Rename containers.hh to ranges.hh (and Container to Range)

23 files changed, 372 insertions, 372 deletions

diff --git a/src/alias_registry.cc b/src/alias_registry.cc
index 9804aefc..96f2e4ef 100644
--- a/src/alias_registry.cc
+++ b/src/alias_registry.cc
@@ -1,7 +1,7 @@
 #include "alias_registry.hh"
 
 #include "command_manager.hh"
-#include "containers.hh"
+#include "ranges.hh"
 
 namespace Kakoune
 {
diff --git a/src/buffer.cc b/src/buffer.cc
index 147e1bbf..a44cccf1 100644
--- a/src/buffer.cc
+++ b/src/buffer.cc
@@ -4,12 +4,12 @@
 #include "buffer_manager.hh"
 #include "buffer_utils.hh"
 #include "client.hh"
-#include "containers.hh"
 #include "context.hh"
 #include "diff.hh"
 #include "file.hh"
 #include "flags.hh"
 #include "option_types.hh"
+#include "ranges.hh"
 #include "shared_string.hh"
 #include "unit_tests.hh"
 #include "utils.hh"
diff --git a/src/buffer_manager.cc b/src/buffer_manager.cc
index 430f8eff..0c9b052f 100644
--- a/src/buffer_manager.cc
+++ b/src/buffer_manager.cc
@@ -3,9 +3,9 @@
 #include "assert.hh"
 #include "buffer.hh"
 #include "client_manager.hh"
-#include "containers.hh"
 #include "exception.hh"
 #include "file.hh"
+#include "ranges.hh"
 #include "string.hh"
 
 namespace Kakoune
diff --git a/src/client_manager.cc b/src/client_manager.cc
index fd4cfe1a..c721f1db 100644
--- a/src/client_manager.cc
+++ b/src/client_manager.cc
@@ -2,10 +2,10 @@
 
 #include "buffer_manager.hh"
 #include "command_manager.hh"
-#include "containers.hh"
 #include "event_manager.hh"
 #include "face_registry.hh"
 #include "file.hh"
+#include "ranges.hh"
 #include "window.hh"
 
 namespace Kakoune
diff --git a/src/color.cc b/src/color.cc
index 26855d20..19df9752 100644
--- a/src/color.cc
+++ b/src/color.cc
@@ -1,7 +1,7 @@
 #include "color.hh"
 
-#include "containers.hh"
 #include "exception.hh"
+#include "ranges.hh"
 #include "regex.hh"
 
 #include <cstdio>
diff --git a/src/command_manager.cc b/src/command_manager.cc
index 61c4f74c..1d9a5042 100644
--- a/src/command_manager.cc
+++ b/src/command_manager.cc
@@ -2,14 +2,14 @@
 
 #include "alias_registry.hh"
 #include "assert.hh"
+#include "buffer_utils.hh"
 #include "context.hh"
 #include "flags.hh"
+#include "optional.hh"
+#include "ranges.hh"
 #include "register_manager.hh"
 #include "shell_manager.hh"
 #include "utils.hh"
-#include "optional.hh"
-#include "containers.hh"
-#include "buffer_utils.hh"
 
