class Sass::Constant::Literal

def self.filter_value(value)
  value
end

def self.from_value(value)
  instance = self.new
  instance.instance_variable_set('@value', self.filter_value(value))
  instance
end

def self.parse(value)
  case value
  when NUMBER
    Sass::Constant::Number.new(value)
  when COLOR
    Sass::Constant::Color.new(value)
  else
    Sass::Constant::String.new(value)
  end
end

def concat(other)
  Sass::Constant::String.from_value("#{self.to_s} #{other.to_s}")
end

def initialize(value = nil)
  self.parse(value) if value
end

def perform
  self
end