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#! /usr/bin/ruby -p
# -*- coding: us-ascii -*-
# Used to build the Ruby parsing code in common.mk and Ripper.
BEGIN {
require 'optparse'
$:.unshift(File.dirname(__FILE__))
require 'vpath'
vpath = VPath.new
header = nil
opt = OptionParser.new do |o|
vpath.def_options(o)
header = o.order!(ARGV).shift
end or abort opt.opt_s
TOKENS = {}
h = vpath.read(header) rescue abort("#{header} not found in #{vpath.inspect}")
h.scan(/^#define\s+RUBY_TOKEN_(\w+)\s+(\d+)/) do |token, id|
TOKENS[token] = id
end
TOKENS_RE = /\bRUBY_TOKEN\((#{TOKENS.keys.join('|')})\)\s*(?=\s)/
}
$_.gsub!(TOKENS_RE) {TOKENS[$1]} if /^%token/ =~ $_
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