 #include <algorithm>
 
diff --git a/src/commands.cc b/src/commands.cc
index 1e583adb..a52c34e3 100644
--- a/src/commands.cc
+++ b/src/commands.cc
@@ -7,7 +7,6 @@
 #include "client_manager.hh"
 #include "command_manager.hh"
 #include "completion.hh"
-#include "containers.hh"
 #include "context.hh"
 #include "event_manager.hh"
 #include "face_registry.hh"
@@ -15,14 +14,15 @@
 #include "hash_map.hh"
 #include "highlighter.hh"
 #include "highlighters.hh"
+#include "insert_completer.hh"
 #include "option_manager.hh"
 #include "option_types.hh"
 #include "parameters_parser.hh"
+#include "ranges.hh"
 #include "ranked_match.hh"
+#include "regex.hh"
 #include "register_manager.hh"
-#include "insert_completer.hh"
 #include "remote.hh"
-#include "regex.hh"
 #include "shell_manager.hh"
 #include "string.hh"
 #include "user_interface.hh"
diff --git a/src/containers.hh b/src/containers.hh
deleted file mode 100644
index fe986f1a..00000000
--- a/src/containers.hh
+++ /dev/null
@@ -1,333 +0,0 @@
-#ifndef containers_hh_INCLUDED
-#define containers_hh_INCLUDED
-
-#include <algorithm>
-#include <utility>
-#include <iterator>
-#include <numeric>
-
-namespace Kakoune
-{
-
-template<typename Func> struct ViewFactory { Func func; };
-
-template<typename Func>
-ViewFactory<std::decay_t<Func>>
-make_view_factory(Func&& func) { return {std::forward<Func>(func)}; }
-
-template<typename Container, typename Func>
-decltype(auto) operator| (Container&& container, ViewFactory<Func> factory)
-{
-    return factory.func(std::forward<Container>(container));
-}
-
-template<typename Container>
-struct decay_container_impl { using type = std::decay_t<Container>; };
-
-template<typename Container>
-struct decay_container_impl<Container&> { using type = Container&; };
-
-template<typename Container>
-using decay_container = typename decay_container_impl<Container>::type;
-
-template<typename Container>
-struct ReverseView
-{
-    decltype(auto) begin() { return m_container.rbegin(); }
-    decltype(auto) end()   { return m_container.rend(); }
-
-    Container m_container;
-};
-
-inline auto reverse()
-{
-    return make_view_factory([](auto&& container) {
-        using Container = decltype(container);
-        return ReverseView<decay_container<Container>>{std::forward<Container>(container)};
-    });
-}
-
-template<typename Container>
-using IteratorOf = decltype(std::begin(std::declval<Container>()));
-
-template<typename Container>
-using ValueOf = typename Container::value_type;
-
-template<typename Container, typename Filter>
-struct FilterView
-{
-    using ContainerIt = IteratorOf<Container>;
-
-    struct Iterator : std::iterator<std::forward_iterator_tag,
-                                    typename std::iterator_traits<ContainerIt>::value_type>
-    {
-        Iterator(const FilterView& view, ContainerIt it, ContainerIt end)
-            : m_it{std::move(it)}, m_end{std::move(end)}, m_view{view}
-        {
-            do_filter();
-        }
-
-        decltype(auto) operator*() { return *m_it; }
-        Iterator& operator++() { ++m_it; do_filter(); return *this; }
-        Iterator operator++(int) { auto copy = *this; ++(*this); return copy; }
-
-        friend bool operator==(const Iterator& lhs, const Iterator& rhs)
-        {
-            return lhs.m_it == rhs.m_it;
-        }
-
-        friend bool operator!=(const Iterator& lhs, const Iterator& rhs)
-        {
-            return not (lhs == rhs);
-        }
-
-        const ContainerIt& base() const { return m_it; }
-
-    private:
-        void do_filter()
-        {
-            while (m_it != m_end and not m_view.m_filter(*m_it))
-                ++m_it;
-        }
-
-        ContainerIt m_it;
-        ContainerIt m_end;
-        const FilterView& m_view;
-    };
-
-    Iterator begin() const { return {*this, std::begin(m_container), std::end(m_container)}; }
-    Iterator end()   const { return {*this, std::end(m_container), std::end(m_container)}; }
-
-    Container m_container;
-    mutable Filter m_filter;
-};
-
-template<typename Filter>
-inline auto filter(Filter f)
-{
-    return make_view_factory([f = std::move(f)](auto&& container) {
-        using Container = decltype(container);
-        return FilterView<decay_container<Container>, Filter>{std::forward<Container>(container), std::move(f)};
-    });
-}
-
-template<typename Container, typename Transform>
-struct TransformView
-{
-    using ContainerIt = IteratorOf<Container>;
-    using ResType = decltype(std::declval<Transform>()(*std::declval<ContainerIt>()));
-
-    struct Iterator : std::iterator<std::forward_iterator_tag, std::remove_reference_t<ResType>>
-    {
-        Iterator(const TransformView& view, ContainerIt it)
-            : m_it{std::move(it)}, m_view{view} {}
-
-        decltype(auto) operator*() { return m_view.m_transform(*m_it); }
-        Iterator& operator++() { ++m_it; return *this; }
-        Iterator operator++(int) { auto copy = *this; ++m_it; return copy; }
-
-        friend bool operator==(const Iterator& lhs, const Iterator& rhs)
-        {
-            return lhs.m_it == rhs.m_it;
-        }
-
-        friend bool operator!=(const Iterator& lhs, const Iterator& rhs)
-        {
-            return not (lhs == rhs);
-        }
-
-        ContainerIt base() const { return m_it; }
-
-    private:
-        ContainerIt m_it;
-        const TransformView& m_view;
-    };
-
-    Iterator begin() const { return {*this, std::begin(m_container)}; }
-    Iterator end()   const { return {*this, std::end(m_container)}; }
-
-    Container m_container;
-    mutable Transform m_transform;
-};
-
-template<typename Transform>
-inline auto transform(Transform t)
-{
-    return make_view_factory([t = std::move(t)](auto&& container) {
-        using Container = decltype(container);
-        return TransformView<decay_container<Container>, Transform>{std::forward<Container>(container), std::move(t)};
-    });
-}
-
