diff --git a/CMakeLists.txt b/CMakeLists.txt
index 80e38d3..abb619a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.20)
 include(cmake/color.cmake)
-set(BLT_VERSION 0.20.26)
+set(BLT_VERSION 0.21.0)
 set(BLT_TEST_VERSION 0.0.1)
 
 set(BLT_TARGET BLT)
@@ -69,7 +69,8 @@ if (${BUILD_FORMAT})
     message(STATUS "Building ${Yellow}format${ColourReset} cxx files")
     file(GLOB_RECURSE FORMAT_FILES "${CMAKE_CURRENT_SOURCE_DIR}/src/blt/format/*.cpp")
 else ()
-    set(FORMAT_FILES "")
+    set(FORMAT_FILES ""
+            include/blt/std/iterator.h)
 endif ()
 
 if (EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/libraries/parallel-hashmap)
diff --git a/include/blt/std/allocator.h b/include/blt/std/allocator.h
index 64b641c..91e7e5d 100644
--- a/include/blt/std/allocator.h
+++ b/include/blt/std/allocator.h
@@ -22,6 +22,7 @@
     #include <limits>
     #include <vector>
     #include <blt/std/ranges.h>
+    #include <blt/std/iterator.h>
     #include <blt/std/utility.h>
     #include <blt/std/types.h>
     #include <blt/std/assert.h>
diff --git a/include/blt/std/iterator.h b/include/blt/std/iterator.h
new file mode 100644
index 0000000..4d70916
--- /dev/null
+++ b/include/blt/std/iterator.h
@@ -0,0 +1,326 @@
+#pragma once
+/*
+ *  Copyright (C) 2024  Brett Terpstra
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef BLT_ITERATOR_H
+#define BLT_ITERATOR_H
+
+#include <blt/std/types.h>
+#include <blt/meta/meta.h>
+#include <blt/meta/iterator.h>
+#include <type_traits>
+#include <iterator>
+
+namespace blt
+{
+    
+    template<typename Iter, typename = std::void_t<>>
+    class enumerator;
+    
+    template<typename Iter, typename = std::void_t<>>
+    class enumerator_rev;
+    
+    namespace iterator
+    {
+        template<typename Iter, typename = std::void_t<>>
+        class enumerate_wrapper;
+        
+        template<typename T>
+        struct enumerate_item
+        {
+            blt::size_t index;
+            T value;
+        };
+        
+        template<typename Iter>
+        class enumerate_iterator_base
+        {
+            public:
+                explicit enumerate_iterator_base(Iter iter, blt::size_t place = 0): iter(std::move(iter)), index(place)
+                {}
+                
+                enumerate_item<blt::meta::deref_return_t<Iter>> operator*() const
+                {
+                    return {index, *this->iter};
+                }
+                
+                friend bool operator==(const enumerate_iterator_base& a, const enumerate_iterator_base& b)
+                {
+                    return a.iter == b.iter;
+                }
+                
+                friend bool operator!=(const enumerate_iterator_base& a, const enumerate_iterator_base& b)
+                {
+                    return a.iter != b.iter;
+                }
+                
+                auto base() const
+                {
+                    return iter;
+                }
+                
+                auto get_index() const
+                {
+                    return index;
+                }
+            
+            protected:
+                Iter iter;
+                blt::size_t index;
+        };
+        
+        template<typename Iter>
+        class enumerate_forward_iterator : public enumerate_iterator_base<Iter>
+        {
+            public:
+                using enumerate_iterator_base<Iter>::enumerate_iterator_base;
+                
+                enumerate_forward_iterator& operator++()
+                {
+                    ++this->iter;
+                    ++this->index;
+                    return *this;
+                }
+                
+                enumerate_forward_iterator operator++(int)
+                {
+                    auto tmp = *this;
+                    ++*this;
+                    return tmp;
+                }
+        };
+        
+        template<typename Iter>
+        class enumerate_bidirectional_iterator : public enumerate_forward_iterator<Iter>
+        {
+            public:
+                using enumerate_forward_iterator<Iter>::enumerate_forward_iterator;
+                
+                enumerate_bidirectional_iterator& operator--()
