class AST2Dot
Constants
- VERSION
Attributes
ast[R]
graph_edges[R]
node_labels[R]
Public Class Methods
new(code)
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# File lib/ast2dot.rb, line 12 def initialize(code) @ast = RubyVM::AbstractSyntaxTree.parse(code) @template = File.read(File.expand_path('templates/default.dot.erb', __dir__)) end
render(code)
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# File lib/ast2dot.rb, line 6 def self.render(code) new(code).render end
Public Instance Methods
export()
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# File lib/ast2dot.rb, line 17 def export end
render()
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# File lib/ast2dot.rb, line 20 def render @graph_edges = [] @node_labels = Hash.new node_labelling(ast) graph_data = ERB.new(@template, nil, '-').result(binding) graph_data.lines.map(&:rstrip).join("\n") end
Private Instance Methods
node_labelling(parent, index = 1)
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# File lib/ast2dot.rb, line 32 def node_labelling(parent, index = 1) children_idx = parent.children.map do |child| next unless child.instance_of?(RubyVM::AbstractSyntaxTree::Node) index = node_labelling(child, index) index - 1 end.compact children_idx.each do |idx| @graph_edges << { from: index, to: idx } end @node_labels[index] = parent.type index + 1 end