-template<typename Container, typename Separator = ValueOf<Container>,
-         typename ValueTypeParam = void>
-struct SplitView
-{
-    using ContainerIt = IteratorOf<Container>;
-    using ValueType = std::conditional_t<std::is_same<void, ValueTypeParam>::value,
-                                         std::pair<IteratorOf<Container>, IteratorOf<Container>>,
-                                         ValueTypeParam>;
-
-    struct Iterator : std::iterator<std::forward_iterator_tag, ValueType>
-    {
-        Iterator(ContainerIt pos, ContainerIt end, char separator)
-         : pos(pos), sep(pos), end(end), separator(separator)
-        {
-            while (sep != end and *sep != separator)
-                ++sep;
-        }
-
-        Iterator& operator++() { advance(); return *this; }
-        Iterator operator++(int) { auto copy = *this; advance(); return copy; }
-
-        bool operator==(const Iterator& other) const { return pos == other.pos; }
-        bool operator!=(const Iterator& other) const { return pos != other.pos; }
-
-        ValueType operator*() { return {pos, sep}; }
-
-    private:
-        void advance()
-        {
-            if (sep == end)
-            {
-                pos = end;
-                return;
-            }
-
-            pos = sep+1;
-            for (sep = pos; sep != end; ++sep)
-            {
-                if (*sep == separator)
-                    break;
-            }
-        }
-
-        ContainerIt pos;
-        ContainerIt sep;
-        ContainerIt end;
-        Separator separator;
-    };
-
-    Iterator begin() const { return {std::begin(m_container), std::end(m_container), m_separator}; }
-    Iterator end()   const { return {std::end(m_container), std::end(m_container), m_separator}; }
-
-    Container m_container;
-    Separator m_separator;
-};
-
-template<typename ValueType = void, typename Separator>
-auto split(Separator separator)
-{
-    return make_view_factory([s = std::move(separator)](auto&& container) {
-        using Container = decltype(container);
-        return SplitView<decay_container<Container>, Separator, ValueType>{std::forward<Container>(container), std::move(s)};
-    });
-}
-
-template<typename Container1, typename Container2>
-struct ConcatView
-{
-    using ContainerIt1 = decltype(begin(std::declval<Container1>()));
-    using ContainerIt2 = decltype(begin(std::declval<Container2>()));
-    using ValueType = typename std::common_type_t<typename std::iterator_traits<ContainerIt1>::value_type,
-                                                  typename std::iterator_traits<ContainerIt2>::value_type>;
-
-    struct Iterator : std::iterator<std::forward_iterator_tag, ValueType>
-    {
-        static_assert(std::is_convertible<typename std::iterator_traits<ContainerIt1>::value_type, ValueType>::value, "");
-        static_assert(std::is_convertible<typename std::iterator_traits<ContainerIt2>::value_type, ValueType>::value, "");
-
-        Iterator(ContainerIt1 it1, ContainerIt1 end1, ContainerIt2 it2)
-            : m_it1(std::move(it1)), m_end1(std::move(end1)),
-              m_it2(std::move(it2)) {}
-
-        ValueType operator*() { return is2() ? *m_it2 : *m_it1; }
-        Iterator& operator++() { if (is2()) ++m_it2; else ++m_it1; return *this; }
-        Iterator operator++(int) { auto copy = *this; ++*this; return copy; }
-
-        friend bool operator==(const Iterator& lhs, const Iterator& rhs)
-        {
-            return lhs.m_it1 == rhs.m_it1 and lhs.m_end1 == rhs.m_end1 and
-                   lhs.m_it2 == rhs.m_it2;
-        }
-
-        friend bool operator!=(const Iterator& lhs, const Iterator& rhs)
-        {
-            return not (lhs == rhs);
-        }
-
-    private:
-        bool is2() const { return m_it1 == m_end1; }
-
-        ContainerIt1 m_it1;
-        ContainerIt1 m_end1;
-        ContainerIt2 m_it2;
-    };
-
-    ConcatView(Container1& container1, Container2& container2)
-        : m_container1(container1), m_container2(container2) {}
-
-    Iterator begin() const { return {m_container1.begin(), m_container1.end(), m_container2.begin()}; }
-    Iterator end()   const { return {m_container1.end(), m_container1.end(), m_container2.end()}; }
-
-private:
-    Container1& m_container1;
-    Container2& m_container2;
-};
-
-template<typename Container1, typename Container2>
-ConcatView<Container1, Container2> concatenated(Container1&& container1, Container2&& container2)
-{
-    return {container1, container2};
-}
-
-template<typename Container, typename T>
-auto find(Container&& container, const T& value)
-{
-    using std::begin; using std::end;
-    return std::find(begin(container), end(container), value);
-}
-
-template<typename Container, typename T>
-auto find_if(Container&& container, T op)
-{
-    using std::begin; using std::end;
-    return std::find_if(begin(container), end(container), op);
-}
-
-template<typename Container, typename T>
-bool contains(Container&& container, const T& value)
-{
-    using std::end;
-    return find(container, value) != end(container);
-}
-
-template<typename Container, typename T>
-bool contains_that(Container&& container, T op)
-{
-    using std::end;
-    return find_if(container, op) != end(container);
-}
-
-template<typename Container, typename U>
-void unordered_erase(Container&& vec, U&& value)
-{
-    auto it = find(vec, std::forward<U>(value));
-    if (it != vec.end())
-    {
-        using std::swap;
-        swap(vec.back(), *it);
-        vec.pop_back();
-    }
-}
-
-template<typename Container, typename Init, typename BinOp>
-Init accumulate(Container&& c, Init&& init, BinOp&& op)
-{
-    using std::begin; using std::end;
-    return std::accumulate(begin(c), end(c), init, op);
-}
-
-}
-
-#endif // containers_hh_INCLUDED
diff --git a/src/event_manager.cc b/src/event_manager.cc
index 7a0614dc..63f47858 100644
--- a/src/event_manager.cc
+++ b/src/event_manager.cc
@@ -1,7 +1,7 @@
 #include "event_manager.hh"
 
