Is there a way to do negative lookahead in vim regex?

Question

In Vim, is there a way to search for lines that match say abc but do not also contain xyz later on the line? So the following lines would match:

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Answer 1

I think I'd write this as /abc\(\(xyz\)\@!.\)*$

I'm not sure whether this is faster than other suggestions (I think it might be since it tests each position only once) but it makes conceptual sense as:

"abc followed by anything which is not xyz, any number of times until end of line"

I like that better than "abc followed by anything not followed by xyz" as in the other patterns mentioned.