class ExecJS::Runtime

def available?
  raise NotImplementedError
end

def compile(source, options = {})
  if context_class.instance_method(:initialize).arity == 2
    context_class.new(self, source)
  else
    context_class.new(self, source, options)
  end
end

def context_class
  self.class::Context
end

def deprecated?
  false
end

def eval(source, options = {})
  context = compile("", options)
  if context.method(:eval).arity == 1
    context.eval(source)
  else
    context.eval(source, options)
  end
end

def exec(source, options = {})
  context = compile("", options)
  if context.method(:exec).arity == 1
    context.exec(source)
  else
    context.exec(source, options)
  end
end

def name
  raise NotImplementedError
end