diff options
Diffstat (limited to 'trunk/sample/exyacc.rb')
| -rw-r--r-- | trunk/sample/exyacc.rb | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/trunk/sample/exyacc.rb b/trunk/sample/exyacc.rb new file mode 100644 index 0000000000..c96ebfd676 --- /dev/null +++ b/trunk/sample/exyacc.rb @@ -0,0 +1,20 @@ +#! /usr/local/bin/ruby -Kn +# usage: exyacc.rb [yaccfiles] +# this is coverted from exyacc.pl in the camel book + +ARGF.each(nil) do |source| + sbeg = source.index("\n%%") + 1 + send = source.rindex("\n%%") + 1 + grammer = source[sbeg, send-sbeg] + grammer.sub!(/.*\n/, "") + grammer.gsub!(/'\{'/, "'\001'") + grammer.gsub!(/'\}'/, "'\002'") + grammer.gsub!(%r{\*/}, "\003\003") + grammer.gsub!(%r{/\*[^\003]*\003\003}, '') + while grammer.gsub!(/\{[^{}]*\}/, ''); end + grammer.gsub!(/'\001'/, "'{'") + grammer.gsub!(/'\002'/, "'}'") + while grammer.gsub!(/^[ \t]*\n(\s)/, '\1'); end + grammer.gsub!(/([:|])[ \t\n]+(\w)/, '\1 \2') + print grammer +end |