urbit/base/pub/doc/hoon/runes/sg/sgbr.md
2015-04-29 18:48:45 -04:00

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[sigbar, `~|`, %sgbr](#sgbr)
============================
Add to stacktrace
`~|` is a synthetic hoon that presents the product of `p` in the stack
trace if `q` crashes. The computation is only performed if needed.
Produces
--------
Twig: `[%sgbr 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
--------