From: Wayne Blair <wayne.blair@...>
Date: 2001-05-22T16:41:26+09:00
Subject: [ruby-talk:15535] Re: new xmp - please test

Sorry for that brutal first post.  In any case, I modified xmp.rb to fix the
bug declared in its documentation, in which the report followed a
statement's output.  Please check this bug fix see if it should make its way
into the repository.  (Please also let me know a better procedure for
posting this kind of thing.)

Wayne

Here is source to test, sans documentation.
module Kernel
  XMP_VERSION = "2001-05-22"
  XMP_DEFAULT_OPTION = ["%l\n    #%r\n", "\n    #   "]

  ###### Start code added by Wayne ######
  def initBuffers
    @buffers = Array.new
    def @buffers.reset
      clear
      @currentIndex = -1
    end

    def @buffers.incrementIndex
      @currentIndex += 1
      push ""
    end

    def @buffers.write(str)
      if @currentIndex < 0
        STDOUT << str
      else
        at(@currentIndex) << str
      end
    end
  end

  def setStdOut
    $defout = STDOUT
  end
  private :setStdOut

  def setBufferOut
    $defout = @buffers
  end
  private :setBufferOut
  ###### End code added by Wayne ######

  def xmpsec(*a) puts *a; end

  def xmp(arg, fmt = XMP_DEFAULT_OPTION[0], sep=XMP_DEFAULT_OPTION[1])

    if fmt
      print fmt
      ###### Begin code added by Wayne ######
      initBuffers if @buffers==nil
      @buffers.reset
      setBufferOut
      ###### End code added by Wayne ######
      fmt = fmt.to_s
      eval("___sep___ = #{sep.inspect}; ___res___ = []", TOPLEVEL_BINDING)
      eval(arg.gsub(/^(.*)\n?/){
             @buffers.incrementIndex  ### Added by Wayne
      %Q|
             begin
        ___res___ << "=> " + (#{$1}).inspect.gsub(/\n^/, ___sep___);
             rescue Exception
               ___res___ << "!! " + $!;
             end|}, TOPLEVEL_BINDING)
      setStdOut  ### Added by Wayne
      arg.split(/\n/).each_with_index{|l,i|
 (puts "\n" ; next) if l =~ /^$/
 res = fmt.gsub(/%l/, l)
 res = res.gsub(/%r/, eval("___res___", TOPLEVEL_BINDING)[i])
 print res
 ### Added by Wayne - adds extra newline to any buffer that is printed
 print(@buffers[i] + "\n") if @buffers[i] && @buffers[i].length>0
      }
    else
      print arg; # eval(arg, TOPLEVEL_BINDING)
    end
    return nil
  end
  alias __xmp__ xmp

end



if __FILE__ == $0

  puts "## EXAMPLE 1"
  xmp "nil.to_i"

  puts ""
  puts "## EXAMPLE 2"
  xmp <<-EOS
  a = "The moon Fly"
  b = [a.split, "TO", "Me"]
  b = b.flatten
  b.sort!
  b.join(" ").capitalize
  EOS

  puts ""
  puts "## EXAMPLE 3"
  xmp <<-EOS, false
  class Foo
    attr :a, true
  end

  EOS

  xmp <<-EOS
  foo = Foo.new
  foo.a
  foo.a = 10
  foo.b
  foo.a
  EOS
end