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instance method

ERB#def_method

def_method(mod, methodname, fname='(ERB)')

# File tmp/rubies/ruby-3.2.0/lib/erb.rb, line 464
def def_method(mod, methodname, fname='(ERB)')
  src = self.src.sub(/^(?!#|$)/) {"def #{methodname}\n"} << "\nend\n"
  mod.module_eval do
    eval(src, binding, fname, -1)
  end
end

Define methodname as instance method of mod from compiled Ruby source.

example:

Example

filename = 'example.rhtml'   # 'arg1' and 'arg2' are used in example.rhtml
erb = ERB.new(File.read(filename))
erb.def_method(MyClass, 'render(arg1, arg2)', filename)
print MyClass.new.render('foo', 123)

See also #def_class #def_module .version #location= also in 4.1 · 4.0 · 3.4 · 3.3 · 3.1 · 3.0

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