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 



7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
 
# 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.map { |k, memos|
  #  (memos || []).map { |v| "  #{k} -> #{v.object_id};" }
  #}.flatten.uniq

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