Class: RegexpExamples::Parser

Inherits:
Object
  • Object
show all
Defined in:
lib/regexp-examples/parser.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(regexp_string, options = {}) ⇒ Parser

Returns a new instance of Parser.



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# File 'lib/regexp-examples/parser.rb', line 4

def initialize(regexp_string, options={})
  @regexp_string = regexp_string
  @num_groups = 0
  @current_position = 0
  RegexpExamples::ResultCountLimiters.configure!(
    options[:max_repeater_variance],
    options[:max_group_results]
  )
end

Instance Attribute Details

#regexp_string ⇒ Object (readonly)

Returns the value of attribute regexp_string.



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# File 'lib/regexp-examples/parser.rb', line 3

def regexp_string
  @regexp_string
end

Instance Method Details

#parse ⇒ Object 



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# File 'lib/regexp-examples/parser.rb', line 14

def parse
  repeaters = []
  while @current_position < regexp_string.length
    group = parse_group(repeaters)
    break if group.is_a? MultiGroupEnd
    if group.is_a? OrGroup
      return [OneTimeRepeater.new(group)]
    end
    @current_position += 1
    repeaters << parse_repeater(group)
  end
  repeaters
end