DPL: proper SFINAE to support 1.3.X

Author: ktf

Framework/Core/src/DataProcessingDevice.cxx

@@ -45,15 +45,15 @@ namespace
 struct FairMQDeviceLegacyWrapper {
   // If both APIs are available, this has precendence because of dummy.
   // Only the old API before the deprecation had FairMQSocket::TrySend().
-  template <typename T>
-  static auto ReceiveAsync(T* device, FairMQParts& parts, std::string const& channel, int dummy) -> typename std::enable_if<(sizeof(decltype(std::declval<FairMQSocket>().TrySend(parts.At(0)))) > 0), int>::type
+  template <typename S>
+  static auto ReceiveAsync(FairMQDevice* device, FairMQParts& parts, std::string const& channel, int dummy) -> typename std::enable_if<(sizeof(decltype(std::declval<S>().TrySend(parts.At(0)))) > 0), int>::type
   {
     return device->ReceiveAsync(parts, channel);
   }
 
   // Otherwise if we are here it means that TrySend() is not there anymore
-  template <typename T>
-  static auto ReceiveAsync(T* device, FairMQParts& parts, std::string const& channel, long dummy) -> int
+  template <typename S>
+  static auto ReceiveAsync(FairMQDevice* device, FairMQParts& parts, std::string const& channel, long dummy) -> int
   {
     return device->Receive(parts, channel, 0, 0);
   }
@@ -125,7 +125,7 @@ bool DataProcessingDevice::ConditionalRun()
   bool active = false;
   for (auto& channel : mSpec.inputChannels) {
     FairMQParts parts;
-    auto result = FairMQDeviceLegacyWrapper::ReceiveAsync(this, parts, channel.name, 0);
+    auto result = FairMQDeviceLegacyWrapper::ReceiveAsync<FairMQSocket>(this, parts, channel.name, 0);
     if (result > 0) {
       this->handleData(parts);
       active |= this->tryDispatchComputation();