+                {
+                    --this->iter;
+                    --this->index;
+                    return *this;
+                }
+                
+                enumerate_bidirectional_iterator operator--(int)
+                {
+                    auto tmp = *this;
+                    --*this;
+                    return tmp;
+                }
+        };
+        
+        template<typename Iter>
+        class enumerate_wrapper<Iter, std::enable_if_t<blt::meta::is_forward_iterator_v<Iter>, std::void_t<std::forward_iterator_tag>>>
+                : public enumerate_forward_iterator<Iter>
+        {
+            public:
+                using iterator_category = std::forward_iterator_tag;
+                using value_type = enumerate_item<blt::meta::deref_return_t<Iter>>;
+                using difference_type = typename std::iterator_traits<Iter>::difference_type;
+                using pointer = value_type;
+                using reference = value_type;
+                using iterator_type = Iter;
+                
+                using enumerate_forward_iterator<Iter>::enumerate_forward_iterator;
+        };
+        
+        template<typename Iter>
+        class enumerate_wrapper<Iter, std::enable_if_t<blt::meta::is_bidirectional_or_better_v<Iter>, std::void_t<std::bidirectional_iterator_tag>>>
+                : public enumerate_bidirectional_iterator<Iter>
+        {
+            public:
+                using iterator_category = typename std::iterator_traits<Iter>::iterator_category;
+                using value_type = enumerate_item<blt::meta::deref_return_t<Iter>>;
+                using difference_type = typename std::iterator_traits<Iter>::difference_type;
+                using pointer = value_type;
+                using reference = value_type;
+                using iterator_type = Iter;
+                
+                using enumerate_bidirectional_iterator<Iter>::enumerate_bidirectional_iterator;
+        };
+        
+        template<typename Iter, typename IterWrapper>
+        class enumerator_base
+        {
+            public:
+                explicit enumerator_base(Iter begin, Iter end): begin_(std::move(begin)), end_(std::move(end))
+                {}
+                
+                explicit enumerator_base(IterWrapper begin, IterWrapper end): begin_(std::move(begin)), end_(std::move(end))
+                {}
+                
+                auto begin()
+                {
+                    return begin_;
+                }
+                
+                auto end()
+                {
+                    return end_;
+                }
+            
+            protected:
+                IterWrapper begin_;
+                IterWrapper end_;
+        };
+        
+        template<typename Iter, typename IterWrapper>
+        class enumerator_reversible : public enumerator_base<Iter, IterWrapper>
+        {
+            public:
+                explicit enumerator_reversible(Iter begin, Iter end, blt::size_t container_size):
+                        enumerator_base<Iter, IterWrapper>{IterWrapper{enumerate_wrapper<Iter>{std::move(begin), 0}},
+                                                           IterWrapper{enumerate_wrapper<Iter>{std::move(end), container_size}}},
+                        container_size(container_size)
+                {}
+                
+                explicit enumerator_reversible(Iter begin, Iter end, blt::size_t begin_index, blt::size_t end_index, blt::size_t container_size):
+                        enumerator_base<Iter, IterWrapper>(IterWrapper{enumerate_wrapper<Iter>{std::move(begin), begin_index}},
+                                                           IterWrapper{enumerate_wrapper<Iter>{std::move(end), end_index}}),
+                        container_size(container_size)
+                {}
+                
+                auto rev() const
+                {
+                    return enumerator_rev<Iter>{this->end_.base(), this->begin_.base(), this->container_size, this->begin_.get_index(),
+                                                this->container_size};
+                }
+            
