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50 lines
603 B
Markdown
50 lines
603 B
Markdown
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[zapwut, `!?`, %zpwt](#zpwt)
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============================
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Restrict version
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`!?` is a synthetic rune that enforces a Hoon version restriction.
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Produces
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--------
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Twig: `[%zpwt p=twig]`
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Sample
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------
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`p` is a [twig]().
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Tall form
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---------
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To declare code that runs only in Hoon 164K or newer:
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!? 164
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q
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To declare code that runs only in 164K through 161K:
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!? [164 161]
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q
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Wide form
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---------
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None
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Irregular form
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--------------
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None
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Examples
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--------
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~zod/try=> !?(264 (add 2 2))
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4
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~zod/try=> !?(164 (add 2 2))
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4
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~zod/try=> !?(163 (add 2 2))
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! exit
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