1 files changed, 9 insertions, 0 deletions
diff --git a/toolsrc/include/vcpkg/base/util.h b/toolsrc/include/vcpkg/base/util.h
index 213adb67c..e629ef0b2 100644
--- a/toolsrc/include/vcpkg/base/util.h
+++ b/toolsrc/include/vcpkg/base/util.h
@@ -6,9 +6,18 @@
 #include <unordered_map>
 #include <utility>
 #include <vector>
+#include <type_traits>
 
 namespace vcpkg::Util
 {
+    template <class T>
+    constexpr std::add_const_t<T>& as_const(T& t) noexcept
+    {
+        return t;
+    }
+    template <class T>
+    void as_const(const T&&) = delete;
+
     template<class Container>
     using ElementT =
         std::remove_reference_t<decltype(*std::declval<typename std::remove_reference_t<Container>::iterator>())>;