-#include "containers.hh"
 #include "flags.hh"
+#include "ranges.hh"
 
 #include <unistd.h>
 
diff --git a/src/face_registry.cc b/src/face_registry.cc
index f6129554..8d509f04 100644
--- a/src/face_registry.cc
+++ b/src/face_registry.cc
@@ -1,7 +1,7 @@
 #include "face_registry.hh"
 
-#include "containers.hh"
 #include "exception.hh"
+#include "ranges.hh"
 
 namespace Kakoune
 {
diff --git a/src/highlighter_group.cc b/src/highlighter_group.cc
index eaa8d4bc..4860d59d 100644
--- a/src/highlighter_group.cc
+++ b/src/highlighter_group.cc
@@ -1,6 +1,6 @@
 #include "highlighter_group.hh"
 
-#include "containers.hh"
+#include "ranges.hh"
 
 namespace Kakoune
 {
diff --git a/src/highlighters.cc b/src/highlighters.cc
index 71d0abb9..71ff7a1b 100644
--- a/src/highlighters.cc
+++ b/src/highlighters.cc
@@ -3,21 +3,21 @@
 #include "assert.hh"
 #include "buffer_utils.hh"
 #include "changes.hh"
-#include "context.hh"
-#include "containers.hh"
 #include "command_manager.hh"
+#include "context.hh"
 #include "display_buffer.hh"
 #include "face_registry.hh"
 #include "highlighter_group.hh"
 #include "line_modification.hh"
 #include "option.hh"
 #include "parameters_parser.hh"
-#include "register_manager.hh"
+#include "ranges.hh"
 #include "regex.hh"
+#include "register_manager.hh"
 #include "string.hh"
-#include "window.hh"
 #include "utf8.hh"
 #include "utf8_iterator.hh"
+#include "window.hh"
 
