Neither-nor oneline REGEXP

Is it possible to write a regexp rule in "one line" that says: neither A nor B.

For example:

String 开发者_运维知识库must contain NEITHER "foo" NOR "bar".

Why one line? Because the filtering tool I am using accepts only one line ... I have tried things like (.*foo.*){0}(.*bar.*){0} without enough luck.

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^(?!.*(foo|bar)).*$