vcpkg/ports/azure-storage-cpp/pplx-do-while.patch

diff --git a/Microsoft.WindowsAzure.Storage/includes/wascore/executor.h b/Microsoft.WindowsAzure.Storage/includes/wascore/executor.h
index 756163d..6fbfd44 100644
--- a/Microsoft.WindowsAzure.Storage/includes/wascore/executor.h
+++ b/Microsoft.WindowsAzure.Storage/includes/wascore/executor.h
@@ -366,7 +366,7 @@ namespace azure { namespace storage { namespace core {
             // TODO: Reduce usage of auto variable types
 
             auto instance = std::make_shared<executor_impl>(command, options, context);
-            return pplx::details::do_while([instance]() -> pplx::task<bool>
+            return details::_do_while([instance]() -> pplx::task<bool>
             {
                 // 0. Begin request 
                 instance->validate_location_mode();
diff --git a/Microsoft.WindowsAzure.Storage/includes/wascore/util.h b/Microsoft.WindowsAzure.Storage/includes/wascore/util.h
index f3401f2..6a6aa48 100644
--- a/Microsoft.WindowsAzure.Storage/includes/wascore/util.h
+++ b/Microsoft.WindowsAzure.Storage/includes/wascore/util.h
@@ -127,6 +127,21 @@ namespace azure { namespace storage { namespace core {
     };
 #endif
 
+    namespace details
+    {
+        template<class F, class T = bool>
+        pplx::task<T> _do_while(F func)
+        {
+            pplx::task<T> first = func();
+            return first.then([=](bool guard) -> pplx::task<T> {
+                if (guard)
+                    return azure::storage::core::details::_do_while<F,T>(func);
+                else
+                    return first;
+            });
+        }
+    }
+
 }}} // namespace azure::storage::core
 
 #pragma pop_macro("max")
diff --git a/Microsoft.WindowsAzure.Storage/src/util.cpp b/Microsoft.WindowsAzure.Storage/src/util.cpp
index dd2250a..b8d1341 100644
--- a/Microsoft.WindowsAzure.Storage/src/util.cpp
+++ b/Microsoft.WindowsAzure.Storage/src/util.cpp
@@ -98,7 +98,7 @@ namespace azure { namespace storage {  namespace core {
         auto obuffer = ostream.streambuf();
         auto length_ptr = (length != std::numeric_limits<utility::size64_t>::max()) ? std::make_shared<utility::size64_t>(length) : nullptr;
         auto total_ptr = std::make_shared<utility::size64_t>(0);
-        return pplx::details::do_while([istream, obuffer, buffer_size, length_ptr, total_ptr, max_length] () -> pplx::task<bool>
+        return azure::storage::core::details::_do_while([istream, obuffer, buffer_size, length_ptr, total_ptr, max_length] () -> pplx::task<bool>
         {
             size_t read_length = buffer_size;
             if ((length_ptr != nullptr) && (*length_ptr < read_length))