+            protected:
+                blt::size_t container_size;
+        };
+        
+        template<typename Iter, typename IterWrapper>
+        class enumerator_reversible_rev : public enumerator_reversible<Iter, IterWrapper>
+        {
+            public:
+                using enumerator_reversible<Iter, IterWrapper>::enumerator_reversible;
+                
+                auto rev() const
+                {
+                    return enumerator<Iter>{this->end_.base().base(), this->begin_.base().base(), this->end_.base().get_index(),
+                                            this->begin_.base().get_index(), this->container_size};
+                }
+        };
+    }
+    
+    template<typename Iter>
+    class enumerator<Iter, std::enable_if_t<blt::meta::is_forward_iterator_v<Iter>, std::void_t<std::forward_iterator_tag>>>
+            : public iterator::enumerator_base<Iter, iterator::enumerate_wrapper<Iter>>
+    {
+        public:
+            using iterator::enumerator_base<Iter, iterator::enumerate_wrapper<Iter>>::enumerator_base;
+    };
+    
+    template<typename Iter>
+    class enumerator<Iter, std::enable_if_t<blt::meta::is_bidirectional_iterator_v<Iter>, std::void_t<std::bidirectional_iterator_tag>>>
+            : public iterator::enumerator_reversible<Iter, iterator::enumerate_wrapper<Iter>>
+    {
+        public:
+            using iterator::enumerator_reversible<Iter, iterator::enumerate_wrapper<Iter>>::enumerator_reversible;
+            
+            auto skip(blt::size_t offset)
+            {
+            
+            }
+    };
+    
+    template<typename Iter>
+    class enumerator<Iter, std::enable_if_t<blt::meta::is_random_access_iterator_v<Iter>, std::void_t<std::random_access_iterator_tag>>>
+            : public iterator::enumerator_reversible<Iter, iterator::enumerate_wrapper<Iter>>
+    {
+        public:
+            using iterator::enumerator_reversible<Iter, iterator::enumerate_wrapper<Iter>>::enumerator_reversible;
+            
+            auto skip(blt::size_t offset)
+            {
+                return enumerator<Iter>{this->begin_.base() + offset,
+                                        this->end_.base(),
+                                        this->begin_.get_index() + offset,
+                                        this->end_.get_index(),
+                                        this->container_size};
+            }
+    };
+    
+    template<typename Iter>
+    class enumerator_rev<Iter, std::enable_if_t<blt::meta::is_bidirectional_iterator_v<Iter>, std::void_t<std::bidirectional_iterator_tag>>>
+            : public iterator::enumerator_reversible_rev<Iter, std::reverse_iterator<iterator::enumerate_wrapper<Iter>>>
+    {
+        public:
+            using iterator::enumerator_reversible_rev<Iter, std::reverse_iterator<iterator::enumerate_wrapper<Iter>>>::enumerator_reversible_rev;
+    };
+    
+    template<typename Iter>
+    class enumerator_rev<Iter, std::enable_if_t<blt::meta::is_random_access_iterator_v<Iter>, std::void_t<std::random_access_iterator_tag>>>
+            : public iterator::enumerator_reversible_rev<Iter, std::reverse_iterator<iterator::enumerate_wrapper<Iter>>>
+    {
+        public:
+            using iterator::enumerator_reversible_rev<Iter, std::reverse_iterator<iterator::enumerate_wrapper<Iter>>>::enumerator_reversible_rev;
+            
+            auto skip(blt::size_t offset)
+            {
+                return enumerator_rev<Iter>{this->begin_.base().base() - offset,
+                                            this->end_.base().base(),
+                                            this->begin_.base().get_index() - offset,
+                                            this->end_.base().get_index(), this->container_size};
+            }
+    };
+    
+    template<typename Iter>
+    enumerator(Iter, Iter) -> enumerator<Iter>;
+    
+    template<typename Iter>
+    enumerator(Iter, Iter, blt::size_t) -> enumerator<Iter>;
+    
+    template<typename Iter>
+    enumerator(Iter, Iter, blt::size_t, blt::size_t) -> enumerator<Iter>;
+    
+    template<typename T>
+    static inline auto enumerate(const T& container)
+    {
