Fixes to alternating_update default printing

Author: emstoudenmire

src/solvers/alternating_update/alternating_update.jl

@@ -9,8 +9,8 @@ function alternating_update(
   nsites, # define default for each level of solver implementation
   updater,  # this specifies the update performed locally
   outputlevel=default_outputlevel(),
-  region_printer=nothing,
-  sweep_printer=nothing,
+  region_printer=default_region_printer,
+  sweep_printer=default_sweep_printer,
   (sweep_observer!)=nothing,
   (region_observer!)=nothing,
   root_vertex=GraphsExtensions.default_root_vertex(init_state),
@@ -59,7 +59,7 @@ function alternating_update(
   (sweep_observer!)=nothing,
   sweep_printer=default_sweep_printer,#?
   (region_observer!)=nothing,
-  region_printer=nothing,
+  region_printer=default_region_printer,
 )
   state = copy(init_state)
   @assert !isnothing(sweep_plans)

src/solvers/alternating_update/region_update.jl

@@ -112,6 +112,7 @@ function region_update(
     outputlevel,
     info...,
     region_kwargs...,
+    inserter_kwargs...,
     internal_kwargs...,
   )
   update_observer!(region_observer!; all_kwargs...)

src/solvers/defaults.jl

@@ -8,9 +8,9 @@ default_inserter() = default_inserter
 default_checkdone() = (; kws...) -> false
 default_transform_operator() = nothing
 function default_region_printer(;
-  cutoff,
-  maxdim,
-  mindim,
+  cutoff=nothing,
+  mindim=nothing,
+  maxdim=nothing,
   outputlevel,
   state,
   sweep_plan,
@@ -23,9 +23,9 @@ function default_region_printer(;
     region = first(sweep_plan[which_region_update])
     @printf("Sweep %d, region=%s \n", which_sweep, region)
     print("  Truncated using")
-    @printf(" cutoff=%.1E", cutoff)
-    @printf(" maxdim=%d", maxdim)
-    @printf(" mindim=%d", mindim)
+    !isnothing(cutoff) && @printf(" cutoff=%.1E", cutoff)
+    !isnothing(maxdim) && @printf(" maxdim=%d", maxdim)
+    !isnothing(mindim) && @printf(" mindim=%d", mindim)
     println()
     if spec != nothing
       @printf(