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#--
# ERB::DefMethod
#
# Utility module to define eRuby script as instance method.
#
# === Example
#
# example.rhtml:
# <% for item in @items %>
# <b><%= item %></b>
# <% end %>
#
# example.rb:
# require 'erb'
# class MyClass
# extend ERB::DefMethod
# def_erb_method('render()', 'example.rhtml')
# def initialize(items)
# @items = items
# end
# end
# print MyClass.new([10,20,30]).render()
#
# result:
#
# <b>10</b>
#
# <b>20</b>
#
# <b>30</b>
#
module ERB::DefMethod
# define _methodname_ as instance method of current module, using ERB
# object or eRuby file
def def_erb_method(methodname, erb_or_fname)
if erb_or_fname.kind_of? String
fname = erb_or_fname
erb = ERB.new(File.read(fname))
erb.def_method(self, methodname, fname)
else
erb = erb_or_fname
erb.def_method(self, methodname, erb.filename || '(ERB)')
end
end
module_function :def_erb_method
end