Class: DocoptNG::OneOrMore

Inherits:
ParentPattern show all
Defined in:
lib/docopt_ng/one_or_more.rb

Instance Attribute Summary

Attributes inherited from ParentPattern

#children

Attributes inherited from Pattern

#children

Instance Method Summary collapse

Methods inherited from ParentPattern

#flat, #initialize, #inspect

Methods inherited from Pattern

#==, #dump, #either, #fix, #fix_identities, #fix_repeating_arguments, #to_str

Constructor Details

This class inherits a constructor from DocoptNG::ParentPattern

Instance Method Details

#match(left, collected = nil) ⇒ Object

Raises:

  • (RuntimeError) 


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# File 'lib/docopt_ng/one_or_more.rb', line 5

def match(left, collected = nil)
  raise RuntimeError if children.count != 1

  collected ||= []
  l = left
  c = collected
  l_ = nil
  matched = true
  times = 0
  while matched
    # could it be that something didn't match but changed l or c?
    matched, l, c = children[0].match(l, c)
    times += (matched ? 1 : 0)
    break if l_ == l

    l_ = l
  end

  if times.positive?
    [true, l, c]
  else
    [false, left, collected]
  end
end