urbit/pub/doc/hoon/runes/sm/smsm.md

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2015-02-18 06:03:21 +03:00
[semsem, `;;`, %smsm](#smsm)
============================
Fixpoint
`;;` is a synthetic hoon that types `q` as a fixpoint of `p`. More
specifically, `;;` slams `q` through gate `p`, asserting that the
resulting noun [`.=`]() the original, and produces it.
See also
--------
[`++hard`]()
Produces
--------
Twig: `[%smsm p=twig q=twig]`
Sample
------
`p` is a [twig](). `q` is a [twig]().
Tall form
---------
;; p
q
Wide form
---------
;;(p q)
Irregular form
--------------
None
Examples
--------
~zod/try=> ^-(tape ~[97 98 99])
! type-fail
! exit
~zod/try=> ;;(tape ~[97 98 99])
"abc"
~zod/try=> (tape [50 51 52])
"23"
~zod/try=> ;;(tape [50 51 52])
! exit