[sigtis, `~=`, %sgts](#sgts)
============================

Equality hint

`~=` is a synthetic hoon that hints to the interpreter that `q` may
produce a noun equal to the already existing `p`, avoiding duplication.

Produces
--------

Twig `[%sgts 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=> 20
    20
    ~zod/try=> =+(a=20 20)
    20
    ~zod/try=> =+(a=20 ~=(a 20))
    20
    ~zod/try=> (make '=+(a=20 20)')
    [%8 p=[%1 p=20] q=[%1 p=20]]
    ~zod/try=> (make '=+(a=20 ~=(a 20))')
    [%8 p=[%1 p=20] q=[%10 p=[p=1.836.213.607 q=[%0 p=2]] q=[%1 p=20]]]
    ~zod/try=> `@tas`1.836.213.607
    %germ