
-        {
+        if (m_length + Size > m_capacity) {
             size_t currentLength = m_length;
             auto status = resize(m_length + Size);
             m_length = currentLength;
@@ -674,8 +706,7 @@ class Vector {
         if (std::numeric_limits<size_t>::max() - span.size() < m_length) {
             return FudStatus::Failure;
         }
-        if (m_length + span.size() > m_capacity)
-        {
+        if (m_length + span.size() > m_capacity) {
             size_t currentLength = m_length;
             auto status = resize(m_length + span.size());
             m_length = currentLength;
@@ -700,8 +731,7 @@ class Vector {
         }
 
         m_data[index].~T();
-        for (size_t fwdIndex = index; fwdIndex + 1 < m_length; fwdIndex++)
-        {
+        for (size_t fwdIndex = index; fwdIndex + 1 < m_length; fwdIndex++) {
             m_data[fwdIndex] = std::move(m_data[fwdIndex + 1]);
         }
         m_data[m_length - 1].~T();
@@ -743,7 +773,7 @@ class Vector {
 
         if (m_data != nullptr && m_allocator != nullptr) {
             // NOLINTNEXTLINE(cppcoreguidelines-pro-type-reinterpret-cast)
-            m_allocator->deallocate(reinterpret_cast<std::byte*>(m_data), m_capacity);
+            m_allocator->deallocate(reinterpret_cast<std::byte*>(m_data), m_capacity * ElementSize);
         }
 
         m_allocator = nullptr;
-- 
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