+        return enumerator{container.begin(), container.end(), container.size()};
+    }
+    
+    template<typename T, blt::size_t size>
+    static inline auto enumerate(const T(& container)[size])
+    {
+        return enumerator{&container[0], &container[size], size};
+    }
+    
+    template<typename T, blt::size_t size>
+    static inline auto enumerate(T(& container)[size])
+    {
+        return enumerator{&container[0], &container[size], size};
+    }
+    
+    template<typename T>
+    static inline auto enumerate(T& container)
+    {
+        return enumerator{container.begin(), container.end(), container.size()};
+    }
+    
+    template<typename T>
+    static inline auto enumerate(T&& container)
+    {
+        return enumerator{container.begin(), container.end(), container.size()};
+    }
+    
+}
+
+#endif //BLT_ITERATOR_H
diff --git a/include/blt/std/ranges.h b/include/blt/std/ranges.h
index 8795579..f987b9e 100644
--- a/include/blt/std/ranges.h
+++ b/include/blt/std/ranges.h
@@ -19,291 +19,8 @@
 
 namespace blt
 {
-    template<typename Iter, typename = std::void_t<>>
-    class enumerate_wrapper;
-    
-    template<typename Iter, typename = std::void_t<>>
-    class enumerator;
-    
-    template<typename Iter, typename = std::void_t<>>
-    class enumerator_rev;
-    
-    template<typename T>
-    struct enumerate_item
-    {
-        blt::size_t index;
-        T value;
-    };
-    
-    template<typename Iter>
-    class enumerate_iterator_base
-    {
-        public:
-            explicit enumerate_iterator_base(Iter iter, blt::size_t place = 0): iter(std::move(iter)), index(place)
-            {}
-            
-            enumerate_item<blt::meta::deref_return_t<Iter>> operator*() const
-            {
-                return {index, *this->iter};
-            }
-            
-            friend bool operator==(const enumerate_iterator_base& a, const enumerate_iterator_base& b)
-            {
-                return a.iter == b.iter;
-            }
-            
-            friend bool operator!=(const enumerate_iterator_base& a, const enumerate_iterator_base& b)
-            {
-                return a.iter != b.iter;
-            }
-            
-            auto base() const
-            {
-                return iter;
-            }
-            
-            auto get_index() const
-            {
-                return index;
-            }
-        
-        protected:
-            Iter iter;
-            blt::size_t index;
-    };
-    
-    template<typename Iter>
-    class enumerate_forward_iterator : public enumerate_iterator_base<Iter>
-    {
-        public:
-            using enumerate_iterator_base<Iter>::enumerate_iterator_base;
-            
-            enumerate_forward_iterator& operator++()
-            {
-                ++this->iter;
-                ++this->index;
-                return *this;
-            }
-            
-            enumerate_forward_iterator operator++(int)
-            {
-                auto tmp = *this;
-                ++*this;
-                return tmp;
-            }
-    };
-    
-    template<typename Iter>
-    class enumerate_bidirectional_iterator : public enumerate_forward_iterator<Iter>
-    {
-        public:
-            using enumerate_forward_iterator<Iter>::enumerate_forward_iterator;
-            
-            enumerate_bidirectional_iterator& operator--()
-            {
-                --this->iter;
-                --this->index;
-                return *this;
-            }
-            
-            enumerate_bidirectional_iterator operator--(int)
-            {
-                auto tmp = *this;
-                --*this;
-                return tmp;
-            }
-    };
-    
-    template<typename Iter>
-    class enumerate_wrapper<Iter, std::enable_if_t<blt::meta::is_forward_iterator_v<Iter>, std::void_t<std::forward_iterator_tag>>>
-            : public enumerate_forward_iterator<Iter>
-    {
-        public:
-            using iterator_category = std::forward_iterator_tag;
-            using value_type = enumerate_item<blt::meta::deref_return_t<Iter>>;
-            using difference_type = typename std::iterator_traits<Iter>::difference_type;
