Module: ActionDispatch::Journey::NFA::Dot

Included in:
GTG::TransitionTable, TransitionTable
Defined in:
actionpack/lib/action_dispatch/journey/nfa/dot.rb

Overview

:nodoc:

Instance Method Summary collapse

Instance Method Details

#to_dot ⇒ Object 



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# File 'actionpack/lib/action_dispatch/journey/nfa/dot.rb', line 7

def to_dot
  edges = transitions.map { |from, sym, to|
    "  #{from} -> #{to} [label=\"#{sym || 'ε'}\"];"
  }

  # memo_nodes = memos.values.flatten.map { |n|
  #   label = n
  #   if Journey::Route === n
  #     label = "#{n.verb.source} #{n.path.spec}"
  #   end
  #   "  #{n.object_id} [label=\"#{label}\", shape=box];"
  # }
  # memo_edges = memos.flat_map { |k, memos|
  #   (memos || []).map { |v| "  #{k} -> #{v.object_id};" }
  # }.uniq

  <<-eodot
digraph nfa {
  rankdir=LR;
  node [shape = doublecircle];
  #{accepting_states.join ' '};
  node [shape = circle];
#{edges.join "\n"}
}
  eodot
end