 #include <locale>
 #include <cstdio>
diff --git a/src/hook_manager.cc b/src/hook_manager.cc
index fc274f8a..5e538681 100644
--- a/src/hook_manager.cc
+++ b/src/hook_manager.cc
@@ -1,14 +1,14 @@
 #include "hook_manager.hh"
 
+#include "buffer_utils.hh"
 #include "clock.hh"
-#include "containers.hh"
+#include "command_manager.hh"
 #include "context.hh"
-#include "buffer_utils.hh"
 #include "display_buffer.hh"
 #include "face_registry.hh"
-#include "command_manager.hh"
-#include "regex.hh"
 #include "option.hh"
+#include "ranges.hh"
+#include "regex.hh"
 
 namespace Kakoune
 {
diff --git a/src/json_ui.cc b/src/json_ui.cc
index e907be24..8f4d4663 100644
--- a/src/json_ui.cc
+++ b/src/json_ui.cc
@@ -1,13 +1,13 @@
 #include "json_ui.hh"
 
-#include "containers.hh"
 #include "display_buffer.hh"
+#include "event_manager.hh"
 #include "exception.hh"
-#include "keys.hh"
 #include "file.hh"
-#include "event_manager.hh"
-#include "value.hh"
+#include "keys.hh"
+#include "ranges.hh"
 #include "unit_tests.hh"
+#include "value.hh"
 
 #include <utility>
 
diff --git a/src/keys.cc b/src/keys.cc
index 3b2c7100..8ddea2b4 100644
--- a/src/keys.cc
+++ b/src/keys.cc
@@ -1,7 +1,7 @@
 #include "keys.hh"
 
-#include "containers.hh"
 #include "exception.hh"
+#include "ranges.hh"
 #include "string.hh"
 #include "unit_tests.hh"
 #include "utf8_iterator.hh"
diff --git a/src/main.cc b/src/main.cc
index 81ad37bc..66394627 100644
--- a/src/main.cc
+++ b/src/main.cc
@@ -6,7 +6,6 @@
 #include "client_manager.hh"
 #include "command_manager.hh"
 #include "commands.hh"
-#include "containers.hh"
 #include "context.hh"
 #include "event_manager.hh"
 #include "face_registry.hh"
@@ -17,6 +16,7 @@
 #include "ncurses_ui.hh"
 #include "option_types.hh"
 #include "parameters_parser.hh"
+#include "ranges.hh"
 #include "regex.hh"
 #include "register_manager.hh"
 #include "remote.hh"
diff --git a/src/ncurses_ui.cc b/src/ncurses_ui.cc
index b9e80e52..b9131462 100644
--- a/src/ncurses_ui.cc
+++ b/src/ncurses_ui.cc
@@ -1,9 +1,9 @@
 #include "ncurses_ui.hh"
 
-#include "containers.hh"
 #include "display_buffer.hh"
 #include "event_manager.hh"
 #include "keys.hh"
+#include "ranges.hh"
 
 #include <algorithm>
 
diff --git a/src/normal.cc b/src/normal.cc
index bc8d955b..c7b37811 100644
--- a/src/normal.cc
+++ b/src/normal.cc
@@ -3,17 +3,17 @@
 #include "buffer.hh"
 #include "buffer_manager.hh"
 #include "buffer_utils.hh"
-#include "client_manager.hh"
 #include "changes.hh"
+#include "client_manager.hh"
 #include "command_manager.hh"
 #include "commands.hh"
-#include "containers.hh"
 #include "context.hh"
 #include "diff.hh"
 #include "face_registry.hh"
 #include "file.hh"
 #include "flags.hh"
 #include "option_manager.hh"
+#include "ranges.hh"
 #include "regex.hh"
 #include "register_manager.hh"
 #include "selectors.hh"
diff --git a/src/option_manager.hh b/src/option_manager.hh
index 08bb0aa6..3e2568cb 100644
--- a/src/option_manager.hh
+++ b/src/option_manager.hh
@@ -2,12 +2,12 @@
 #define option_manager_hh_INCLUDED
 
