From addecbfdefe9f00214db9af438b0fe255e92a16a Mon Sep 17 00:00:00 2001
From: Alexander Karatarakis <alkarata@microsoft.com>
Date: Thu, 22 Sep 2016 23:28:14 -0700
Subject: Introduce vcpkg_Maps utility namespace

---
 toolsrc/include/vcpkg_Maps.h | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
 create mode 100644 toolsrc/include/vcpkg_Maps.h

(limited to 'toolsrc/include')

diff --git a/toolsrc/include/vcpkg_Maps.h b/toolsrc/include/vcpkg_Maps.h
new file mode 100644
index 000000000..5b7b8ed46
--- /dev/null
+++ b/toolsrc/include/vcpkg_Maps.h
@@ -0,0 +1,18 @@
+#pragma once
+
+#include <unordered_map>
+#include <unordered_set>
+
+namespace vcpkg { namespace Maps
+{
+    template <typename K, typename V>
+    std::unordered_set<K> extract_key_set(const std::unordered_map<K, V>& input_map)
+    {
+        std::unordered_set<K> key_set;
+        for (auto const& element : input_map)
+        {
+            key_set.insert(element.first);
+        }
+        return key_set;
+    }
+}}
-- 
cgit v1.2.3