Method: Module#set

Defined in:
lib/core/facets/module/set.rb

#set(option, value = self, &block) ⇒ Object

Sets an option to the given value. If the value is a proc, the proc will be called every time the option is accessed.

CREDIT: Blake Mizerany (Sinatra)

Raises:

  • (ArgumentError) 


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# File 'lib/core/facets/module/set.rb', line 10

def set(option, value=self, &block)
  raise ArgumentError if block && value != self
  value = block if block
  if value.kind_of?(Proc)
    if value.arity == 1
      yield self
    else
      (class << self; self; end).module_eval do
        define_method(option, &value)
        define_method("#{option}?"){ !!__send__(option) }
        define_method("#{option}="){ |val| set(option, Proc.new{val}) }
      end
    end
  elsif value == self
    option.each{ |k,v| set(k, v) }
  elsif respond_to?("#{option}=")
    __send__("#{option}=", value)
  else
    set(option, Proc.new{value})
  end
  self
end