location_parser_gist.rb

require 'parslet'
require 'parslet/convenience'
require 'awesome_print'
require 'byebug'

class LocationParser < Parslet::Parser

  # literals
  rule(:space)   { str(' ') }
  rule(:spaces)  { space.repeat(0) }

  # composite literals
  rule(:newline)        { str("\r").maybe >> str("\n") }

  # grammar structure
  rule(:address_word)   { match('[\w\-\. ]').repeat >> space.maybe }

  # line repeat
  rule(:line)           { address_word.as(:line) >> newline.maybe }


  rule(:new_string) { line.repeat }

  root(:new_string)
end

str = "165 HOPKINS STREET\n\tHOPKINS STREET between THROOP AVENUE and TOMPKINS AVENUE\n159 HOPKINS STREET\n\tTOMPKINS AVENUE between FLUSHING AVENUE and PARK AVENUE\n630 FLUSHING AVENUE"


def run_parse(str)
  begin
    x = LocationParser.new.parse(str)

    puts "---\n#{x}\n---"

  rescue Parslet::ParseFailed => failure
    puts failure.cause.ascii_tree

    print "\n"
    ap str
  end
end


run_parse(str)

Change match('[\w\-\. ]').repeat to match('[\w\-\. ]').repeat(1) to avoid infinite loop.