From 8f7b1cd4e3809b0feb721f1c9bed67be2a1ca541 Mon Sep 17 00:00:00 2001
From: Andreas Tsouchlos <an.tsouchlos@gmail.com>
Date: Sun, 20 Feb 2022 00:14:33 +0100
Subject: [PATCH] Implemented std::array and a bunch of other stuff

---
 const_fmt/std_lib.h | 92 ++++++++++++++++++++++++++++++++++++---------
 1 file changed, 74 insertions(+), 18 deletions(-)

diff --git a/const_fmt/std_lib.h b/const_fmt/std_lib.h
index 6432bed..305e066 100644
--- a/const_fmt/std_lib.h
+++ b/const_fmt/std_lib.h
@@ -2,10 +2,14 @@
 #define CONST_FMT_STD_LIB_H
 
 
-#ifdef CONST_FMT_NO_STD_LIB
+#ifndef CONST_FMT_NO_CPP_STD_LIB
 
+#include <array>
+
+#else
 
 #include <stdint.h>
+#include <string.h>
 
 
 namespace std {
@@ -14,47 +18,99 @@ namespace std {
 using size_t = uint16_t;
 
 
+/*
+ *
+ * type_traits
+ *
+ */
+
+
+// clang-format off
+
+template<typename T> struct remove_reference      { using type = T; };
+template<typename T> struct remove_reference<T&>  { using type = T; };
+template<typename T> struct remove_reference<T&&> { using type = T; };
+
+template<typename T>
+using remove_reference_t = typename std::remove_reference<T>::type;
+
+// clang-format on
+
+
+/*
+ *
+ * utility
+ *
+ */
+
+
+template <typename T>
+std::remove_reference_t<T>&& move(T&& arg) noexcept {
+    return reinterpret_cast<std::remove_reference_t<T>&&>(arg);
+}
+
+template <typename T>
+void swap(T& t1, T& t2) {
+    T temp = std::move(t1);
+    t1     = std::move(t2);
+    t2     = std::move(temp);
+}
+
+
+/*
+ *
+ * std::array
+ *
+ */
+
+
 // TODO: Is std::size_t really the best bet here?
 template <typename data_t, std::size_t t_size>
 class array {
 public:
-    // Constructors
+    template<typename... args_t>
+    constexpr array(args_t... args) noexcept : m_data{args...} {
+        static_assert(sizeof...(args) == t_size, "Invalid number of arguments");
+    }
 
-    array() = default;
-    array(const array& other) = default;
-    array(array&& other) = default;
+    constexpr array() noexcept = default;
+    constexpr array(array&) = default;
+    constexpr array(array&&) = default;
 
-    // Operators
+    constexpr array& operator=(array& other) = default;
+    constexpr array& operator=(array&& other) = default;
 
-    array operator=(const array& other) = default;
-    array operator=(array&& other) = default;
+    constexpr void swap(array<data_t, t_size>& other) noexcept {
+        for (int i = 0; i < t_size; ++i) {
+            using std::swap;
+            swap(m_data[i], other.m_data[i]);
+        }
+    }
 
-    // Element access
 
-    data_t& operator[](std::size_t index) {
+    constexpr data_t& operator[](std::size_t index) noexcept {
         return m_data[index];
     }
-    const data_t& operator[](std::size_t index) const {
+    constexpr const data_t& operator[](std::size_t index) const noexcept {
         return m_data[index];
     }
 
-    // Iterators
 
     using iterator       = data_t*;
     using const_iterator = const data_t*;
 
-    iterator begin() {
+    constexpr iterator begin() noexcept {
         return &(m_data[0]);
     }
-    iterator end() {
-        return (&(m_data[t_size-1]) + 1);
+    constexpr iterator end() noexcept {
+        return (&(m_data[t_size - 1]) + 1);
     }
 
-    const iterator cbegin() const {
+    constexpr const_iterator cbegin() const noexcept {
         return &(m_data[0]);
     }
-    const iterator cend() const {
-        return (&(m_data[t_size-1]) + 1);
+    constexpr const_iterator cend() const noexcept {
+        return (&(m_data[t_size - 1]) + 1);
     }
 
 private: