class Asciidoctor::PreprocessorReader

def initialize document, data = nil, cursor = nil, opts = {}
  @document = document
  super data, cursor, opts
  if (default_include_depth = (document.attributes['max-include-depth'] || 64).to_i) > 0
    # track absolute max depth, current max depth for comparing to include stack size, and relative max depth for reporting
    @maxdepth = { abs: default_include_depth, curr: default_include_depth, rel: default_include_depth }
  else
    # if @maxdepth is not set, built-in include functionality is disabled
    @maxdepth = nil
  end
  @include_stack = []
  @includes = document.catalog[:includes]
  @skipping = false
  @conditional_stack = []
  @include_processor_extensions = nil
end