Boolean expression pattern matching with tuples

[sbuttgereit]

@cd-slash

case {level, has_children_or_no_children} do
  {n when n < 5, :has_children} ->
    1

  {n when n > 0, :no_children} ->
    2

  _ ->
    false
end

The guard needs to be outside of the match:

case {level, has_children_or_no_children} do
  {n, :has_children} when n < 5 -> 1
  {n, :no_children} when n > 0 -> 2
  _ -> false
end