 #include "completion.hh"
-#include "containers.hh"
 #include "exception.hh"
-#include "option.hh"
-#include "vector.hh"
 #include "hash_map.hh"
+#include "option.hh"
+#include "ranges.hh"
 #include "utils.hh"
+#include "vector.hh"
 
 #include <memory>
 #include <type_traits>
diff --git a/src/option_types.hh b/src/option_types.hh
index 1c44ddce..01d7ea3b 100644
--- a/src/option_types.hh
+++ b/src/option_types.hh
@@ -3,11 +3,11 @@
 
 #include "array_view.hh"
 #include "coord.hh"
-#include "containers.hh"
 #include "exception.hh"
 #include "flags.hh"
 #include "hash_map.hh"
 #include "option.hh"
+#include "ranges.hh"
 #include "string.hh"
 #include "units.hh"
 
diff --git a/src/ranges.hh b/src/ranges.hh
new file mode 100644
index 00000000..f1c11be8
--- /dev/null
+++ b/src/ranges.hh
@@ -0,0 +1,333 @@
+#ifndef ranges_hh_INCLUDED
+#define ranges_hh_INCLUDED
+
+#include <algorithm>
+#include <utility>
+#include <iterator>
+#include <numeric>
+
+namespace Kakoune
+{
+
+template<typename Func> struct ViewFactory { Func func; };
+
+template<typename Func>
+ViewFactory<std::decay_t<Func>>
+make_view_factory(Func&& func) { return {std::forward<Func>(func)}; }
+
+template<typename Range, typename Func>
+decltype(auto) operator| (Range&& range, ViewFactory<Func> factory)
+{
+    return factory.func(std::forward<Range>(range));
+}
+
+template<typename Range>
+struct decay_range_impl { using type = std::decay_t<Range>; };
+
+template<typename Range>
+struct decay_range_impl<Range&> { using type = Range&; };
+
+template<typename Range>
+using decay_range = typename decay_range_impl<Range>::type;
+
+template<typename Range>
+struct ReverseView
+{
+    decltype(auto) begin() { return m_range.rbegin(); }
+    decltype(auto) end()   { return m_range.rend(); }
+
+    Range m_range;
+};
+
+inline auto reverse()
+{
+    return make_view_factory([](auto&& range) {
+        using Range = decltype(range);
+        return ReverseView<decay_range<Range>>{std::forward<Range>(range)};
+    });
+}
+
+template<typename Range>
+using IteratorOf = decltype(std::begin(std::declval<Range>()));
+
+template<typename Range>
+using ValueOf = typename Range::value_type;
+
+template<typename Range, typename Filter>
+struct FilterView
+{
+    using RangeIt = IteratorOf<Range>;
+
+    struct Iterator : std::iterator<std::forward_iterator_tag,
+                                    typename std::iterator_traits<RangeIt>::value_type>
+    {
+        Iterator(const FilterView& view, RangeIt it, RangeIt end)
+            : m_it{std::move(it)}, m_end{std::move(end)}, m_view{view}
+        {
+            do_filter();
+        }
+
+        decltype(auto) operator*() { return *m_it; }
+        Iterator& operator++() { ++m_it; do_filter(); return *this; }
+        Iterator operator++(int) { auto copy = *this; ++(*this); return copy; }
+
+        friend bool operator==(const Iterator& lhs, const Iterator& rhs)
+        {
+            return lhs.m_it == rhs.m_it;
+        }
+
+        friend bool operator!=(const Iterator& lhs, const Iterator& rhs)
+        {
+            return not (lhs == rhs);
+        }
+
+        const RangeIt& base() const { return m_it; }
+
+    private:
+        void do_filter()
+        {
+            while (m_it != m_end and not m_view.m_filter(*m_it))
+                ++m_it;
+        }
+
+        RangeIt m_it;
+        RangeIt m_end;
+        const FilterView& m_view;
+    };
+
+    Iterator begin() const { return {*this, std::begin(m_range), std::end(m_range)}; }
+    Iterator end()   const { return {*this, std::end(m_range), std::end(m_range)}; }
+
+    Range m_range;
+    mutable Filter m_filter;
+};
+
+template<typename Filter>
+inline auto filter(Filter f)
+{
+    return make_view_factory([f = std::move(f)](auto&& range) {
+        using Range = decltype(range);
