From: Stefan Kaes <skaes@...>
Date: 2005-03-16T02:45:41+09:00
Subject: Re: eval/binding question

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code attached.

In the real environment, the names of the locally assigned variables can 
not be determined in advance, of course.




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require 'erb'

class ERBrunner  #all compiled template functions go here
  def get_binding
    binding
  end
end

Erb_runner = ERBrunner.new

class Test
  
  def initialize
    @erb = ERB.new(File.read("test.rhtml"), nil, '%')
    evalstr = "def run_erb\n" +
         "bnd = binding\n" +
         '@locals.each{|k,v| eval "#{k} = @locals[\"#{k}\"]", bnd }' +
         "\n#{@erb.src}\n_erbout\nend\n"
    print evalstr, "\n\n"
    eval evalstr, Erb_runner.get_binding
  end

  def runit
    Erb_runner.instance_variable_set "@mumu", "HALLO"
    Erb_runner.instance_variable_set "@locals", {'mumu'=>"HALLO"}
    bnd = Erb_runner.get_binding
    eval "Erb_runner.run_erb", bnd
  end

end

t = Test.new
print t.runit


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locals:  <%= @locals.inspect %>
locals['mumu']: <%= @locals['mumu'] %>
mumu: <%= mumu rescue "not defined" %>
@mumu: <%= @mumu %>

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