std::unordered_map initial range support (no extra template args yet)

examples/format.cc

@@ -2,7 +2,7 @@
 
 #include <ostd/algorithm.hh>
 #include <ostd/vector.hh>
-#include <ostd/map.hh>
+#include <ostd/unordered_map.hh>
 #include <ostd/range.hh>
 #include <ostd/io.hh>
 
@@ -52,7 +52,7 @@ int main() {
         return range(v + 1);
     }));
 
-    Map<std::string, int> m = {
+    std::unordered_map<std::string, int> m = {
         { "foo", 5  },
         { "bar", 10 },
         { "baz", 15 }

ostd/unordered_map.hh

@@ -0,0 +1,54 @@
+/* OctaSTD extensions for std::unordered_map.
+ *
+ * This file is part of OctaSTD. See COPYING.md for futher information.
+ */
+
+#ifndef OSTD_UNORDERED_MAP_HH
+#define OSTD_UNORDERED_MAP_HH
+
+#include <unordered_map>
+
+#include "ostd/range.hh"
+
+namespace ostd {
+
+template<typename K, typename T>
+struct ranged_traits<std::unordered_map<K, T>> {
+    using Range = IteratorRange<typename std::unordered_map<K, T>::iterator>;
+    static Range iter(std::unordered_map<K, T> &v) {
+        return Range{v.begin(), v.end()};
+    }
+};
+
+template<typename K, typename T>
+struct ranged_traits<std::unordered_map<K, T> const> {
+    using Range = IteratorRange<typename std::unordered_map<K, T>::const_iterator>;
+    static Range iter(std::unordered_map<K, T> const &v) {
+        return Range{v.cbegin(), v.cend()};
+    }
+};
+
+template<typename K, typename T, typename R>
+inline std::unordered_map<K, T> make_unordered_map(R range) {
+    /* TODO: specialize for contiguous ranges and matching value types */
+    std::unordered_map<K, T> ret;
+    for (; !range.empty(); range.pop_front()) {
+        ret.emplace(range.front());
+    }
+    return ret;
+}
+
+template<typename R>
+inline std::unordered_map<
+    typename RangeValue<R>::first_type,
+    typename RangeValue<R>::second_type
+> make_unordered_map(R range) {
+    return make_unordered_map<
+        typename RangeValue<R>::first_type,
+        typename RangeValue<R>::second_type
+    >(std::move(range));
+}
+
+} /* namespace ostd */
+
+#endif