Class: Cucumber::CucumberExpressions::TreeRegexp

Inherits:
Object
  • Object
show all
Defined in:
lib/cucumber/cucumber_expressions/tree_regexp.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(regexp) ⇒ TreeRegexp

Returns a new instance of TreeRegexp.



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# File 'lib/cucumber/cucumber_expressions/tree_regexp.rb', line 8

def initialize(regexp)
  @regexp = regexp.is_a?(Regexp) ? regexp : Regexp.new(regexp)

  stack = [GroupBuilder.new]
  group_start_stack = []
  last = nil
  non_capturing_maybe = false
  @regexp.source.split('').each_with_index do |c, n|
    if c == '(' && last != '\\'
      stack.push(GroupBuilder.new)
      group_start_stack.push(n+1)
      non_capturing_maybe = false
    elsif c == ')' && last != '\\'
      gb = stack.pop
      group_start = group_start_stack.pop
      if gb.capturing?
        gb.source = @regexp.source[group_start...n]
        stack.last.add(gb)
      else
        gb.move_children_to(stack.last)
      end
      non_capturing_maybe = false
    elsif c == '?' && last == '('
      non_capturing_maybe = true
    elsif c == ':' && non_capturing_maybe
      stack.last.set_non_capturing!
      non_capturing_maybe = false
    end
    last = c
  end
  @group_builder = stack.pop
end

Instance Attribute Details

#group_builder ⇒ Object (readonly)

Returns the value of attribute group_builder.



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# File 'lib/cucumber/cucumber_expressions/tree_regexp.rb', line 6

def group_builder
  @group_builder
end

#regexp ⇒ Object (readonly)

Returns the value of attribute regexp.



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# File 'lib/cucumber/cucumber_expressions/tree_regexp.rb', line 6

def regexp
  @regexp
end

Instance Method Details

#match(s) ⇒ Object 



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# File 'lib/cucumber/cucumber_expressions/tree_regexp.rb', line 41

def match(s)
  match = @regexp.match(s)
  return nil if match.nil?
  group_indices = (0..match.length).to_a.to_enum
  @group_builder.build(match, group_indices)
end