Function NeedPromoteTypes

paddle/fluid/framework/data_type.cc:105–108

Now only supports promotion of complex type

// Now only supports promotion of complex type
inline bool NeedPromoteTypes(const proto::VarType::Type& a,
                             const proto::VarType::Type& b) {
  return (IsComplexType(a) || IsComplexType(b));
}

int DataTypeNumAlign(const proto::VarType::Type t) {
  int cast_type_num = -1;