bucbar `$|` %bcbr

Atom or cell

$| is a tile rune that produces a %reed, a tile whose icon is a fork between two nouns: an atom of tile p and a cell of tile q. $| is similar to $?, but is more strict in that in only contains one atom tile and one cell tile.

### Produces

Tile: [%reed p=tile q=tile]

Sample

p is a tile q is a tile

Tall form

$|  p
    q

Wide form

$|(p q)

Irregular form

None

Examples

~zod/try=> *$|(~ [~ u=@])
~
~zod/try=> :type; *$|(~ [~ u=@])
~
u(@)

++  list  |*  a=_,*                                     ::  null-terminated list
          $|(~ [i=a t=(list a)])                        ::

In ++list, $| specifies that every element in a noun that can be cast to a ++list is either the atom ~ or the cell [i=a t=(list a)].

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bucbar $| %bcbr