-            using pointer = value_type;
-            using reference = value_type;
-            using iterator_type = Iter;
-            
-            using enumerate_forward_iterator<Iter>::enumerate_forward_iterator;
-    };
-    
-    template<typename Iter>
-    class enumerate_wrapper<Iter, std::enable_if_t<blt::meta::is_bidirectional_or_better_v<Iter>, std::void_t<std::bidirectional_iterator_tag>>>
-            : public enumerate_bidirectional_iterator<Iter>
-    {
-        public:
-            using iterator_category = typename std::iterator_traits<Iter>::iterator_category;
-            using value_type = enumerate_item<blt::meta::deref_return_t<Iter>>;
-            using difference_type = typename std::iterator_traits<Iter>::difference_type;
-            using pointer = value_type;
-            using reference = value_type;
-            using iterator_type = Iter;
-            
-            using enumerate_bidirectional_iterator<Iter>::enumerate_bidirectional_iterator;
-    };
-    
-    template<typename Iter, typename IterWrapper>
-    class enumerator_base
-    {
-        public:
-            explicit enumerator_base(Iter begin, Iter end): begin_(std::move(begin)), end_(std::move(end))
-            {}
-            
-            explicit enumerator_base(IterWrapper begin, IterWrapper end): begin_(std::move(begin)), end_(std::move(end))
-            {}
-            
-            auto begin()
-            {
-                return begin_;
-            }
-            
-            auto end()
-            {
-                return end_;
-            }
-        
-        protected:
-            IterWrapper begin_;
-            IterWrapper end_;
-    };
-    
-    template<typename Iter, typename IterWrapper>
-    class enumerator_reversible : public enumerator_base<Iter, IterWrapper>
-    {
-        public:
-            explicit enumerator_reversible(Iter begin, Iter end, blt::size_t container_size):
-                    enumerator_base<Iter, IterWrapper>{IterWrapper{enumerate_wrapper<Iter>{std::move(begin), 0}},
-                                                       IterWrapper{enumerate_wrapper<Iter>{std::move(end), container_size}}},
-                    container_size(container_size)
-            {}
-            
-            explicit enumerator_reversible(Iter begin, Iter end, blt::size_t begin_index, blt::size_t end_index, blt::size_t container_size):
-                    enumerator_base<Iter, IterWrapper>(IterWrapper{enumerate_wrapper<Iter>{std::move(begin), begin_index}},
-                                                       IterWrapper{enumerate_wrapper<Iter>{std::move(end), end_index}}),
-                    container_size(container_size)
-            {}
-            
-            auto rev() const
-            {
-                return enumerator_rev<Iter>{this->end_.base(), this->begin_.base(), this->container_size, this->begin_.get_index(),
-                                            this->container_size};
-            }
-        
-        protected:
-            blt::size_t container_size;
-    };
-    
-    template<typename Iter, typename IterWrapper>
-    class enumerator_reversible_rev : public enumerator_reversible<Iter, IterWrapper>
-    {
-        public:
-            using enumerator_reversible<Iter, IterWrapper>::enumerator_reversible;
-            
-            auto rev() const
-            {
-                BLT_TRACE(this->end_.base().get_index());
-                BLT_TRACE(this->begin_.base().get_index());
-                return enumerator<Iter>{this->end_.base().base(), this->begin_.base().base(), this->end_.base().get_index(),
-                                        this->begin_.base().get_index(), this->container_size};
-            }
-    };
-    
-    template<typename Iter>
-    class enumerator<Iter, std::enable_if_t<blt::meta::is_forward_iterator_v<Iter>, std::void_t<std::forward_iterator_tag>>>
-            : public enumerator_base<Iter, enumerate_wrapper<Iter>>
-    {
-        public:
-            using enumerator_base<Iter, enumerate_wrapper<Iter>>::enumerator_base;
-    };
-    
-    template<typename Iter>
-    class enumerator<Iter, std::enable_if_t<blt::meta::is_bidirectional_iterator_v<Iter>, std::void_t<std::bidirectional_iterator_tag>>>
