MRA: Fix handling of function buffer

The function buffer doesn't provide the interface to
query the initial level.

Signed-off-by: Joseph Schuchart <joseph.schuchart@stonybrook.edu>

examples/madness/mra-device/mrattg-device.cc

@@ -30,7 +30,7 @@ auto make_start(const ttg::Edge<mra::Key<NDIM>, void>& ctl) {
 template<typename FnT, typename T, mra::Dimension NDIM>
 auto make_project(
   mra::Domain<NDIM>& domain,
-  ttg::Buffer<FnT>& f,
+  ttg::Buffer<FnT>& fb,
   std::size_t K,
   const mra::FunctionData<T, NDIM>& functiondata,
   const T thresh, /// should be scalar value not complex
@@ -46,6 +46,7 @@ auto make_project(
     auto result = node_type(key, K);
     tensor_type& coeffs = result.coeffs;
     auto outputs = ttg::device::forward();
+    auto& f = *fb.host_ptr();
 
     if (key.level() < initial_level(f)) {
       std::vector<mra::Key<NDIM>> bcast_keys;
@@ -61,7 +62,7 @@ auto make_project(
       coeffs.current_view() = T(1e7); // set to obviously bad value to detect incorrect use
       result.is_leaf = false;
     }
-    else if (mra::is_negligible<FnT,T,NDIM>(*f.host_ptr(), domain.template bounding_box<T>(key), mra::truncate_tol(key,thresh))) {
+    else if (mra::is_negligible<FnT,T,NDIM>(f, domain.template bounding_box<T>(key), mra::truncate_tol(key,thresh))) {
       /* zero coeffs */
       coeffs.current_view() = T(0.0);
       result.is_leaf = true;
@@ -88,15 +89,15 @@ auto make_project(
 
       /* TODO: cannot do this from a function, need to move it into the main task */
 #ifndef TTG_ENABLE_HOST
-      co_await ttg::device::select(db, gl, f, coeffs.buffer(), phibar.buffer(),
+      co_await ttg::device::select(db, gl, fb, coeffs.buffer(), phibar.buffer(),
                                    hgT.buffer(), tmp_scratch, is_leaf_scratch);
 #endif
       auto coeffs_view = coeffs.current_view();
       auto phibar_view = phibar.current_view();
       auto hgT_view    = hgT.current_view();
       T* tmp_device = tmp_scratch.device_ptr();
       bool *is_leaf_device = is_leaf_scratch.device_ptr();
-      FnT* f_ptr   = f.current_device_ptr();
+      FnT* f_ptr   = fb.current_device_ptr();
       auto& domain = *db.current_device_ptr();
       auto  gldata = gl.current_device_ptr();
 
@@ -390,7 +391,7 @@ auto make_reconstruct(
 static std::mutex printer_guard;
 template <typename keyT, typename valueT>
 auto make_printer(const ttg::Edge<keyT, valueT>& in, const char* str = "", const bool doprint=true) {
-  auto func = [str,doprint](const keyT& key, const auto& value, auto& out) {
+  auto func = [str,doprint](const keyT& key, const valueT& value) {
     if (doprint) {
       std::lock_guard<std::mutex> obolus(printer_guard);
       std::cout << str << " (" << key << "," << value << ")" << std::endl;