match?(p1) public

Tests whether the given pattern is matched from the current scan pointer. Returns the length of the match, or nil. The scan pointer is not advanced. 

  s = StringScanner.new('test string')
  p s.match?(/\w+/)   # -> 4
  p s.match?(/\w+/)   # -> 4
  p s.match?(/\s+/)   # -> nil
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