-            : public enumerator_reversible<Iter, enumerate_wrapper<Iter>>
-    {
-        public:
-            using enumerator_reversible<Iter, enumerate_wrapper<Iter>>::enumerator_reversible;
-    };
-    
-    template<typename Iter>
-    class enumerator<Iter, std::enable_if_t<blt::meta::is_random_access_iterator_v<Iter>, std::void_t<std::random_access_iterator_tag>>>
-            : public enumerator_reversible<Iter, enumerate_wrapper<Iter>>
-    {
-        public:
-            using enumerator_reversible<Iter, enumerate_wrapper<Iter>>::enumerator_reversible;
-            
-            auto skip(blt::size_t offset)
-            {
-                return enumerator<Iter>{this->begin_.base() + offset, this->end_.base(), this->begin_.get_index() + offset, this->container_size,
-                                        this->container_size};
-            }
-    };
-    
-    template<typename Iter>
-    class enumerator_rev<Iter, std::enable_if_t<blt::meta::is_bidirectional_iterator_v<Iter>, std::void_t<std::bidirectional_iterator_tag>>>
-            : public enumerator_reversible_rev<Iter, std::reverse_iterator<enumerate_wrapper<Iter>>>
-    {
-        public:
-            using enumerator_reversible_rev<Iter, std::reverse_iterator<enumerate_wrapper<Iter>>>::enumerator_reversible_rev;
-    };
-    
-    template<typename Iter>
-    class enumerator_rev<Iter, std::enable_if_t<blt::meta::is_random_access_iterator_v<Iter>, std::void_t<std::random_access_iterator_tag>>>
-            : public enumerator_reversible_rev<Iter, std::reverse_iterator<enumerate_wrapper<Iter>>>
-    {
-        public:
-            using enumerator_reversible_rev<Iter, std::reverse_iterator<enumerate_wrapper<Iter>>>::enumerator_reversible_rev;
-            
-            auto skip(blt::size_t offset)
-            {
-                return enumerator_rev<Iter>{this->begin_.base().base() - offset, this->end_.base().base(), this->begin_.base().get_index() - offset,
-                                            this->container_size, this->container_size};
-            }
-    };
-    
-    template<typename Iter>
-    enumerator(Iter, Iter) -> enumerator<Iter>;
-    
-    template<typename Iter>
-    enumerator(Iter, Iter, blt::size_t) -> enumerator<Iter>;
-    
-    template<typename Iter>
-    enumerator(Iter, Iter, blt::size_t, blt::size_t) -> enumerator<Iter>;
-    
-    template<typename T>
-    static inline auto enumerate(const T& container)
-    {
-        return enumerator{container.begin(), container.end(), container.size()};
-    }
-    
-    template<typename T, blt::size_t size>
-    static inline auto enumerate(const T(& container)[size])
-    {
-        return enumerator{&container[0], &container[size], size};
-    }
-    
-    template<typename T, blt::size_t size>
-    static inline auto enumerate(T(& container)[size])
-    {
-        return enumerator{&container[0], &container[size], size};
-    }
-    
-    template<typename T>
-    static inline auto enumerate(T& container)
-    {
-        return enumerator{container.begin(), container.end(), container.size()};
-    }
-    
-    template<typename T>
-    static inline auto enumerate(T&& container)
-    {
-        return enumerator{container.begin(), container.end(), container.size()};
-    }
-    
     namespace itr
     {
-        
         template<typename Begin, typename End>
         class itr_container
         {
diff --git a/src/blt/parse/argparse.cpp b/src/blt/parse/argparse.cpp
index d6c34cf..a467e2a 100644
--- a/src/blt/parse/argparse.cpp
+++ b/src/blt/parse/argparse.cpp
@@ -6,6 +6,7 @@
 #include <blt/parse/argparse.h>
 #include <iostream>
 #include <blt/std/string.h>
+#include <blt/std/iterator.h>
 #include <algorithm>
 #include "blt/std/utility.h"
 
diff --git a/src/blt/parse/obj_loader.cpp b/src/blt/parse/obj_loader.cpp
index d211be7..af5eb3d 100644
--- a/src/blt/parse/obj_loader.cpp
+++ b/src/blt/parse/obj_loader.cpp
@@ -21,6 +21,7 @@
 #include <blt/parse/obj_loader.h>
 #include <blt/fs/loader.h>
 #include <blt/std/string.h>
+#include <blt/std/iterator.h>
 #include <cctype>
 #include <charconv>
 #include "blt/std/assert.h"