+        return FilterView<decay_range<Range>, Filter>{std::forward<Range>(range), std::move(f)};
+    });
+}
+
+template<typename Range, typename Transform>
+struct TransformView
+{
+    using RangeIt = IteratorOf<Range>;
+    using ResType = decltype(std::declval<Transform>()(*std::declval<RangeIt>()));
+
+    struct Iterator : std::iterator<std::forward_iterator_tag, std::remove_reference_t<ResType>>
+    {
+        Iterator(const TransformView& view, RangeIt it)
+            : m_it{std::move(it)}, m_view{view} {}
+
+        decltype(auto) operator*() { return m_view.m_transform(*m_it); }
+        Iterator& operator++() { ++m_it; return *this; }
+        Iterator operator++(int) { auto copy = *this; ++m_it; return copy; }
+
+        friend bool operator==(const Iterator& lhs, const Iterator& rhs)
+        {
+            return lhs.m_it == rhs.m_it;
+        }
+
+        friend bool operator!=(const Iterator& lhs, const Iterator& rhs)
+        {
+            return not (lhs == rhs);
+        }
+
+        RangeIt base() const { return m_it; }
+
+    private:
+        RangeIt m_it;
+        const TransformView& m_view;
+    };
+
+    Iterator begin() const { return {*this, std::begin(m_range)}; }
+    Iterator end()   const { return {*this, std::end(m_range)}; }
+
+    Range m_range;
+    mutable Transform m_transform;
+};
+
+template<typename Transform>
+inline auto transform(Transform t)
+{
+    return make_view_factory([t = std::move(t)](auto&& range) {
+        using Range = decltype(range);
+        return TransformView<decay_range<Range>, Transform>{std::forward<Range>(range), std::move(t)};
+    });
+}
+
+template<typename Range, typename Separator = ValueOf<Range>,
+         typename ValueTypeParam = void>
+struct SplitView
+{
+    using RangeIt = IteratorOf<Range>;
+    using ValueType = std::conditional_t<std::is_same<void, ValueTypeParam>::value,
+                                         std::pair<IteratorOf<Range>, IteratorOf<Range>>,
+                                         ValueTypeParam>;
+
+    struct Iterator : std::iterator<std::forward_iterator_tag, ValueType>
+    {
+        Iterator(RangeIt pos, RangeIt end, char separator)
+         : pos(pos), sep(pos), end(end), separator(separator)
+        {
+            while (sep != end and *sep != separator)
+                ++sep;
+        }
+
+        Iterator& operator++() { advance(); return *this; }
+        Iterator operator++(int) { auto copy = *this; advance(); return copy; }
+
+        bool operator==(const Iterator& other) const { return pos == other.pos; }
+        bool operator!=(const Iterator& other) const { return pos != other.pos; }
+
+        ValueType operator*() { return {pos, sep}; }
+
+    private:
+        void advance()
+        {
+            if (sep == end)
+            {
+                pos = end;
+                return;
+            }
+
+            pos = sep+1;
+            for (sep = pos; sep != end; ++sep)
+            {
+                if (*sep == separator)
+                    break;
+            }
+        }
+
+        RangeIt pos;
+        RangeIt sep;
+        RangeIt end;
+        Separator separator;
+    };
+
+    Iterator begin() const { return {std::begin(m_range), std::end(m_range), m_separator}; }
+    Iterator end()   const { return {std::end(m_range), std::end(m_range), m_separator}; }
+
+    Range m_range;
+    Separator m_separator;
+};
+
+template<typename ValueType = void, typename Separator>
+auto split(Separator separator)
+{
+    return make_view_factory([s = std::move(separator)](auto&& range) {
+        using Range = decltype(range);
+        return SplitView<decay_range<Range>, Separator, ValueType>{std::forward<Range>(range), std::move(s)};
+    });
+}
+
+template<typename Range1, typename Range2>
+struct ConcatView
+{
+    using RangeIt1 = decltype(begin(std::declval<Range1>()));
