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#!/usr/bin/ruby -pi
BEGIN {
require_relative 'colorize'
colorize = Colorize.new
file = ARGV.shift
unless /\Abison .* (\d+)\.\d+/ =~ IO.popen(ARGV+%w[--version], &:read)
puts colorize.fail("not bison")
exit
end
exit if $1.to_i >= 3
ARGV.clear
ARGV.push(file)
}
$_.sub!(/^%define\s+api\.pure/, '%pure-parser')
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