Cleanup some code with C++14 features

src/containers.hh

@@ -12,9 +12,11 @@ namespace Kakoune
 template<typename Factory>
 struct ContainerView { Factory factory; };
 
+template<typename Factory>
+ContainerView<Factory> make_view(Factory factory) { return {factory}; }
+
 template<typename Container, typename Factory>
-auto operator| (Container&& container, ContainerView<Factory> view) ->
-    decltype(view.factory(std::forward<Container>(container)))
+decltype(auto) operator| (Container&& container, ContainerView<Factory> view)
 {
     return view.factory(std::forward<Container>(container));
 }
@@ -307,32 +309,31 @@ ConcatView<Container1, Container2> concatenated(Container1&& container1, Contain
     return {container1, container2};
 }
 
-// Todo: move that into the following functions once we can remove the decltype
-//       return type.
-using std::begin;
-using std::end;
-
 template<typename Container, typename T>
-auto find(Container&& container, const T& value) -> decltype(begin(container))
+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) -> decltype(begin(container))
+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);
 }
 

src/keys.cc

@@ -100,7 +100,7 @@ KeyList parse_keys(StringView str)
 
         auto name_it = find_if(keynamemap, [&desc](const KeyAndName& item)
                                            { return item.name == desc; });
-        if (name_it != end(keynamemap))
+        if (name_it != std::end(keynamemap))
             result.push_back(canonicalize_ifn({ modifier, name_it->key }));
         else if (desc.char_length() == 1)
             result.emplace_back(modifier, desc[0_char]);
@@ -151,7 +151,7 @@ String key_to_str(Key key)
     String res;
     auto it = find_if(keynamemap, [&key](const KeyAndName& item)
                                   { return item.key == key.key; });
-    if (it != end(keynamemap))
+    if (it != std::end(keynamemap))
     {
         named = true;
         res = it->name;

src/option_types.hh

@@ -108,9 +108,9 @@ template<typename Key, typename Value, MemoryDomain domain>
 String option_to_string(const HashMap<Key, Value, domain>& opt)
 {
     String res;
-    for (auto it = begin(opt); it != end(opt); ++it)
+    for (auto it = opt.begin(); it != opt.end(); ++it)
     {
-        if (it != begin(opt))
+        if (it != opt.begin())
             res += list_separator;
         String elem = escape(option_to_string(it->key), '=', '\\') + "=" +
                       escape(option_to_string(it->value), '=', '\\');

src/selectors.cc

@@ -365,6 +365,7 @@ find_surrounding(const Container& container, Iterator pos,
                  StringView opening, StringView closing,
                  ObjectFlags flags, int init_level)
 {
+    using std::begin; using std::end;
     return find_surrounding(begin(container), end(container), pos,
                             opening, closing, flags, init_level);
 }