+    using RangeIt2 = decltype(begin(std::declval<Range2>()));
+    using ValueType = typename std::common_type_t<typename std::iterator_traits<RangeIt1>::value_type,
+                                                  typename std::iterator_traits<RangeIt2>::value_type>;
+
+    struct Iterator : std::iterator<std::forward_iterator_tag, ValueType>
+    {
+        static_assert(std::is_convertible<typename std::iterator_traits<RangeIt1>::value_type, ValueType>::value, "");
+        static_assert(std::is_convertible<typename std::iterator_traits<RangeIt2>::value_type, ValueType>::value, "");
+
+        Iterator(RangeIt1 it1, RangeIt1 end1, RangeIt2 it2)
+            : m_it1(std::move(it1)), m_end1(std::move(end1)),
+              m_it2(std::move(it2)) {}
+
+        ValueType operator*() { return is2() ? *m_it2 : *m_it1; }
+        Iterator& operator++() { if (is2()) ++m_it2; else ++m_it1; return *this; }
+        Iterator operator++(int) { auto copy = *this; ++*this; return copy; }
+
+        friend bool operator==(const Iterator& lhs, const Iterator& rhs)
+        {
+            return lhs.m_it1 == rhs.m_it1 and lhs.m_end1 == rhs.m_end1 and
+                   lhs.m_it2 == rhs.m_it2;
+        }
+
+        friend bool operator!=(const Iterator& lhs, const Iterator& rhs)
+        {
+            return not (lhs == rhs);
+        }
+
+    private:
+        bool is2() const { return m_it1 == m_end1; }
+
+        RangeIt1 m_it1;
+        RangeIt1 m_end1;
+        RangeIt2 m_it2;
+    };
+
+    ConcatView(Range1& range1, Range2& range2)
+        : m_range1(range1), m_range2(range2) {}
+
+    Iterator begin() const { return {m_range1.begin(), m_range1.end(), m_range2.begin()}; }
+    Iterator end()   const { return {m_range1.end(), m_range1.end(), m_range2.end()}; }
+
+private:
+    Range1& m_range1;
+    Range2& m_range2;
+};
+
+template<typename Range1, typename Range2>
+ConcatView<Range1, Range2> concatenated(Range1&& range1, Range2&& range2)
+{
+    return {range1, range2};
+}
+
+template<typename Range, typename T>
+auto find(Range&& range, const T& value)
+{
+    using std::begin; using std::end;
+    return std::find(begin(range), end(range), value);
+}
+
+template<typename Range, typename T>
+auto find_if(Range&& range, T op)
+{
+    using std::begin; using std::end;
+    return std::find_if(begin(range), end(range), op);
+}
+
+template<typename Range, typename T>
+bool contains(Range&& range, const T& value)
+{
+    using std::end;
+    return find(range, value) != end(range);
+}
+
+template<typename Range, typename T>
+bool contains_that(Range&& range, T op)
+{
+    using std::end;
+    return find_if(range, op) != end(range);
+}
+
+template<typename Range, typename U>
+void unordered_erase(Range&& vec, U&& value)
+{
+    auto it = find(vec, std::forward<U>(value));
+    if (it != vec.end())
+    {
+        using std::swap;
+        swap(vec.back(), *it);
+        vec.pop_back();
+    }
+}
+
+template<typename Range, typename Init, typename BinOp>
+Init accumulate(Range&& c, Init&& init, BinOp&& op)
+{
+    using std::begin; using std::end;
+    return std::accumulate(begin(c), end(c), init, op);
+}
+
+}
+
+#endif // ranges_hh_INCLUDED
diff --git a/src/string.cc b/src/string.cc
index f14abddb..baebf29f 100644
--- a/src/string.cc
+++ b/src/string.cc
@@ -1,9 +1,9 @@
 #include "string.hh"
 
 #include "exception.hh"
-#include "containers.hh"
-#include "utf8_iterator.hh"
+#include "ranges.hh"
 #include "unit_tests.hh"
+#include "utf8_iterator.hh"
 
 #include <cstdio>
 
diff --git a/src/unicode.hh b/src/unicode.hh
index 1355d687..5ce8cd6a 100644
--- a/src/unicode.hh
+++ b/src/unicode.hh
@@ -5,9 +5,9 @@
 #include <cwchar>
 #include <locale>
 
-#include "units.hh"
 #include "array_view.hh"
-#include "containers.hh"
+#include "ranges.hh"
+#include "units.hh"
 
 namespace Kakoune
 {