ERB#def_class

(?::Class, ?::String) -> ::Class

def_class(superklass=Object, methodname='result')

# File tmp/rubies/ruby-3.4.1/lib/erb.rb, line 500
def def_class(superklass=Object, methodname='result')
  cls = Class.new(superklass)
  def_method(cls, methodname, @filename || '(ERB)')
  cls
end

Define unnamed class which has methodname as instance method, and return it.

example:

Example

class MyClass_
  def initialize(arg1, arg2)
    @arg1 = arg1;  @arg2 = arg2
  end
end
filename = 'example.rhtml'  # @arg1 and @arg2 are used in example.rhtml
erb = ERB.new(File.read(filename))
erb.filename = filename
MyClass = erb.def_class(MyClass_, 'render()')
print MyClass.new('foo', 123).render()

See also .version #def_method .new #def_module also in 4.1 · 4.0 · 3.3 · 3.2 · 3.1 · 3.0

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