Treetop::Runtime::SyntaxNode

    # File lib/treetop/runtime/syntax_node.rb, line 7
 7:       def initialize(input, interval, elements = nil)
 8:         @input = input
 9:         @interval = interval
10:         @elements = elements
11:       end

    # File lib/treetop/runtime/syntax_node.rb, line 45
45:       def <=>(other)
46:         self.interval.first <=> other.interval.first
47:       end

    # File lib/treetop/runtime/syntax_node.rb, line 89
89:       def dot_id
90:         @dot_id ||= @@dot_id_counter += 1
91:       end

    # File lib/treetop/runtime/syntax_node.rb, line 13
13:       def elements
14:         return @elements if terminal?
15:         # replace the character class placeholders in the sequence (lazy instantiation)
16:         last_element = nil
17:         @comprehensive_elements ||= @elements.map do |element|
18:           if element == true
19:             index = last_element ? last_element.interval.last : interval.first
20:             element = SyntaxNode.new(input, index...(index + 1))
21:           end
22:           element.parent = self
23:           last_element = element
24:         end
25: 
26:         @comprehensive_elements
27:       end

    # File lib/treetop/runtime/syntax_node.rb, line 41
41:       def empty?
42:         interval.first == interval.last && interval.exclude_end?
43:       end

    # File lib/treetop/runtime/syntax_node.rb, line 49
49:       def extension_modules
50:         local_extensions =
51:           class <<self
52:             included_modules-Object.included_modules
53:           end
54:         if local_extensions.size > 0
55:           local_extensions
56:         else
57:           []    # There weren't any; must be a literal node
58:         end
59:       end

    # File lib/treetop/runtime/syntax_node.rb, line 61
61:       def inspect(indent="")
62:         em = extension_modules
63:         interesting_methods = methods-[em.last ? em.last.methods : nil]-self.class.instance_methods
64:         im = interesting_methods.size > 0 ? " (#{interesting_methods.join(",")})" : ""
65:         tv = text_value
66:         tv = "...#{tv[-20..-1]}" if tv.size > 20
67: 
68:         indent +
69:         self.class.to_s.sub(/.*:/,'') +
70:           em.map{|m| "+"+m.to_s.sub(/.*:/,'')}*"" +
71:           " offset=#{interval.first}" +
72:           ", #{tv.inspect}" +
73:           im +
74:           (elements && elements.size > 0 ?
75:             ":" +
76:               (elements||[]).map{|e|
77:           begin
78:             "\n"+e.inspect(indent+"  ")
79:           rescue  # Defend against inspect not taking a parameter
80:             "\n"+indent+" "+e.inspect
81:           end
82:               }.join("") :
83:             ""
84:           )
85:       end

    # File lib/treetop/runtime/syntax_node.rb, line 33
33:       def nonterminal?
34:         !terminal?
35:       end

    # File lib/treetop/runtime/syntax_node.rb, line 29
29:       def terminal?
30:         @elements.nil?
31:       end

    # File lib/treetop/runtime/syntax_node.rb, line 37
37:       def text_value
38:         input[interval]
39:       end

     # File lib/treetop/runtime/syntax_node.rb, line 93
 93:       def write_dot(io)
 94:         io.puts "node#{dot_id} [label=\"'#{text_value}'\"];"
 95:         if nonterminal? then
 96:           elements.each do
 97:             |x|
 98:             io.puts "node#{dot_id} -> node#{x.dot_id};"
 99:             x.write_dot(io)
100:           end
101:         end
102:       end

     # File lib/treetop/runtime/syntax_node.rb, line 104
104:       def write_dot_file(fname)
105:         File.open(fname + ".dot","w") do
106:           |file|
107:           file.puts "digraph G {"
108:           write_dot(file)
109:           file.puts "}"
110:         end
111:       end