Contents

#!/usr/bin/env ruby
# ebnf2ttl --- Generate reasoned Turtle representation of EBNF input file
# to be used in extracting parser branch tables (see gramLL1).

$:.unshift(File.expand_path(File.join(File.dirname(__FILE__), "..", 'lib')))
require "bundler/setup"
require 'rubygems'
require 'getoptlong'
require 'ebnf'
require 'sxp'

options = {
  :format => :sxp,
  :prefix => "ttl",
  :namespace => "http://www.w3.org/ns/formats/Turtle#",
}

out = STDOUT

opts = GetoptLong.new(
  ["--dbg", GetoptLong::NO_ARGUMENT],
  ["--bnf", GetoptLong::NO_ARGUMENT],
  ["--execute", "-e", GetoptLong::REQUIRED_ARGUMENT],
  ["--output", "-o", GetoptLong::REQUIRED_ARGUMENT],
  ["--format", "-f", GetoptLong::REQUIRED_ARGUMENT],
  ["--prefix", "-p", GetoptLong::REQUIRED_ARGUMENT],
  ["--namespace", "-n", GetoptLong::REQUIRED_ARGUMENT],
  ["--verbose", GetoptLong::NO_ARGUMENT]
)

opts.each do |opt, arg|
  case opt
  when '--dbg'          then options[:debug] = true
  when '--bnf'          then options[:bnf] = true
  when '--execute'      then input = arg
  when '--format'       then options[:format] = arg.to_sym
  when '--output'       then out = File.open(arg, "w")
  when '--prefix'       then options[:prefix] = arg
  when '--namespace'    then options[:namespace] = arg
  when '--verbose'      then $verbose = true
  end
end

input = File.open(ARGV[0]) if ARGV[0]

ebnf = EBNF.new(input || STDIN, options)
ebnf = ebnf.make_bnf if options[:bnf]
res = case options[:format]
when :sxp     then ebnf.to_sxp
when :ttl     then ebnf.to_ttl(options[:prefix], options[:namespace])
else          ebnf.ast.inspect
end

out.puts res

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
ebnf-0.0.1	bin/ebnf