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#! /usr/local/bin/ruby -Cn
# usage: exyacc.rb [yaccfiles]
# this is coverted from exyacc.pl in the camel book
$/ = nil
while gets()
sbeg = $_.index("\n%%") + 1
send = $_.rindex("\n%%") + 1
$_ = $_[sbeg, send-sbeg]
sub(/.*\n/, "")
gsub(/'{'/, "'\001'")
gsub(/'}'/, "'\002'")
gsub('\*/', "\003\003")
gsub("/\\*[^\003]*\003\003", '')
while gsub(/{[^}{]*}/, ''); end
gsub(/'\001'/, "'{'")
gsub(/'\002'/, "'}'")
while gsub(/^[ \t]*\n(\s)/, '\1'); end
gsub(/([:|])[ \t\n]+(\w)/, '\1 \2')
print $_
end
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