class Sass::Constant::String

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

def parse(value)
  @value = value
end

def plus(other)
  Sass::Constant::String.from_value(self.to_s + other.to_s)
end

def to_s
  @value
end