LinkedList
InvocationChain tracks the chain of task invocations to detect circular dependencies.
Append an invocation to the chain of invocations. It is an error if the invocation already listed.
# File rake-13.0.6/lib/rake/invocation_chain.rb, line 15
def append(invocation)
if member?(invocation)
fail RuntimeError, "Circular dependency detected: #{to_s} => #{invocation}"
end
conj(invocation)
end